User talk:Abid Qayyum

Alert Bypass The Alert Bypass software switch is valid for all 3500 monitors. When this switch is enabled, all alert alarms will be disabled. Enabling this switch will cause a "bypass" status to be indicated and the module bypass LED to be illuminated. Note: “For Ramp Differential and Case Expansion - Paired, the Channel Bypass switch will only operate on the assigned channel. However, bypassing one channel will cause the Composite proportional value on the other channel in the channel pair to become invalid. The un-bypassed channel will continue to return Gap and Direct (if enabled). For Complementary Input Differential Expansion, both channels of the channel pair will be bypassed when the Bypass switch is set on either channel in the channel pair. As a result, the System Event list will contain entries for both channels of the pair.” Ambient Pressure Ambient (atmospheric) pressure at the location of monitored machine, measured in absolute pressure units. Backup Keyphasor Specifies the Keyphasor channel which will be used to generate synchronous parameters when the primary Keyphasor channel is invalid. Barriers Used to limit the power into a hazardous area. Power, common, and signal input wiring typically have barriers in between the monitoring system and the transducer. The barriers field on the channel options screen allows one or more of the following barriers options depending on channel pair type and the transducer type: •	None •	Internal This option is for use with internal barrier I/O modules. •	External The 3500 Rack Configuration Software will display a specific barrier for a given application. This barrier does not have to be used. In the case of non-standard transducers more than one type of barrier may be acceptable, but the software will only display one. Please refer to the manual for the monitor being used to get appropriate information. •	Galvanic Isolator. A galvanic isolator can be used with a monitor even when the option is not available in the barriers list. In this situation select the 'none' barrier option which will be equivalent to the 'galvanic isolator' option. Baud: Refers to the rate at which messages are transmitted and received from the 3500 Rack Configuration software. Specifically, it represents the number of bits which can be transmitted and received from the Rack Configuration software in 1 second. The Baud Rate setting within the Rack Configuration software must agree with the setting in the Rack Interface Module. The possible values are 2400, 4800, 9600, 19200, and 38400 baud. Bentley 3500 Protocol It allows the user to communicate with 3500 Rack Configuration and Data Acquisition software across an Ethernet WAN or LAN. In Rack Configuration use the network connection option to communicate via the /92 communication gateway module. NOTE: “When two /92 Communication Gateway modules are present in the rack, the /92 in the lowest slot will support the Bentley 3500 protocol. The outboard /92 will disable support for this protocol.” Bentley 3500 protocol is not available when the /92 Communication Gateway module is used in conjunction with a /22 TDI module. In this situation a connection via the /92 module will fail with a communication error. Buffered Keyphasor The buffered input signal from the Keyphasor transducer connected to the channel is provided on the front of the Keyphasor Module and on the Keyphasor I/O Module. This signal can be either processed or non-processed.

Byte Timeout The number of bytes of communication line "dead time" needed to signal an end of message.

Example: Assume a Byte Time out of 3, a baud rate of 9600, and Stop Bits of 1. Since 1 byte at 9600 baud requires 0.001 seconds to be transmitted across the communication line, the 3500 Communication Gateway or 3500 Third party Modbus Display will signal an end of message in 0.003 seconds. Each port may be setup with a different Byte Timeout setting. The possible values are 3, 10, 25, and 50. Byte Timeout -- Rack Interface Module It specifies the number of bytes of communication line "dead time" needed to signal an end of message. Each port on the Rack Interface Module may have a different Byte Timeout setting. The possible values are between 4 and 500 in 4 byte increments. When using modems, you must set this value high enough to ensure that any breaks in the transmissions of the message from the computer will not be interpreted as the end of the message. Many modems may embed large gaps in a message under the following conditions: •	Different baud rates between computer to modem and modem to modem (when flow control is used) •	Data Compression •	Error Correction Example Assume a Byte Timeout of 4, a baud rate of 9600, and Stop Bits of 1. Since 1 byte at 9600 baud requires 0.001 seconds to be transmitted across the communication line, the 3500 Rack Interface Module will signal an end of message in 0.004 seconds. If the byte timeout is not configured properly, Timeout errors will be reported during transactions with the rack. Byte Timeout -- Transient Data Interface It specifies the number of bytes of communication line "dead time" needed to signal an end of message. The possible values for the front port on the Transient Data Interface are between 4 and 500 in 1 byte increments. When using modems, you must set this value high enough to ensure that any breaks in the transmissions of the message from the computer will not be interpreted as the end of the message. Many modems may embed large gaps in a message under the following conditions: •	Different baud rates between computer to modem and modem to modem (when flow control is used) •	Data Compression •	Error Correction Example Assume a Byte Timeout of 4, a baud rate of 9600, and Stop Bits of 1. Since 1 byte at 9600 baud requires 0.001 seconds to be transmitted across the communication line, the 3500 Rack Interface Module will signal an end of message in 0.004 seconds. Note: The byte Timeout is primarily for use with a modem. When connecting directly with a serial connection, the default value of 20 is almost always the proper setting. Using higher values may result in Timeout errors being reported by the Rack. Calibrate Channel Lets you move to the interactive channel calibration screen. The user must first have configured and downloaded the monitor options and the configuration options for the monitor and its channels. Because compressor rods are often not 4140 steel it is recommended that the channel be calibrated. This interactive screen allows the user to calibrate the channel more easily using a shaft calibrator and the monitor himself to read the voltage outputs of the Proximitor for specific gaps. The software calculates the Incremental Scale Factors, the maximum allowable linear range, the Scale Factor and the Upper and Lower OK Limits. Reference the 3500 rod position manual for more details on use of the shaft calibrator and channel calibration.

Case Expansion Case expansion is a measurement of the machine casing growth relative to its foundation. During startup of a steam turbine, casing growth is expected. Casing growth is accommodated by two sliding feet on either side of the case that are designed to slide as the case grows. Non-uniform case expansion, commonly known as a cocked case, can occur when a casing foot sticks. This can cause misalignment and casing stress, potentially leading to a rub or excessive vibration. Case expansion measurements are used for indication and annunciation of this condition but are generally not used as an input for automatic turbine shutdown. A cocked case can be detected using two linear variable differential transformers (LVDT) in a dual arrangement. The LVDTs are located on each side of the turbine to observe the sliding feet. Case Sensitive A type of password where upper and lower case letters are significant. For example, the following passwords are all different: password Password PASSWORD CE Approval When this option is enabled, any catalog numbers printed from the configuration software will have a CE mark (flagged for CE approval). Note: “This option has no effect on the TDI or RIMs configuration.” Center Voltage The voltage the channel's transducer would read if the piston were being held in the center of the cylinder clearance. This centered zero position voltage is calculated using the transducer scale factor, the cylinder I.D., the piston-to-cylinder bottom and top clearances, the calculated thermal growth of the piston, and the CF when the rod is at the setup crank angle.

Channel Alert Every channel of a monitor is capable of producing an Alert indication. These Alert indications can be used in relay alarm drive logic which is configured in the Relay Association screen. Channel Bypass The Channel Bypass switch allows a channel of a Monitor, Relay, Keyphasor, or Communication Gateway to be disabled. Checking the Channel Bypass switch will cause the module to indicate a "bypass" status and illuminate the module bypass LED. This feature should be used if you wish to temporarily disable a channel on a module. If the channel is to be permanently turned off, the channel activity on the module options screen should be set to inactive. Channel Bypass State A state that indicates that the functions of the channel are temporarily suppressed Channel Danger Every channel of a monitor is capable of producing a Danger indication. These Danger indications can be used in relay alarm drive logic which is configured in the Relay Association screen. Channel Frequency Support The range of frequency of the input signal that can be input to the channel. This range depends on the type of channel and on certain configuration settings such as Integration. Channel Mapping 1>ALL (Non Standard or CASCADE MODE): The signal processing can be set up so that ONLY channel 1s input voltage is fed to all four channels. This is Cascade Mode. In Cascade Mode the filter mode options are still selected on a channel pair basis. Cascade Mode was designed so that one transducer could be used to provide input to four channels worth of filtering. This allows four separate band pass filter options and four separate full scale ranges to be configured with just one transducers input. Note: Select All Mode before making edit changes, otherwise the selection of All Mode may revert some of your changes back to their original values.

1--->1 (Standard MODE): This is the normal mode of operation for the monitor. In this mode channel 1 input corresponds to channel 1in the monitor. Channel 2 input corresponds to channel 2 in the monitor, channel 3 input corresponds to channel 3 in the monitor and channel 4 input corresponds to channel 4 input in the monitor.

Note: “All mode is not meant as a way of editing 4 channels at one time. If the intention is have the same or very similar settings on 4 independent channels use the copy functions (==> button) to copy 1 channel to its pair mate and one pair to another.” Channel Number Identifies which channel in the module you are configuring. CHANNEL OFFSET A distance aligned with the channel’s transducer that shows how far from ideal center the rod is during setup when the piston is resting on its bottom rider band thickness. A channel offset AWAY means that the rod is further away from the probe face than when at ideal center. A channel offset TOWARD means that the rod is closer to the probe face than when at ideal center.

Channel OK A state that indicates that the channel is operating correctly. For a Complementary Input Differential Expansion channel it is possible for the channel to be above its upper OK voltage and still be operating correctly. Channel Pair Identifies the channel pair you are configuring and also indicates if the pair is active or inactive. Channel Pair Activity/Channel Activity Channel Pair Activity When the Channel Pair Type is Ramp Differential Expansion, Complementary Input Differential Expansion, or Case Expansion - Paired use the Active check box to select whether the channel pair is Active or Inactive. An X in the check box indicates Active.

Channel Activity When the Channel Pair Type is Differential Expansion, Thrust Position and Case Expansion - Single, or Valve Position use the Active check box to select whether the individual channel is Active or Inactive. An X in the check box indicates Active. Channel Pair Type Lets you specify how the channel pair will operate. The following channel pairs are available: 3500/40M Proximitor Monitor Radial Vibration Thrust Position Differential Expansion Eccentricity REBAM 3500/42M Proximitor/ Seismic Monitor Radial Vibration Thrust Position Differential Expansion Eccentricity Acceleration Acceleration 2 Velocity Velocity 2 Circular Acceptance Regions Shaft Absolute Radial Vibration Shaft Absolute Velocity REBAM 3500/44M Aeroderivative GT Vibration Monitor Aero derivative 3500/46M Hydro Monitor Hydro Radial Vibration Hydro Air Gap Hydro Velocity Multimode Hydro Radial Vibration Multimode Air Gap Multimode Hydro Velocity Multimode Acceleration Multimode Thrust Position Radial Vibration Shaft dynamic motion or casing vibration which is measured in a direction perpendicular to the shaft axis, often called lateral vibration.

Thrust Position The average position, or change in position, of a rotor in the axial direction with respect to some fixed reference. Typically, the reference is the thrust bearing support structure or other casing member to which the probe is mounted. The probe may observe the thrust collar directly or some other integral, axial shaft surface, as long as it is within about 305 mm (12 inches) of the thrust bearing.

Differential Expansion The measurement of the axial position of the rotor with respect to the machine casing at some distance from the thrust bearing. Changes in axial rotor position relative to the casing affect axial clearances and are usually the result of thermal expansion during startup and shutdown. The measurement is typically made with a proximity probe transducer mounted to the machine casing and observing an axial surface (for example, collar) of the rotor. The measurement is usually incorporated as part of a Turbine Supervisory Instrumentation system.

Eccentricity Peak to Peak The measurement of shaft bow at slow roll speed. The shaft bow may be due to 1.	fixed mechanical bow 2.	temporary thermal bow 3.	temporary bow due to any sort of sag or bow at rest, sometimes called gravity bow REBAM® It is an acronym for Rolling Element Bearing Activity Monitor. REBAM is a Bentley Nevada methodology for monitoring and analyzing the condition of rolling element bearings using a MicroProx® proximity probe observing the outside surface of the bearing outer race. The signal from the proximity transducer system contains information about rotor related vibration, bearing loading, and bearing condition.

Description Industries worldwide have used Bently Nevada REBAM® technology for over a decade. The previous 7200 REBAM® MicroPROX® System currently operates and observes bearing vibration on a variety of machines. The 3300 REBAM® Transducer System combines the knowledge gathered from those field operations with the advanced design improvements incorporated in our successful 3300 Proximity Transducer System. The REBAM® Transducer System consists of a proximity probe, extension cable and high-gain Proximitor® Sensor called a MicroPROX®. The probe is installed in the bearing housing to observe the outer ring of the bearing. As the rolling elements rotate through the bearing, minute deflections of the outer ring occur as the elements come into contact with bearing defects. Typically, these deflections are in the range of 0.1 to 8 micrometres (4 to 300 microinches). The deflections can be caused by a variety of loading and bearing conditions. The REBAM® Transducer System measures these deflections and provides you with an electrical signal corresponding to the amplitude of the deflection. An increase in amplitude may signify a possible bearing problem, such as rolling element spalling or race defects. Identifying these conditions early leads to safer and more efficient planning of maintenance on the machines. No counterbore is required when using the 3300 REBAM® Transducer System. The sideview effect is greatly reduced, with less than 5% change to the Average Scale Factor when no counterbore is used (this holds for bores used to tap 3/8-24 or M10 x 1 internal threads). A dual channel monitor and a portable field instrument connect to the 3300 REBAM® Transducer System. The 3300/54 Dual REBAM® Monitor provides you with continuous critical protection required for your machinery. The TK-77 is a portable field instrument that can connect either directly to the 3300 MicroPROX® or to the 3300 REBAM® probe and extension cable. It also interfaces directly with the 3300/54 monitor.

Specifications Unless otherwise noted, the following specifications are for a 3300 MicroPROX® Proximitor® Sensor, 3300 REBAM® extension cable and 3300 REBAM® probe +22°C (+72°F) with a -24 Vdc power supply, 10 kΩ, .01μF load and an E52100 steel target at except where noted otherwise. Acceleration 2 Channel Type Multimode Acceleration Channel Type Recipe Acceleration Channel Type A channel that receives a signal from a transducer whose voltage is proportional to acceleration. Multimode Definition Multimode channel types allow the user to configure the monitor for up to 8 machine modes. Possible modes might be forward, reverse, loaded, unloaded, high speed, low speed, etc. The modes are defined by the user. For each mode, the user can configure the monitor to apply different alarm parameters. The parameters include set points enabled/disabled, set point levels and alarm time delays. An alarm delay is provided for each alarm able proportional value. A multimode channel must be told what mode the machine is in. There are 2 ways that this can be performed. One way is through hardware contacts provided by a multimode I/O module. These contacts will only affect the channels in the monitor associated with the I/O module. The second way is through a software command via the 3500 Rack Configuration Software or a Communications Gateway module. This is a group command that can direct multiple monitors to change modes with just one command. Any command to change the monitor to a new mode must be held for 2 seconds before the monitor will react. This is to allow any possible transitory logic driving the mode-change command to settle. Once the monitor reacts to a mode-change command, it will not react to any new mode-change commands for 3 seconds. This is to ensure that peripherals to the monitoring system (System1, Communication Gateways, displays, etc.) have enough time to transition to the previous mode change.Type topic text here. Recip Acceleration Channel Type A channel type supported by the 3500 /70 M Impulse/Velocity Monitor. It is based on the Accel II channel type supported by a 3500 /42 Monitor but with restrictions applicable to its use with a reciprocating compressor. The Channel OK Timed Delay feature is not available on this channel type since its use can mask the detection of certain alarm events associated with Recip applications. Trip Multiply is not available for this channel type. Direct, 1X amplitude, 1X phase angle, 2X amplitude, 2X phase and Bias Voltage proportional values are returned by this channel type. Transducer Selection The sensor selection choice for the Recip Acceleration channel type will be either: 330400, 330425, or a "non-standard" accelerometer sensor. The 330425 has a 50% larger range with 25% of the sensitivity of the 330400. Both are specified to have a 3 dB bandwidth of 10 Hz to 15, 000 Hz. The custom sensor allows setting of the sensitivity and OK limits on the transducer. Timed OK Channel Defeat is grayed out and always Disabled. The user cannot change this. It will be shown grayed out for informational purposes and eliminates a potential for missing certain events common to reciprocating machinery.. The OK Mode can be either Latching or Non-latching. There is no option for dual path. That is, on the second channel of a channel pair the user will not be able to choose “Take Input from Channel 1 (or 3) Transducer”. This channel pair type has been enhanced to allow association to a Recip Multi-Event Wheel as a Keyphasor input. Recip Accel General Information Acceleration measurements are generally made with an Accelerometer and are typically used to evaluate high frequency vibration of a machine casing, crosshead guide, valve cover, or crankcase. Accelerometers are more sensitive to these high frequencies and, therefore, are a better choice than velomitors for monitoring impact events. From a protection viewpoint, the Impulse Accel channel type (in the Enhanced 3500/70M and the original 3500/70M monitor) and the Recip Accel channel type both measure and alarm on the overall (direct) peak value of (user-specified) band-pass filtered acceleration. They differ in the additional data values available from each channel type. The Recip Accel channel type has additional data values of 1X and 2X, whereas the Impulse Accel channel type has crank angle banded alarms. Typical units for acceleration are feet per second per second (ft/s2) pk, meters per second per second (m/s2) pk, or more commonly g pk (= acceleration of gravity = 386.1 in/s2 = 32.17 ft/s2 = 9.81 m/s2). Note that acceleration is a zero to peak (pk) measurement. In a 3500 Monitoring System, Acceleration channels are programmed in pairs. These channels, depending on configuration, typically condition the input signals into various parameters called “proportional values”. Alert setpoints can be configured for each active proportional value and Danger setpoints can be configured for any two of the active proportional values. Application Advisory If housing measurements are being made for overall protection of the machine, thought should be given to the usefulness of the measurement for each application. In order for any housing measurement alone to be effective for overall machine protection, a significant amount of vibration must be faithfully transmitted to the bearing housing or machine casing, or more specifically, to the mounting location of the transducer.In addition, care should be exercised in the physical installation of the transducer. Improper installation can result in a decrease of the transducer amplitude and frequency response and/or the generation of signals which do not represent actual machine vibration.Upon request, Bently Nevada can provide engineering services to determine the appropriateness of housing measurements for the machine in question and/or to provide installation assistance. RMS Checkbox: When RMS is checked, all of the proportional values for the channel will be measured and displayed in RMS units or in peak units if not checked. . RMS or Peak can be reported in English or SI units. . Direct: Machine data using accelerometers for the transducer inputs and generally used for high frequency measurements. The signal will be changed if filtering is selected (High-pass, Low-pass or High-pass and Low-pass selected). Bias Voltage: The DC voltage used by the system as a bias for the transducer. Can be used as a diagnostic tool for evaluating system integrity. Application Advisory: The bias voltage measurement contains no information about the condition of the machinery being monitored. It has been provided only for monitoring system diagnostics. 1X Ampl: In a complex vibration signal, 1X ampl is the notation for the amplitude component that occurs at the rotative speed frequency. 1X Phase Lag: In a complex vibration signal, 1X Phase Lag is the notation for the phase lag component that occurs at the rotative speed frequency. 2X Ampl: In a complex vibration signal, 2X ampl is the notation for the amplitude component having a frequency equal to two times the shaft rotative speed. 2X Phase Lag: In a complex vibration signal, 2X Phase Lag is the notation for the phase lag component having a frequency equal to two times the shaft rotative speed. 2X phase lag is the angular measurement from the leading or trailing edge of the Keyphasor pulse to the following positive peak of the 2X vibration signal. . Velocity 2 Channel Type A channel that receives a signal from a transducer whose voltage is proportional to velocity. Circular Acceptance Regions A circular boundary on a polar plot, which defines acceptable machine operating conditions. The boundary is defined by a configurable CAR Reference Vector and radius. The CAR can define an Alert or a Danger boundary. The Alert and Danger radii are entered as setpoints for the 1x and 2x CAR values.

Shaft Absolute Radial Vibration Shaft dynamic motion which is measured in a direction perpendicular to the shaft axis, also called Shaft Relative vibration. Shaft Absolute Velocity There are two measurements with this channel type, Shaft Absolute Direct and Direct. Direct displays the signal from a transducer whose voltage is proportional to velocity, also known as Bearing Absolute. Shaft Absolute Direct is the vectoral summation of the Shaft Relative and the integrated Bearing Absolute. The result is a displacement measurement representing the vibration of the shaft with respect to free space Aeroderivative Channel Type A channel for monitoring the casing vibration of a gas turbine. The channel accepts input from velocity transducers by using Bently Nevada interface modules 86517 or 86497. The channel uses these inputs to drive alarms. Aeroderivative channels include the following filter options: integration, tracking, and band-pass. Hydro Radial Vibration and Multimode Hydro Radial Vibration Effectively monitors Hydro units at low rotational speeds and acquires data used in warning of the common Hydro units problems (including mechanical/hydraulic/electrical unbalances, rough road zone operation, shear pin failure, misalignment, bearing, and clearance excursions). Hydro Air Gap and Multimode Hydro Air Gap Effectively monitors air gap on salient pole Hydro generators at low rotational speeds and acquires air gap data that is useful in protecting against rotor to stator rubs which can be caused by magnetic imbalance, stator deformation due to thermal or mechanical problems, or loose rotor poles Hydro Velocity and Multimode Hydro Velocity A channel that receives a signal from a transducer whose voltage is proportional to velocity. Setting Hydro Velocity Channel Options The following options determine how a Hydro Velocity channel operates. Reference Information Channel Slot Rack Type Transducer Options Transducer Type Full-Scale Range OK Mode Timed OK Channel Defeat Barriers Note: Barriers are not available at this time. Scale Factor Table OK Limits And Center Gap Voltages Dual Path Input Alarm Options Enable Proportional Values Time Delay Alarm Mode Trip Multiply Channel Frequency Support Signal Conditioning Filter Mode Selection Low and High filtering modes are selectable on a channel pair basis. It is possible to select different filter options on each channel of a channel pair; however, the channels within the pair have to operate in the same filtering mode. Channels 1 and 2 form a pair and channels 3 and 4 form another pair. The two modes of filtering: Low Mode: 4x decimation (0.75Hz to 1375Hz nominal) High Mode: 16x decimation (0.1875Hz to 343.75Hz) High-pass Filter Based on the Channel Frequency Support Selection. This option lets you select a high-pass filter in the range of 0.75 Hz to 100 Hz or 0.1875 Hz to 25 Hz. The selected high-pass filter value defines the 3db point for the 4-pole filter. This filter corner must be at least 5.7 times lower than the low-pass filter corner. Low-pass Filter Based on the Channel Frequency Support Selection. This option lets you select a low-pass filter in the range of 10 Hz to 1375 Hz or 2.5 Hz to 343.75 Hz. The selected low-pass filter value defines the 3db point for the 2-pole filter. This filter corner must be at least 5.7 times higher than the high-pass filter corner. However if the channel is setup for RMS units then the low-pass filter will be in the range of 15 Hz to 1375 Hz or 3.75 Hz to 343.75 Hz. Integration Recorder Options Recorder Output Two mA Clamp Clamp Value Channel Number Identifies which channel in the module you are configuring. Slot The location of the module in the 3500 rack. Modules may be placed in slot numbers 2 through 15. Slot number 2 is immediately to the right of the Rack Interface Module.

Rack Type Identifies the type of 3500 rack being configured -- Standard or Triple Modular Redundant (TMR).

Standard Standard 3500 racks contain non-redundant modules and are used in applications that do not require high availability. The output of standard racks is typically used to display vibration levels on control panels, for machinery diagnostics, and to drive relays that are connected to external devices. A standard rack must have a standard TDI or RIM installed in slot 1.

TMR TMR racks contain redundant modules and are used in applications that require high availability. The output of TMR racks can be used for the same purposes as the output of a standard rack and can be used as an element of a shutdown system. A TMR rack must have a TMR TDI or RIM installed in slot 1 and must use TMR Relay Modules.

Note: 3500/70M Impulse/Velocity, 3500/72M Rod Position, and 3500/77M Cylinder Pressure Monitors are not supported as members of a TMR group but can be used in a TMR rack in Simplex mode. Hydro Velocity and Multimode Hydro Velocity Transducer Types Transducer Type The type of transducer connected to the channel. This selection must agree with the transducer connected to the corresponding channel. If the transducer connected to the 3500 rack is not in the Transducer Selection pull down menu, a custom transducer may be configured. Notes: “Changing Transducer Type may change the available full-scale ranges. If you change Transducer type, you may need to reset Full-Scale Range, Scale Factor, and Alarm Set points. If a Non-Standard transducer has been selected, the set point OK limits are set to plus or minus one volt from the Upper and Lower OK limits that were selected. 330505 Low Frequency Velocity A default scale factor of 508.0 mV/in/s will be selected. This may be adjusted to plus or minus 10%. The type of transducer connected to the channel. This selection must agree with the transducer connected to the corresponding channel. If the transducer connected to the 3500 rack is not in the Transducer Selection pull down menu, a custom transducer may be configured. Refer to the specific manual for addition information. Full-Scale Range The highest and lowest values for the proportional data supplied by the monitor channel. The pull down menu lists the available full-scale ranges for the transducer type that is selected in the Transducer Type field. All proportional data provided by the monitor will be within the selected full-scale range. If the desired full-scale range is not contained in the pull down menu, a "custom" full-scale range may be specified. OK Mode - Acceleration and Velocity Lets you define the operation of the OK status of an Acceleration channel as latching or non-latching. (The Timed OK Channel Defeat option can be enabled only if this option is set to Non-latching.)

Latching The channel will remain in a "Not OK" state after a transducer has returned from a Not OK condition. This mode lets you determine if the transducer has faulted and/or exceeded its OK Limits since the last time the status was checked. To return the channel to an OK state, enable the system reset.

Non-latching When non-latching is selected, the OK state will reflect the current OK status of the transducer.

Timed OK Channel Defeat A feature that defeats the channel when the transducer is in a Not OK state. This feature prevents false alarm indications when the transducer is Not OK. 30 seconds after the transducer returns to an OK state, the channel OK Status will return to an OK state. The OK LED on the front of the monitor will flash at 2 Hz (2 times a second) to indicate that the monitor has been in a Not OK state. This option is available only if the OK Mode is set to Non-latching. NOTE: For vibration monitors configured to alarm on high velocity conditions on a reciprocating machine, it is strongly recommended that you disable the Timed OK / Channel Defeat Option to prevent missed trips. This feature is disabled for Recip - Impulse/Velocity Monitor channels

Barriers Used to limit the power into a hazardous area. Power, common, and signal input wiring typically have barriers in between the monitoring system and the transducer. The barriers field on the channel options screen allows one or more of the following barriers options depending on channel pair type and the transducer type: •	None

•	Internal This option is for use with internal barrier I/O modules. •	External The 3500 Rack Configuration Software will display a specific barrier for a given application. This barrier does not have to be used. In the case of non-standard transducers more than one type of barrier may be acceptable, but the software will only display one. Please refer to the manual for the monitor being used to get appropriate information. •	Galvanic Isolator. A galvanic isolator can be used with a monitor even when the option is not available in the barriers list. In this situation select the 'none' barrier option which will be equivalent to the 'galvanic isolator' option. Hydro Velocity and Multimode Hydro Velocity Scale Factor Table Scale Factor Table -- Hydro Velocity Channels and Multimode Velocity Channels Transducer Factor	Scale Factor No Barrier	MTL 796(-) Zener Ext. 330505 Low Frequency Velocity	508.0 mV/in/s or 20.0 mV/mm/s	NA

Note: Scale Factor may be adjusted plus or minus 10%. Hydro Velocity and Multimode Hydro Velocity OK Limits

OK Limits And Center Gap Voltages -- Hydro Velocity Ch Transducer	Upper OK limits	Lower OK limits	Center Gap Voltage No Barriers (Volts)	Zener Ext. (Volts)	No Barriers (Volts	Zener Ext. (Volts)	No Barriers (Volts)	Zener Ext. (Volts) 330505 -Low Frequency Velocity	-21.00	NA	-3.00	NA	-10.00	NA

Annals and Multimode Hydro Velocity Channels

Dual Path Input This option allows you to use the input from the first channel (channel 1 or 3) for both channels in the channel pair (1/3 or 2/4). The transducer input, OK Mode, and Timed OK Channel Defeat from the first channel (1 or 3) will be copied over to the second channel (2 or 4) in the pair. Enable Proportional Values - Acceleration, Velocity, Impulse Accel, Recip Accel, Recip Velocity, and Multimode Accel Lets you control what type of proportional data is provided by the channel. Check (X) the box immediately to the left of the proportional data identifier to cause the channel to provide the data. If a box does not appear to the left of the identifier, the value is always provided. Direct Data which represents the overall transducer signal. Bias Voltage The DC voltage used by the system as a bias for the transducer. Can be used as a diagnostic tool for evaluating system integrity. Bias voltage is available for the Acceleration II, Velocity II, Recip Accel, Recip Velocity, Multimode Accel, and Impulse Accel channel types. Application Advisory For Bias Voltage This measurement contains no information about the condition of the machinery being monitored. It has been provided only for monitoring system diagnostics. 1X Amplitude In a complex vibration signal, notation for the amplitude component that occurs at the rotative speed frequency. 1X Phase In a complex vibration signal, notation for the phase lag component that occurs at the rotative speed frequency. 2X Amplitude In a complex vibration signal, notation for the amplitude component that occurs at two times the rotative speed frequency. 2X Phase In a complex vibration signal, notation for the phase lag component that occurs at two times the rotative speed frequency. Mode (Multimode Acceleration channel type only) Data which represents the current mode of operation Time Delay The time which a proportional value must remain at or above an alert setpoint level OR outside an alert acceptance region before an alert is declared. You can set time delays for Alert and Danger alarms.

Alert Time Delay You can set the Alert time delay at one-second intervals from 1 to 60* seconds. The Alert (alarm 1) alarm is typically the first level alarm that occurs when the proportional value equals or exceeds the specified set point value. The alert set point values are set on the Set point screen. The Alert set point proportional values for a channel depend on the channel type.

Danger Time Delay You can set the Danger time delay at 500 millisecond intervals from 1 to 60 seconds or for quick shutdown/annunciation at 100 milliseconds (checkbox). The Danger (alarm 2) alarm is typically the second level alarm (trip or shutdown) that occurs when a proportional value equals or exceeds the specified danger set point value. The danger set point values can be set on the Set point screen. Danger set point values for a channel depend on the channel type.

NOTE: “The /46 Hydro Monitor channel types allow a range of 1 to 400 seconds on both the Alert and Danger Time Delay. There is no 100-millisecond option for the /46 Hydro monitor.”

NOTE: “The /44 Multimode Aero channel types allow a range of 1 to 3240 seconds for an ALERT time delay for each PPL, both the standard and the duplicate Value (as in Direct - B). Danger Delays are limited to 1-60seconds and 100msec. This extended time delay is used only for exceptional circumstances and the nominal maximum is 60seconds. A warning message will be issued on a change to alert time delay value if its greater than 60seconds. To utilize this feature the Danger Alarm must be disabled or have a setpoint value higher than the expected Alert alarm level, less the Danger alarm be initiated regardless of the time delay on the Alert.”

Alarm Mode The options for Alarm Mode are Latching and Non-latching. You can set the Alarm Mode option for both the Alert and Danger alarms.

Latching Causes the 3500 monitor to retain an alarm status after the alarm condition has gone away. The latching alarm mode allows you to determine if an alarm setpoint has been exceeded since the last rack reset. The rack reset contact or reset button on the Rack Interface Module will reset all latched alarms in the 3500 rack if the current proportional value is less than the setpoint value. You can also reset the rack by using the Bently Nevada Operator Display Software or through the Communication Gateway module.

Non-latching Causes the 3500 monitor to remove an alarm status after the alarm condition has gone away. The Event list for the monitor will provide information about faulted transducers even if non-latching is selected. Trip Multiply A feature used to temporarily increase the alarm setpoint values by a specific multiple (usually two or three). This function is normally applied by manual action during startup to allow a machine to pass through high vibration speed ranges without monitor alarm indications. Such high vibration speed ranges may include system resonance’s and other normal transient vibrations. This field may be set from 1 to 3 in increments of 0.25. Note: The Hydro Radial Vibration channel allows the field to be set from 1 to 5 in increments of 0.25.

Channel Pair Type Lets you specify how the channel pair will operate. The following channel pairs are available:

3500/45 Position Monitor Differential Expansion Thrust Position Standard Single Ramp Differential Expansion Nonstandard Single Ramp Differential Expansion Dual Ramp Differential Expansion Complementary Input Differential Expansion Case Expansion - Paired Case Expansion - Single Valve Position Differential Expansion The measurement of the axial position of the rotor with respect to the machine casing at some distance from the thrust bearing. Changes in axial rotor position relative to the casing affect axial clearances and are usually the result of thermal expansion during startup and shutdown. The measurement is typically made with a proximity probe transducer mounted to the machine casing and observing an axial surface (for example, collar) of the rotor. The measurement is usually incorporated as part of a Turbine Supervisory Instrumentation system.

Standard Single Ramp Differential Expansion Standard Single Ramp Differential Expansion is a method of measuring Differential Expansion and is a subset of a number of measurement methods, generally termed Ramp Differential Expansion, which make use of ramps to measure axial position. One proximity probe, termed the ramp transducer, observes a ramp and the other probe, termed the flat transducer, observes the shaft. The two probes are mounted on the same side of the rotor and in the same axial plane. The ramp transducer measures axial position and the flat transducer measures radial position. The monitor uses the flat channel Direct proportional value to compensate the ramp channel Direct proportional value for the effect of radial movement. The compensated result is termed the Composite proportional value and is the primary value used for machine protection and machinery management information. Nonstandard Single Ramp Differential Expansion Nonstandard Single Ramp Differential Expansion is a method of measuring Differential Expansion and is a subset of a number of measurement methods, generally termed Ramp Differential Expansion, which make use of ramps to measure axial position. Two proximity probes observe the same ramp. The two probes are mounted on opposite sides of the rotor ( 180 degrees apart). The monitor uses the direct proportional values from both channels to measure axial position and compensate for the effect of radial movement. The compensated result is termed the Composite proportional value and is the primary value used for machine protection and machinery management information.

Dual Ramp Differential Expansion Dual Ramp Differential Expansion is a method of measuring Differential Expansion and is a subset of a number of measurement methods, generally termed Ramp Differential Expansion, which make use of ramps to measure axial position. Two proximity probes observe different ramps. The two ramp sections must be mirror images with the same ramp angle. The two probes mount on the same side of the rotor and in the same axial plane. The monitor uses the direct proportional values from both channels to measure axial position and compensate for the effect of radial movement. The compensated result is termed the Composite proportional value and is the primary value used for machine protection and machinery management information. Complementary Input Differential Expansion Complementary Input Differential Expansion (CIDE) is a method of measuring Differential Expansion. Two proximity probes are mounted and gapped so that the measurement range is twice the range of a single proximity probe. One probe is in its linear range during the first half of the measurement range and the second probe is in range during the second half of the measurement range. The monitor is configured so that it will switch from one probe to the other probe when the gap voltages are at the switch point. The switch point is termed the Cross Over Voltage. The monitor uses the Direct proportional value from each probe to determine the overall expansion value. The overall expansion value is termed the Composite proportional value and it is the value used for machine protection and machinery management information. Case Expansion Channel Pair Type A channel pair whose transducers are used to monitor the machine casing growth, Case Expansion, relative to its foundation.

Considerations - The Case Expansion Channel Pair Type is available on Channel Pair 3 & 4 only of a 45 Monitor. - The same transducer type must be used on each channel of the channel pair. - The channel pair measurement requires both channels of the channel pair to make the composite (differential) measurement. The two LVDT (Linear Variable Differential Transformers) transducers are mounted on both sides of the machine case (see the 3500/45 Operation and Maintenance Manual).

DC LVDT transducers are associated with Position I/O module jumpered for LVDT AC LVDT transducers are associated with the AC LVDT I/O. AC LVDT I/O requires that both channel pairs utilize AC LVDT transducers thus the possible configuration are very limited with Case Expansion available only on channels 3 and 4 with the only possibility for channels 1 and 2 limited to Valve Position. To actually have this choice one must first start by selecting the desired channel pairs and then selecting the I/O of interest followed by the transducers of interest. Case Expansion Channel Type A channel whose transducer is used to monitor the machine casing growth, Case Expansion, relative to its foundation.

Considerations - The Case Expansion Channel Type is available to Channels 3 and 4 only of a 45 Monitor. - The Case Expansion - Single measurement allows options such as full scale range and the transducer type to be configured independently for each channel. This measurement is typically used when only one LVDT (Linear Variable Differential Transformer) is mounted per machine case (refer to the 3500/45 Operation and Maintenance Manual).

DC LVDT transducers are associated with Position I/O module jumpered for LVDT AC LVDT transducers are associated with the AC LVDT I/O. AC LVDT I/O requires that both channel pairs utilize AC LVDT transducers thus the possible configuration very limited with Case Expansion limited to only channels 3 and 4 with the only possibility for channels 1 and 2 limited to Valve Position. To actually have this choice one must first start by selecting the desired channel pairs and then selecting the I/O of interest followed by the transducers of interest. Valve Position Turbine-generator slow roll, acceleration to rated speed, synchronization, and loading can be accomplished with flow controlled by either stop valves or the governor valves. Valve position is a measurement of the position of a valve stem relative to its full stroke length or a measurement of the position of a camshaft relative to its full rotation. Valve position is displayed as a % open or a % closed value. The relative position measured can be based on linear movement or rotational movement. An example of linear movement would be the movement of a valve stem as the valve is opening or closing. This measurement can be made using an AC LVDT. To utilize an AC LVDT device, an AC LVDT I/O module must be used. In order to have that choice available in the Slot I/O list, the channel type selections must first be set to Valve Position for both channel pairs or Valve Position for the first pair and Case Expansion (Single or Paired) for the second channel type. An example of rotational movement would be the rotation of a camshaft that operates cams, which open or close one or more valves. This measurement can be made using a rotary potentiometer. To utilize a rotory Potentiometer, a Rotary Pot Position I/O module must be used. In order to have that choice available in the Slot I/O list, the channel type selections must first be set to Valve Position for both channel pairs.

Channel Type Temperature Channel Type Differential Temperature Channel Type Temperature Channel Type Channel Type is Temperature or Differential Temperature: the only available input to the monitor are temperature measurements.

Channel Type -- Tachometer Rotor Speed Channel Type Rotor Acceleration and Speed Channel Type Zero Speed Channel Type Reverse Rotation Type Rotor Speed Channel Type A channel whose transducer is used to monitor the shaft rotative speed of a machine in revolutions per minute. The channel receives a signal from a transducer whose output frequency is proportional to the speed of a rotor.

Rotor Acceleration and Speed Channel Type A channel whose transducer is used for monitoring the shaft rotative acceleration/deceleration in rpm per minute and speed in revolutions per minute. The channel receives a signal from a transducer whose output frequency is proportional to rotor speed/acceleration.

Zero Speed Channel Type A channel whose transducer is used to monitor the shaft rotative speed of a large rotor machine in revolutions per minute (under 100 rpm) below which the turning gear engagement can safely occur. Continuous shaft rotation during machine shutdown is imperative to prevent shaft bow that could lead to possible machine damage during startup. The channel receives a signal from a transducer whose output frequency is proportional to the speed of a rotor. Reverse Rotation Channel Type A channel whose transducer is used to monitor the shaft rotative speed of a large rotor machine in revolutions per minute (under 100 rpm) below which the turning gear engagement can safely occur. Continuous shaft rotation during machine shutdown is imperative to prevent shaft bow that could lead to possible machine damage during startup. The channel receives a signal from a transducer whose output frequency is proportional to the speed of a rotor. See setting Reverse Rotation Channel Options for setup detail. Channel Type Lets you specify how the channel type will operate. The following channel types are possible: Rod Position - paired (X-Y probes on one throw), Hyper (X-Y probes on one throw), Rod Position - single (single probe on one throw), and Rod Drop (single probe on one throw).

Clamp Value The value a proportional value goes to when that channel or proportional value is bypassed or defeated (For example when a problem occurs with the transducer). The selected value can be between the minimum and maximum full-scale range values. Only the values available from the Recorder Outputs, Communication Gateway and Display Interface Module are clamped to the specified value when the proportional value is invalid. This value can be set independently for all proportional values that have clamps. Class The type of event placed in the System Event List. There are three possible event types:

0 Serious / Fatal Problem A module in the 3500 rack has detected a serious problem which may compromise the monitoring functions. Monitoring functions for the specific module may be inhibited.

1.	Potential Problem A module in the 3500 rack has detected a potential problem. All monitoring functions are still active. 2.	Typical logged event No action is necessary. The event is provided to allow you to track all system related events (entered configuration, module passed self-test, module bypassed, ...). Com Port The connector on the configuring computer used to communicate with the 3500 racks.

Composite Full-Scale Range -- Complementary Input Differential Expansion The Composite full-scale range is the differential expansion measurement range and includes the linear ranges of both transducers connected to the channel pair. The Composite proportional value is returned as the primary value on both channels of the channel pair. Each individual channel also has a Direct proportional value. The Direct full-scale ranges are based on the user entered Composite full-scale range and are one half of the Composite range. The sketch shows the relation of the Composite full-scale range to the two Direct full scale ranges. Note that the zero position for the Direct proportional values is the Cross Over Voltage and the upscale direction for Direct is always toward the probe. The available Composite full-scale ranges are listed in the pull down menu, however, your choices must be compatible with the selected transducer type. If the full-scale range you want is not listed then select Custom and enter the top and bottom values. Comparison The enabled proportional value used to determine how far apart the values of the three monitors in a TMR group can be from each other before an entry is added to the System Event List. Composite Clamp Value This value defines the recorder and Communication Gateway output when the Composite proportional value is invalid. Composite Full-Scale Range The Composite proportional value is calculated from the Direct proportional values from each channel of the channel pair and is the axial position of the rotor after compensation for the effect of radial shift. The Composite proportional value is therefore the differential expansion measurement used for machine protection and for machinery management information. The Composite full-scale range is the only full scale you can set. The full scale ranges for the Direct proportional values of each channel are derived from the user entered Composite range. The available Composite full-scale ranges are listed in the pull down menu, however, your choices must be compatible with the transducer types and ramp angle or the ramp angle will be reset. Click on Allowed Combinations to view compatible selections. If the full-scale range you want is not listed then select Custom and enter the top and bottom values. Composite Range vs. Angle vs. Transducer

Composite Range	11 and 14 mm Allowed Angles	25 and 35 mm Allowed Angles	50 and 50 mm DE Allowed Angles 5 - 0 - 5 mm 2 - 0 - 8 mm 0 - 10 mm	4 to 18	4 to 45	11 to 45 0.25-0-0.25 in 0.15-0-0.35 in 0 - 0.5 in	4 to 15	4 to 45	11 to 45 10 - 0 - 10 mm 5 - 0 - 15 mm 0 - 20 mm	4 to 9	4 to 33	11 to 45 0.5-0-0.5 in 0.25-0-0.75 in 0 - 1.0 in 	4 to 7	4 to 25	11 to 45 25 - 0 - 25 mm 10 - 0 - 40 mm 0 - 50 mm 	not allowed	4 to 12	11 to 28 1.	0 - 0 - 1.0 in 	not allowed	4 to 12	11 to 28 0.5 - 0 - 1.5 in 0 - 2.0 in	-	-	-

Conditioned Keyphasor Signal A digital signal, created by the Keyphasor Module, that is used by monitor modules for speed and phase measurements. The Keyphasor Module creates this digital signal from the Keyphasor transducer signal by using the settings for Threshold and Hysteresis. Config Allowed A check box for controlling whether or not the configuration settings of the 3500 rack can be changed through this Communication Gateway or Third Party Modbus Display port. Config ID A unique six character identifier which is entered when a configuration is downloaded to the 3500 rack. Configurable Registers A list of 500 Configurable Modbus Registers. These are numbered between 45001 to 45500 or 46001 to 47000 depending on what data exists in the registers as well as whether Floating Point is checked or not. Once an Item has been inserted into the list it can be moved to another location by using cut/copy/paste or drag/drop methods. See Mode for more details on modes of insertion.

Note: If an item appears in a gray font, then it has not been enabled with its associated monitor. If an item appears in a red font, then the card that was originally in the rack at the slot location associated with that item is no longer in the virtual rack or has been replaced by some other monitor. Configuring Modbus Registers The Modbus Configurable Registers dialog is available from the /92 Communication Gateway dialog. This topic will explain how to use the Configurable Registers dialog to configure the Modbus configurable registers. The dialog can be split up into three major components:

•	Virtual Rack This virtual rack will provide the ability to retrieve registers from the rack as it is currently configured in rack configuration. Selecting a slot will cause the slot's registers to be displayed in the registers selection tree. Dragging a slot to the registers configuration list will insert all of the slot's registers into the list. •	Register Selection Tree The selection tree will allow individual registers and complete branches of registers to be copied to the configuration list. See the Configuring the Points section below for instructions. •	Register Configuration List The configuration list defines what registers will be used for a configurable section of the modbus map, and the address the registers will have. Available Registers The following data types will be available for use with produced exchanges: •	Module Status •	Channel Status •	PPL (Proportional Value) •	Setregister •	Alert •	Danger Register Selection Tree The selection tree will organize the registers for a slot into branches of channels. Inside each channel branch will be a sub-branch for ppls, and set registers. Inside of the set points branch there will be sub-branches of alert, and danger. Each of these sub-branches will contain all registers of the branch type for that monitor and channel. There is a branch called All Channels that is located before the first channel's branch. This branch will allow the copying of all channel registers for the item selected. For example moving the danger branch would add all danger set registers for all channels to the registers list. Only monitor slots will have the sub-branches described above. The branches content will be dependent on the channel type configured. Module slots should just have status registers available. Configuring the Registers The registers are configured by moving data from the virtual rack, or registers selection tree to the registers configuration list. The following techniques can be used to accomplish this: •	Menu enabled cut, copy, and paste Right-click menus are available from each of the dialog components. The virtual rack, and registers selection tree will have a copy menu option available. Use this to put selected items into a copy buffer. The registers configuration list will have cut, copy, and paste available. Use these options to manipulate the data on the list and add copied data from the virtual rack, and registers selection tree. •	Keyboard enabled cut, copy, and paste The cut, copy, and paste abilities are also available through keyboard controls. Use Control+C to copy. Use Control+X to cut. Use Control+V to paste. •	Drag-drop mouse operations Using the mouse to drag items from the virtual rack, or registers selection tree to the registers selection list allows those items to be copied to the list. Using the mouse to drag items around the registers selection list allows items to be moved from one position on the list to another. The exchange registers can be configured in two modes: Fixed, and Moveable. Each mode will cut, and paste items differently for the registers configuration list. Fixed Mode Configuration When in fixed mode the cut operation will move the selected items to the dialog's clipboard, and replace the selected items with empty registers. When pasting the registers stored on the clipboard will be inserted on the list, overwriting any registers that were previously there. When moving registers using a drag-drop operation the registers will be cut from the original location, and pasted to the address where the mouse was released. Moveable Mode Configuration When in moveable mode the cut operation will move the selected items to the dialog's clipboard, and delete the selected registers from the list. The remaining registers will be moved to fill the positions of the deleted items. When pasting the registers stored on the clipboard will be inserted into the list any items will be moved down to accommodate inserted items. When moving registers using a drag-drop operation the registers will be cut from the original location, and pasted to the relative address from where the mouse was released. The drag-drop operation will cut the selected items which will cause all registers below the selected items to be moved up. The selected registers will then be pasted in at the address where the mouse was released, but adjusted by the number of registers being dragged if the registers originated above the release location. This adjustment is what is meant by relative address. It is often easier to use the x, "Cut" and  v "Paste" keystrokes rather than the mouse for Moveable Mode drag and drop operations on the point list. Floating Point, and Integer configurable register sets

The configurable register list can be displayed with addresses for the floating point values, or the integer values. By default integer values are displayed. Selecting the Floating Point check box will cause the floating point addresses to be displayed.

The floating point configurable registers start at 46001, while the integers start at 45001. Configuring registers on one list will configure the same register on the other list. PPL and set point registers will take up two address spaces in the floating point registers. All register types only take up one address space in the integer registers. 500 registers can be configured, and be made available over Modbus.

NOTE: When PPL or set point is removed from the list in the floating point registers all registers below that point will be have there address decreased by one.

NOTE: Both the integer and floating point registers will always be available through Modbus.

Configuration Fault A status on the Verification or Adjust screens that indicates that the configuration of the rack is not valid. Configuration Identifier - Download A 6-digit (alphanumeric) identifier used to tag 1 or more modules whose configuration will be downloaded. When a rack configuration is uploaded, the Configuration Identifier for each module is also uploaded and may be viewed on each module option screen. Configuration Mode Enabling this switch causes the 3500 module to "go offline" in preparation for a configuration download. This switch can be manually enabled or disabled and is automatically enabled during the download process. The module OK and TX/RX LED's will flash at 1 Hz (once per second) while the module is in the configuration mode.

Configuration Password A case-sensitive password that "gates" configuration information to be downloaded to a 3500 rack. Without this password, the Transient Data Interface/Rack Interface Module will not accept any configuration commands from an external personal computer. Using the Configuration Password The Configuration Password must be specified in order to use the 3500 Rack Configuration Software to download the configuration of a module to the 3500 rack or to adjust setpoints in the 3500 rack. Setting the Configuration Password Enter a Configuration Password by using the module options screen for the Transient Data Interface/Rack Interface Module. The Configuration Password is stored in non-volatile memory within the Transient Data Interface/Rack Interface Module. The password will take effect after the Transient Data Interface/Rack Interface Module configuration is downloaded to the 3500 rack AND the connection to the host personal computer running the 3500 Rack Configuration Software is disconnected from the 3500 rack. Configuration Token A token, maintained by the Transient Data Interface (TDI) or the Rack Interface Module (RIM), that lets only one computer configure a 3500 rack at a time. Whenever you connect to a 3500 rack, the Rack Configuration Software requests the configuration token. The token will not be granted to your computer for the following reasons: •	Another computer has the token. The other computer will release the token when it is disconnected from the rack or if the computer does not communicate with the TDI or RIM in slot 1 for 5 minutes. •	The key lock on the front of the TDI or RIM in slot 1 is set to RUN.

Connecting Rod Length The dimension between the center of the crankshaft journal and the crosshead journal. Constant Pressure The pressure value on one side of a piston that has no significant volume restriction. Typically the constant pressure is ambient pressure. Setup Crank Angle The angular rotation measurement of the crank from when the piston is at top dead center to the point when the Setup Voltage is read.

Cross Over Voltage The cross over voltage (COV) is the gap voltage the monitor uses to switch from one probe to the other and defines which transducer is in range. The in range transducer is the one at, or below, its cross over voltage. A cross over voltage is set on each channel of the channel pair. The cross over voltage also defines the zero position voltage for the Direct proportional value returned by the individual channels. The COV on each channel depends on the Composite full-scale range, transducer scale factor, and the COV setting on the other channel of the pair. The two COVs must be within 0.6 Vdc of one another. To adjust the COV use one of these two methods. •	Enter a value in the text box. •	Click on the Adjust button to enter the Adjust -- Cross Over screen The advantage of the Adjust -- Cross Over screen is that you can see the affect of your adjustment on the output signal as you make your adjustment. Custom Full Scale Range - Temperature When you select a custom full scale range from the pull-down menu, you are able to select the Units, Minimum Range , and Maximum Range for the selected transducer. The custom range is limited by the range supported by the transducer. Temperature Units When you select Custom from the full-scale range pull-down menu, the units pull-down menu becomes available. The menu allows you to select the output units for a custom full-scale range.

Minimum Temperature Range When you select Custom from the full-scale range pull-down menu, the minimum full-scale range text box and its associated spin control are enabled. This allows you to customize the minimum temperature range of the transducer.

Note: There must be a difference of 100 degrees between the custom minimum and the custom maximum of the range.

Maximum Temperature Range When you select Custom from the full-scale range pull-down menu, the maximum full-scale range text box and its associated spin control are enabled. This allows you to customize the maximum temperature range of the transducer.

Note: There must be a difference of 100 degrees between the custom minimum and the custom maximum of the range. Custom Products Modification Use this button when you need to configure a Custom Products Modification. Custom Products configuration data is stored in a Custom Products Modification File. Custom Products Modification Files follow the naming convention . These files must be located in the 3500\RackCfg\Mods directory. When a Custom Products Modification is selected, the purpose and a description of the modification is displayed. Custom Products Modifications are available through the Bentley Nevada Custom Products Division. Contact your local Bentley Nevada Sales Representative for details. Note: Once a modification is installed and saved as part of a rack configuration, any further configuration of modified channels should be performed on the workstation that the modification file was installed on. Uploading a rack configuration to a workstation without the modification and then bringing up the options dialog will cause a warning message to be presented informing the user that the channel has been flagged for a modification. The warning message will identify the modification filename and path and inform the user that default configuration will be loaded. Unless the intention is to undo the modification, the user should OK the message and then cancel out of the channel options and monitor dialogs. The modifcation will remain as it was unless the restored default channel options are downloaded or saved to file. Custom Screens Use these screens to set the full-scale range for a proportional value to a value that is not listed in the drop down list. Cylinder Bore Diameter The measurement of the cylinder internal diameter.

Danger Bypass The Danger Bypass software switch is valid for all 3500 monitors. When this switch is enabled, all danger alarms will be disabled. Enabling this switch will cause a "bypass" status to be indicated and the module bypass LED to be illuminated.

Note: “For Ramp Differential and Case Expansion - Paired, the Channel Bypass switch will only operate on the assigned channel. However, bypassing one channel will cause the Composite proportional value on the other channel in the channel pair to become invalid. The un-bypassed channel will continue to return Gap and Direct (if enabled).” For Complementary Input Differential Expansion, both channels of the channel pair will be bypassed when the Bypass switch is set on either channel in the channel pair. As a result, the System Event list will contain entries for both channels of the pair.

Alarm Drive Logic and Bypassed Channels If a channel has an alarm that is part of AND voting and that channel is bypassed, how the bypassed channel votes depends on the type of AND logic used. Please see the following topics: Normal AND Voting True AND Voting If a channel has an alarm that is part of OR voting and if that channel is bypassed, the bypassed channel votes as false. Normal AND Voting This is the default voting used for a standard four and sixteen channel Relay. With the Normal AND Voting option selected, if a single alarming parameter is Not OK or bypassed (either by user selection or monitor failure), then the parameter will be handled using OR logic in the equation. Basically, the parameter is removed from the relay logic. For example, consider the following instruction: (S05C01A2*S05C03A2) (Slot 5, Channel 1, Danger AND Slot 5, Channel 3, Danger) This instruction ANDs the Channel 1 Danger in Slot 5 with the Channel 3 Danger in Slot 5. If either one of the channels goes Not OK or is bypassed, the equation would be transformed as follows: If Slot 5 Channel 3 Danger goes Not OK, the above equation goes to: (S05C01A2) (Slot 5, Channel 1, Danger) Or, if Slot 5 Channel 1 Danger goes Not OK, the above equation goes to: (S05C03A2) (Slot 5, Channel 3, Danger)

True AND Voting Selecting the True AND Voting option causes alarm logic to use True AND logic for all alarm conditions. Using True AND causes both Not OK and Bypassed parameters to remain in the voting logic equation. The relay operation will depend on the current alarm state of channels in “True AND” voting logic. Note: How the ‘defeat’ option (Timed Ok Channel defeat and Not Ok Channel defeat) are configured for a monitor channel may calso effect the tripping status of ‘True AND’ voting logic.

Caution Care must be taken when selecting this option. If a monitor channel Danger is ANDed with another channel Danger and either one channel or the other is bypassed or Not OK, the relay channel will never trip into alarm. For example, consider the following instruction: Example1: Radial Vibration (S05C01A2*S05C03A2) This instruction ANDs Channel 1 Danger in Slot 5 with the Channel 3 Danger in Slot 5. Should Channel 1 become Not OK or bypassed, but Channel 3 does not, the associated relay channel will fail to alarm. Example2: Velocity (S05C01A2*S05C03A2) This instruction ANDs Channel 1 Danger in Slot 5 with the Channel 3 Danger in Slot 5. Should Channel 1 become Not OK or bypassed, but Channel 3 does not, the associated relay channel will fail to alarm. NOTE: If channel 3 were to be ‘defeated’ the alarm would activate. Example3: Thrust (S05C01A2*S05C03A2) This instruction ANDs Channel 1 Danger in Slot 5 with the Channel 3 Danger in Slot 5. Should Channel 1 become Not OK or bypassed, but Channel 3 does not, the associated relay channel WOULD alarm. The alarming is because a Thrust channel can NOT be ‘defeated’

Data Acquisition (DDE) Server Computer Name The network name of the computer that is running 3500 Data Acquisition software and that is connected to the daisy-chained 3500 racks to be configured. Dynamic Data Exchange (DDE) is a Microsoft Windows communication protocol used to transfer data between applications running on one or more computers. The Data Acquisition Software is a DDE server and is capable of providing machinery data to other applications.

Data Display The portion of Verification or Adjust screens that displays the proportional values of the channel that is listed in the Chan (channel) box.

Date - Event Lists The Date which the System Event was detected.

Default Values -- Test Mode This button is used to set the Test Modes Start RPM and End RPM to their default values.

Direct Frequency Response The supported frequency response for the Direct Peak to Peak value on the Radial Vibration channel type. Frequencies above and below the specified range are attenuated. Direct Frequency Response Hydro RV and Multimode Hydro RV The supported frequency response for the Direct Peak to Peak value on the Hydro Radial Vibration channel type. The upper frequency response is the product of the maximum NX value and the upper cpm range. The lower frequency response is the product of .25 and the lower cpm range. Frequencies above and below the specified range are attenuated.

Direction -- Alarm List Indicates whether the entry in the Alarm List was added because the channel or module entered or left the alarm condition.

Entered The entry in the Alarm List was added because an alarm occurred, a not OK condition occurred, or a relay was driven.

Left The entry in the Alarm List was added because the channel or module is no longer has an alarm condition, a not OK condition, or a driven relay. Direction of Rotation Direction of Crankshaft rotation viewed from driver-end to driven-end. CW-Clockwise rotation; CCW-Counter clockwise rotation.

Disable Front Port Communications on the TDI or RIM This option will disable the front communications port of the Transient Data Interface (TDI) or the Rack Interface Module (RIM) in slot 1. Care should be taken when using this feature as a loss of communications will occur. If a RIM is installed it is recommended that the rear port of the RIM or the 3500/92 Communications Gateway be used when setting this feature. If a TDI is installed it is recommended that the rear port of the TDI be used when setting this feature.

Disabling Trip Multiply in a Display Group To disable Trip Multiply in the group displayed in the Display Group drop-down list box, click the Disable button. To Disable Trip Multiply in all the display groups, click the Disable All button.

Disabling Trip Multiply in a Display Group To disable Trip Multiply in the group displayed in the Display Group drop-down list box, click the Disable button. To Disable Trip Multiply in all the display groups, click the Disable All button. Trip Multiply A feature used to temporarily increase the alarm set point values by a specific multiple (usually two or three). This function is normally applied by manual action during startup to allow a machine to pass through high vibration speed ranges without monitor alarm indications. Such high vibration speed ranges may include system resonance’s and other normal transient vibrations. This field may be set from 1 to 3 in increments of 0.25. Note: The Hydro Radial Vibration channel allows the field to be set from 1 to 5 in increments of 0.25. Discharge Temperature The temperature of the discharge gas under normal operating conditions.

Display Interval The length of time that information is displayed on the Display Unit screen. The time interval can range from 5 to 60 seconds.

Display Time Use the Display Time controls to define the time duration for the Display Unit to return to the previous screen when no user activity has been detected. The display time can range from 30 to 60 minutes. Dual Path Input This option allows you to use the input from the first channel (channel 1 or 3) for both channels in the channel pair (1/3 or 2/4). The transducer input, OK Mode, and Timed OK Channel Defeat from the first channel (1 or 3) will be copied over to the second channel (2 or 4) in the pair.

Dynamic Signal Option The Dynamic Signal Option allows you to specify how data will be provided to the External Dynamic Data Interface (DDIX) or the External Transient Data Interface (TDIX). There are four possible options: Option 1 Provides 3500 Rack slots 2-7 on Port 1 and slots 8-13 on Port 2 on the Data Manager I/O module. Data from slots 14 and 15 would not be available to the data manager. Option 2 Provides 3500 Rack slots 2, 4, 6, 8, 10, and 12 on Port 1 on the Data Manager I/O module. Port 2 is not used. Use this option when individual relays are used for each monitor (that is the rack is organized in a Monitor, Relay, Monitor, Relay, .... format) Option 3 Provides 3500 Rack slots 2, 5, 8, and 11 on Port 1 on the Data Manager I/O module. This option is mainly used in TMR configurations with bussed relays. Option 4 Provides 3500 Rack slots 2, 6, and 10 on Port 1 on the Data Manager I/O module. This option is mainly used in TMR configurations with individual relays. Additionally: “Holding the Shift key while pressing the left mouse button over a module results in a Move (or Cut and Paste) operation. You may then drag the module(s) to the desired slot(s). Holding the Ctrl Key while pressing the left mouse button over a module results in a Copy (or Copy and Paste) operation. You may then drag the module(s) to the desired destination slot(s).” Note: “The Cut, Copy and Paste commands work only with the 3500 Configuration Software package. For example, you cannot Cut or Copy a module and then Paste it into another application.” Ethernet Address A unique identifying number assigned to the network card, to identify the rack on the network at a hardware level. This is a read only parameter.

Enable Voltage Checks This option is available only when configuring a transducer for a Rotor Speed, Rotor Acceleration & Speed, Zero Speed, or Overspeed channel. This check is provided as an additional transducer OK check. When enabled, a Not OK transducer error will occur if the transducer input voltage exceeds the OK Limit. When the Enable Voltage Checks are enabled for one or both the Upper and Lower OK Limits in a Zero Speed or Overspeed Protection monitor, the module can determine the difference between a transducer failure and a stopped machine so that the loss of Trigger will not cause a NOT OK status in a machine stopped situation.

Note: “A typical notch or gear tooth observed by a proximity probe will cause the transducer to fall outside its upper OK limit. Do not enable the Upper OK Limit Voltage Check unless the notch or tooth is specifically designed to remain within the OK limits of the transducer. Enabling Trip Multiply in a Display Group.” To enable Trip Multiply in the group selected in the Display Group drop-down list box, click the Enable button. To enable Trip Multiply for all the groups, click the Enable All button. Note: “You must be connected to the target rack and the group information that is in the rack must be consistent with what you have assigned in the Utility. If the command buttons to enable Trip Multiply for the currently selected group or All groups are grayed out, you must first download the group assignments to the rack.” Older versions of this program worked somewhat differently but did not provide for the file storage of group assignments added in V3.70.

Event Information The description of the event.

Event Name -- Alarm List The type of event that caused the entry to be added to the Alarm List. Alert / Alarm 1 Danger / Alarm 2 Not OK Relay Activated Relay Deactivated

Event Number A number used to lookup the definition of the event. Event Numbers are in the range of 1 to 65535. Event Ratio The ratio of the number of input events per generated output event, when selecting digital processing of an input Keyphasor signal. This option is only available with the 3500/25 Keyphasor module with firmware 2.0 or greater. Digital processing is typically done to achieve a once-per-turn event signal from a multiple-events-per-turn signal source. This is in contrast to Events Per Rev processing, which does not modify the Keyphasor output signal rate produced by the Keyphasor module, relative to the input rate. The Event Ratio is not limited to integer values; it is valid to express fractional values to seven significant decimal digits, with a range of from 0.0000001 through 10000000. Some examples of valid Event Ratios include 0.0003, 47, and 44.9448029. The Event Ratio may be entered as a direct fractional number or expressed as a ratio of two integers in numerator / denominator format. Notes: “Signals from a transducer observing a multi-event per revolution input can be used for speed and amplitude measurements only and not for phase measurements.”

Event Specific All Event Specific (miscellaneous) information is contained in this field.

Event Time The time when the event was detected. Events Per Revolution The integer number of input pulses per shaft rotation when observing an integral multi-event signal source, such as a gear. All Keyphasor modules support this type of event processing, since this information is simply relayed to the individual monitors in a rack, rather than used to modify the Keyphasor signal rate produced by the Keyphasor module. This is in contrast to Event Ratio processing, which does yield an output Keyphasor signal at a modified rate. The Events Per Revolution may be specified as an integer between 1 and 255. Note: “Signals from a transducer observing a multi-event per revolution input can be used for speed and amplitude measurements only and not for phase measurements.” Events per Revolution Lets you set the number of pulses in a transducer signal for each shaft rotation. If the transducer is observing a multi-tooth gear, set the Events Per Revolutions to the number of teeth on the gear. You may enter a decimal value by selecting the Desired EPR option or a fractional value by selecting the EPR Numerator/Denominator option.

Note: “Signals from a transducer observing a multi-tooth gear can be used for speed and amplitude measurements only and not for phase measurements. A fractional value is always calculated and displayed because the Tachometer uses the fractional value in its calculations. If you have entered a decimal value for the EPR, the software will determine which fractional value most closely approximates the decimal value. It will also calculate and display the percentage error between the desired decimal value and the approximated fractional value.”

Events Per Revolution -- Overspeed The number of pulses in a speed transducer signal for each shaft rotation. If the transducer is observing a multi-tooth gear, set the Events Per Revolution to the number of teeth on the gear. The value may be set anywhere from 1 to 255.

Note: “The gear or speed wheel being observed should be rigidly attached to the shaft being monitored for over speed to ensure adequate Over speed Protection.”

External Modem (Rack Interface Module) When the rack is equipped with a RS232/RS422 module, this field lets you identify the external modem connected to the 3500 racks. If the type of modem to be connected is in the drop down list, select the modem from the list, which corresponds to the modem you will connect to the 3500 Rack Interface I/O module. If your modem is not included in the drop down list, Select "Custom" from the list. Enter an initialization string. If necessary, modify the modem setup file. Refer to the Modem File Programming Information in the 3500 Rack Configuration and Utilities Guide (part number 129777-01). External Modem (Transient Data Interface) This field lets you identify the external modem connected to the 3500 racks front port only. If the type of modem to be connected is in the drop down list, select the modem from the list, which corresponds to the modem you will connect to the 3500 Rack. If the type of modem select is the US Robotics 56K then the switch setting needs to be set as follows: Switch 1, 3, 6, 7, and 8 ON Switch 2, 4, and 5 OFF If your modem is not included in the drop down list, Select "Custom" from the list. Enter an initialization string. If necessary, modify the modem setup file. Refer to the Modem File Programming Information in the 3500 Rack Configuration and Utilities Guide (part number 129777-01).

4.	Filter Selection - Dynamic Pressure This field is used to pick the High Pass and Low Pass (-3dB/Half Power) corner frequencies. In Low Mode a High Pass, Low Pass, and Line Frequency (LF) Rejection Filters may be selected. The filter corners must obey a one-octave separation rule. In other words, in Low Mode, an allowable combination of filters would be 25Hz HP, 50 Hz LF Reject, and 100 Hz LP since all filters are at least an octave apart. A non-allowable combination would be a 26Hz HP, 50Hz LF Reject, and 100 Hz LP since the HP filter is not and octave (1/2) below the LF Reject Filter.

5.	Firmware Print Extended Information Button This button will print out extended information about a selected module(s). The information is presented in a text format to the user. The information presented is as follows: The module type, firmware version, and the slot it occupies in the rack 	Monitor Serial Number 	PWA Part Number and Revision 	PWA Modification Part Number and Revision (if any) 	Firmware Part Number and Revision 	I/O Serial Number 	I/O Part Number and Revision 	I/O Modification Part Number and Revision (if any) 	The information can be printed from within the text editor.

Note: “The monitor serial number is checked by the software for validity. If considered invalid, the program will substitute the word "unknown" for the normal hardware part number and revision number. A physical inspection of the board would be necessary to determine those attributes.”

6.	Fixed Mode In fixed mode when the user inserts data into the Configurable Registers list box, all registers from the insert location to register N(number of data items being inserted) are overwritten with the new data.

7.	Movable Mode In movable mode when the user inserts data into the Configurable Registers list box, all registers from the insert location down are adjusted downward by the number of registers being inserted. The same number of registers as were inserted will be dropped off the end of the list of registers.

8.	Floating Point Register data will be displayed using two registers to hold floating-point precision.

Note: “When floating point is selected, all items in the list will be displayed, PPL values and Set point Values will take up 2 floating point registers while status values and empty registers only take up 1 floating point register. The program does not force floating point numbers to start on odd or even boundaries.”

9.	Flow Control Specifies the type of flow control between the personal computer and the 3500 racks. The possible options are none and Hardware (RTS/CTS). For almost all direct applications, select none. For modem applications, select Hardware Flow Control.

10.	Frame Type A descriptor of the physical cylinder arrangement in the structure of the compressor. Frame types include Horizontal, Vertical or V-Type frame. For V-Type frame, proper V-angle (angle between the throws) must be defined to correctly determine the inertial force.

11.	Full Rack vs. Mini Rack The Full Rack or Mini Rack option determines the number of slots available in your rack. If you are using a 3500 Mini Rack then select the Mini Rack (8 slots) option, else use the Full Rack option. If you are using a Mini Rack, the Bulkhead Mounted option is disabled under Rack Mounting Options under either the TDI or RIMs configuration screen.

12.	Full Scale Data Range The value to which the 3500 Communication Gateway or 3500 Third Party Modbus Display will translate the individual channel full scale values.

13.	Example: Assume a monitor channel has a full-scale value of 10 mils and a Full Scale Data Range of 65535. When the monitor channel indicates a value of 10 mils the module will translate this value to 65535.

14.	Full Scale Range The highest and lowest values for the proportional data supplied by the monitor channel. The pull down menu lists the available full scale ranges. All proportional data provided by the monitor will be within the selected full-scale range. Note: The Rod Drop channel type does not have a drop down menu for full scale range. It is determined by the Zero position adjustment as well as all the configuration values selected on the prior configuration page that derive its correction factors.

15.	Full-Scale Range The highest and lowest values for the proportional data supplied by the monitor channel. The pull down menu lists the available full-scale ranges for the transducer type that is selected in the Transducer Type field. All proportional data provided by the monitor will be within the selected full-scale range. If the desired full-scale range is not contained in the pull down menu, a "custom" full-scale range may be specified.

16.	Full Scale Range - Temperature The highest and lowest values for the proportional data supplied by the monitor channel. The pull down menu lists the available full-scale ranges for the transducer type that is selected in the Transducer Type field. All proportional data provided by the monitor will be within the selected full-scale range. If the desired full-scale range is not contained in the pull down menu, a Custom Full Scale Range may be specified by selecting the Custom option from the pull-down menu. With the Differential Temperature channel you are also given the choice to enable the Composite and Differential PPLs. The Composite PPL returns the direct average of the group the channel is in. The Differential PPL returns the Direct of its channel minus the average of the other channels in the group. When the PPL is enabled the Calculated Composite and Differential Ranges will be displayed. The user is given the option to either set the Minimum, Maximum, and the Clamp Value at this time or they can OK-exit and click on the Range Setup button. In the Range Setup screen the user can also enter the ranges, or click on the Set Defaults Button to set the Calculate Composite and Differential Ranges.

17.	Full Scale Range -- Over speed The highest and lowest values for the proportional data supplied by the monitor channel. The full-scale range can be set from 0 to an Upper RPM Limit of 99,999 rpm as long as the input frequency is less than 20 kHz. All proportional data provided by the monitor will be within the selected full-scale range.

Note: “The Peak Speed proportional value defaults to the full-scale range set for the Speed proportional value.” Full Scale Range -- Process Variable

The highest and lowest values for the proportional data supplied by the monitor channel. The Bottom of Scale and Top of Scale allow the user to set the desired full-scale range for the proportional value. The transducer input range is mapped to the selected full-scale range. The top scale value must be greater (more positive) than the bottom scale. Maximum top scale is 20,000 units. 18.	Full Upscale & Downscale Voltage Table - Valve Position Transducer	Full Upscale Voltage	Full Downscale Voltage Rotary Potentiometer	-17.38V	-5.08V +/- .5 in. (13mm) AC LVDT	-14.53V	-7.55V +/- 1 in. (25mm) AC LVDT	-14.76 V	-7.32V +/- 2 in. (50mm) AC LVDT	-15.62V	-6.46V +/- 3 in. (76mm) AC LVDT	-18.49V	-3.59V +/- 4 in. (101mm) AC LVDT	-18.30V	-3.78V +/- 5 in. (127mm) AC LVDT	-17.72V	-4.36V +/- 6 in. (152mm) AC LVDT	-16.20V	-5.88V +/- 10 in. (254mm) AC LVDT	-18.68V	-3.40V

Full Upscale/Downscale Voltage Table -- Case Expansion Transducer	Full Upscale Voltage	Full Downscale Voltage 1in. (25mm) 135613 DC LVDT	6.00 V	1.00 V 2in. (50mm) 135613 DC LVDT	6.00 V	1.00V 4 in. (101mm) 135613 DC LVDT	6.00 V	1.00V 1in. (25mm) 24765 DC LVDT	0.25 V	-2.25 V 2 in. (50mm) 24765 DC LVDT	5.70 V	-5.70 V 4 in. (101mm) 24765 DC LVDT	3.80 V	-3.80 V +/- .5 in. (13mm) AC LVDT	-14.53V	-7.55V +/- 1 in. (25mm) AC LVDT	-14.76 V	-7.32V +/- 2 in. (50mm) AC LVDT	-15.62V	-6.46V

Gap The physical gap measurement (referenced to an electrical zero) for which the voltage reading is desired. Gap Clamp This value defines the Communication Gateway output when the Gap value is invalid. Gap Increment The physical gap increment for which the incremental scale factor has been calculated. This is shown for information purposes only. The user cannot change these increments. The increments are based on the type of transducer selected. Gap Range The full-scale range for the Gap proportional value is 0 to -24 Vdc and is not adjustable.

Group Active You may select whether or not the functions of the Over speed Protection Group will be turned on or off by enabling or disabling this option. Group Options This button is used to launch the Group Options screen, which is used for Configuring an Over speed Protection Group. Group Setup Launches the Group Setup screen where you can put Differential Temperature channels into groups. This button is only available if the Composite PPL is enabled. Temperature - Group Setup Screen This screen allows configuration of Differential Temperature groups. By default each channel is in its corresponding group, eg. Channel 1 is in Group 1, Channel 2 is in Group 2. As channels are added to a group, the Group Average will display how the Composite Proportional Value will be calculated for the group. The Differential shows how the Differential Proportional Value will be calculated for the group. Channels are added are removed from groups by clicking on the corresponding numbered boxes. For example: If channels three and four were added to group 1 - the Composite PPL for channel 1 would be calculated with the following formula: (ch3 + ch4) / 2 - the Differential would use this formula Ch1 - (Ch3 + Ch4) / 2.

Group Voting:

Independent Voting When you select Independent Voting, each Over speed Protection Monitor module in the OPS Group will drive the relays on its Over speed Protection I/O Module independently of the other monitors in the group.

Dependent Voting When you select Dependent Voting, all Over speed Protection Monitor modules in the OPS Group will drive their relays simultaneously if a group-voting criterion is met. For example, in an OPS Group consisting of three over speed Monitors, two out of three modules vote for shutdown. Hardware Status The use of contacts on either the Transient Data Interface (TDI) or the Rack Interface Module (RIM) overrides the Software Trip Multiply state. The Hardware Status is ENABLED using contacts on either the TDI or the RIM. Allows the user to configure the channel with a Custom Products Modification. Custom Products Modification Use this button when you need to configure a Custom Products Modification. Custom Products configuration data is stored in a Custom Products Modification File. Custom Products Modification Files follow the naming convention . These files must be located in the 3500\RackCfg\Mods directory. When a Custom Products Modification is selected, the purpose and a description of the modification is displayed. Custom Products Modifications are available through the Bentley Nevada Custom Products Division. Contact your local Bentley Nevada Sales Representative for details. Note: Once a modification is installed and saved as part of a rack configuration, any further configuration of modified channels should be performed on the workstation that the modification file was installed on. Uploading a rack configuration to a workstation without the modification and then bringing up the options dialog will cause a warning message to be presented informing the user that the channel has been flagged for a modification. The warning message will identify the modification filename and path and inform the user that default configuration will be loaded. Unless the intention is to undo the modification, the user should OK the message and then cancel out of the channel options and monitor dialogs. The modification will remain as it was unless the restored default channel options are downloaded or saved to file. High Read All Channels This option is available only to the Temperature and Process Variable monitor channels types. Selecting HIGH READ ON ALL CHANNELS from the Active Channels / Proportional Values list box allows the configured bar graph to show the highest reading of all active channels in the monitor. Note: all channels should have the same Full-scale range for this function to operate properly.

High Read Channels 1 And 2 / Channels 3 And 4 These options are available only to the Radial Vibration and Velocity monitor channels types. Selecting HIGH READ ON CHANNELS 1 AND 2 or Selecting HIGH READ ON CHANNELS 3 AND 4 from the Active Channels / Proportional Values list box allows the configured bar graph to show the highest reading of either channel in the channel pair.

Hysteresis The voltage level above and below the threshold value which is required to "trigger" the input signal from the transducer. The larger the hysteresis, the greater the immunity to noise on the input signal. When the input signal passes the threshold voltage plus 1/2 of the Hysteresis voltage, the signal goes high. When the input signal returns to the threshold voltage minus 1/2 of the Hysteresis voltage, the signal goes low.

Illustration - Comm. Gateway Module Enter the number of channels whose primary values will be included in the message in this number box. The number in parenthesis indicates the number of channels in the module that have proportional values.

Instantaneous Crossover The value for shaft rotative speed where the direct eccentricity measurement changes from Direct Max/ Direct Min to instantaneous gap. The value for Instantaneous Crossover must be between 1 and 10 rpm.

Integration - Acceleration This option lets you specify whether the direct value will be integrated to velocity.

Integration (checked box) The direct value will be provided in units of in/s or mm/s.

No Integration (cleared box) The direct value will be provided in units of g's or meters per second squared.

Note: “Bentley Nevada recommends filtering out low frequency anomalies, whenever a vibration input is integrated. To filter out low frequency anomalies set the High Pass corner to 10Hz or higher. If integration is used, a machinery specialist should be consulted to determine the appropriate settings for your particular application.” Integration - Shaft Absolute Velocity Integrate the direct value for the channel from velocity to displacement.

Integration (checked box) The direct value will be provided in units of mils or um.

No Integration (cleared box) The direct value will be provided in units of in/s or mm/s.

Note: “Integration is built into the calculation of Shaft Absolute Direct and uses the High Pass and Low Pass filter settings. The same filter settings are used for the optional integration of the velocity value to displacement units Bentley Nevada recommends filtering out low frequency anomalies, whenever a vibration input is integrated. To filter out low frequency anomalies set the High Pass corner to 10Hz or higher. A machinery specialist should be consulted to determine the appropriate settings for your particular application.”

Integration - Velocity Integrate the direct value for the channel from velocity to displacement.

Integration (checked box) The direct value will be provided in units of mils or um.

No Integration (cleared box) The direct value will be provided in units of in/s or mm/s.

Note: “Integration is not allowed if the Velocity channel is in a monitor that is a member of a TMR group, the channel is using any Velomitor transducer and the Slot I/O Type is TMR Bussed.” Bentley Nevada recommends filtering out low frequency anomalies, whenever a vibration input is integrated. To filter out low frequency anomalies set the High Pass corner to 10Hz or higher. If integration is used, a machinery specialist should be consulted to determine the appropriate settings for your particular application.

Integration -- Aero derivative Integrate the direct value for the channel from velocity to displacement. This option applies to 1X Amplitude and Band-pass only.

Integration (checked box) The direct value will be provided in units of mils or um.

No Integration (cleared box) The direct value will be provided in units of in/s or mm/s.

Note: “Bentley Nevada recommends filtering out low frequency anomalies, whenever a vibration input is integrated. To filter out low frequency anomalies set the High Pass corner to 10Hz or higher. If integration is used, a machinery specialist should be consulted to determine the appropriate settings for your particular application. Inter Module Comparison.” When enabled, the current Speed proportional values of each monitor in the OPS group are compared with each other. If the output of one monitor differs from the output of the other monitors in the group by the Comparison percentage setting, that monitor will be declared Not OK. The Comparison percentage allowed is the difference between the middle value of the three monitors in the OPS Group and the individual values of each Over speed monitor.

Note: “This option is available for OPS Groups consisting of three over speed Monitors only.” IP Addresses and Subnet Masks This topic will explain how IP (Internet Protocol) Addresses and Subnet Masks for IP Addresses work in Rack Configuration. IP (Internet Protocol) Address is unique address for an Ethernet network device. The address is a string of 4 numbers each from 0 to 255. For networks managed through an Information Systems (Technologies) department, consult the network administrator for a valid IP address. Note that addresses 0.0.0.0 and 255.255.255.255* are not valid. The following categories of IP addresses are used by 3500: •	Rack IP Address These addresses are used by any 3500 device that provides 3500 protocol support: TDI, RIM, and /92 Communication Gateway. •	Device Source IP Address This type of address is used to support secondary type of access to the 3500 system. Currently the /91 module supports the use of a source IP. •	Destination IP Address This type of address is used to define where data will be sent from the 3500 system. The /91 Communication Gateway supports this. Subnet masks are used to determine what the broadcast destination IP address will be. The broadcast cast address is calculated by inverting the binary representation of the mask. The result is logically 'or'ed to the source IP. For example a source IP of 192.168.1.12 with a mask of 255.255.0.0 will result in a broadcast address of 192.168.255.255. Subnet masks must contain a contiguous block of 1 values in the binary representation of the number starting from the left. For example 255.0.255.0 would not be a valid subnet mask, because all of the 1 values in the binary representation are not contiguous. Subnet masks can also be described as the number of 1 values from starting from the left in the binary representation. For example a mask with an offset of 16 would be equivalent to 255.255.0.0. Rack Configuration does not use these offsets, but they do help understand how subnet masks work. ISF The change in voltage over the gap increment divided by the change in physical gap (gap increment). Key Switch is Changed from Run to Program Mode This option will drive the Rack NOT OK relay if the TDI or RIM key in slot 1 is changed from Run Mode to Program Mode.
 * 255.255.255.255 is not valid for a device's IP address, but it can be used as destination address to broadcast to everything. Most gateways block broadcast messages

Keyphasor Module Association Specifies which Keyphasor Module signal (both primary and backup) will be used to generate all synchronous related proportional values. If "No Keyphasor" is selected then only non-synchronous parameters are available (that is for a Radial Vibration channel only Direct and Gap would be available). NOTE: “The Hydro Radial Vibration channel type does not use a backup Keyphasor and MUST have a primary Keyphasor configured. (e.g. No Keyphasor is not an option).” A requirement for the 3500/22 (TDI) is that all Backup Keyphasors must be the same for a given Primary Keyphasor. For example if Slot 2 Channel 1 has Primary/Upper/Channel 1 and Backup/Upper/Channel 2 and Slot 3 has Primary/Upper/Channel 1 and Backup/Upper/Channel 1 this will flagged as an error and you will not be able to Save or Download any Rack Information. If there is a 3500/20 (RIM) in the rack all Backup Keyphasors should be the same for a given Primary Keyphasor. If this is not the case then it will be flagged as a warning and should be corrected. You will be able to Save or Download the Rack Information. Monitors with Keyphasor associations must be updated at the same time as the Keyphasor when changes are made to either the Events Per Revolution or the Events Ratio fields. When such a change is made and a download is initiated, a warning message will be displayed saying that the virtual and physical keyphasor configurations differ and both the keyphasor and the associated monitors will be marked for download. The user should download both the keyphasor and the monitors to maintain the proper consistency. Failure to do so, could make any speed dependent calculation in the monitors incorrect and could possibly invalidate and alarm detection. Monitor Phase Value Rules When using TDI all monitors that are associated with keyphasor signals must have a valid keyphasor associated. primary/backup keyphasor module association groups must be consistent between monitors. If any monitor is associated to Processed keyphasor signal the monitor's phase values will be disabled. Monitor Phase Alarms Rules Phase alarming is not allowed on monitors associated with a paired keyphasor. The phase accuracy can not be guaranteed during the transistion time period of a potential switch between primary and backup keyphasor which would occur if the primary keyphasor signal became invalid. Therefore, if any monitor is associated to Paired keyphasor signal the monitor's Phase Alarms will be disabled.

Keyphasor Transducer A transducer that produces a voltage pulse for each turn of the shaft, called the Keyphasor signal. This signal is used primarily to measure shaft rotative speed and serves as a reference for measuring vibration phase lag angle. It is an essential element in measuring rotor slow roll bow or run out information. The Keyphasor transducer is typically a proximity probe (recommended for permanent installations in which the probe observes a physical gap change event) or a magnetic pickup. Keyphasor is a Bently Nevada registered trademark. Events Per Revolution The integer number of input pulses per shaft rotation when observing an integral multi-event signal source, such as a gear. All Keyphasor modules support this type of event processing, since this information is simply relayed to the individual monitors in a rack, rather than used to modify the Keyphasor signal rate produced by the Keyphasor module. This is in contrast to Event Ratio processing, which does yield an output Keyphasor signal at a modified rate. The Events Per Revolution may be specified as an integer between 1 and 255. Notes: “Signals from a transducer observing a multi-event per revolution input can be used for speed and amplitude measurements only and not for phase measurements.” Event Ratio The ratio of the number of input events per generated output event, when selecting digital processing of an input Keyphasor signal. This option is only available with the 3500/25 Keyphasor module with firmware 2.0 or greater. Digital processing is typically done to achieve a once-per-turn event signal from a multiple-events-per-turn signal source. This is in contrast to Events Per Rev processing, which does not modify the Keyphasor output signal rate produced by the Keyphasor module, relative to the input rate. The Event Ratio is not limited to integer values; it is valid to express fractional values to seven significant decimal digits, with a range of from 0.0000001 through 10000000. Some examples of valid Event Ratios include 0.0003, 47, and 44.9448029. The Event Ratio may be entered as a direct fractional number or expressed as a ratio of two integers in numerator / denominator format. Notes: “Signals from a transducer observing a multi-event per revolution input can be used for speed and amplitude measurements only and not for phase measurements.” Keyphasor Hysteresis The voltage level above and below the threshold value which is required to "trigger" the conditioned Keyphasor signal. The larger the hysteresis, the greater the immunity to noise on the input signal. When the input Keyphasor signal passes the threshold voltage plus 1/2 of the Hysteresis voltage, the conditioned Keyphasor signal goes high. When the input Keyphasor signal returns to the threshold voltage minus 1/2 of the Hysteresis voltage, the conditioned Keyphasor signal goes low. Keyphasor Information This portion of the verification screen displays keyphasor signal information output by the channel and used in the verification procedure. For more information refer to the Keyphasor Options section in Setting Rotor Speed Channel Options, Setting Rotor Acceleration & Speed Channel Options, Setting Zero Speed Channel Options, Setting Reverse Rotation Channel Options or Setting Over speed Channel Options. Note: “This information is available only to Tachometer (3300/50) and Over speed (3300/53) monitor channel types: Rotor Speed, Rotor Acceleration & Speed, Zero Speed, Reverse Rotation and Over speed.” Keyphasor Module This module (3500/25) is a half height 2 channel Keyphasor card which supplies Keyphasor signals to modules within the 3500 rack.

Keyphasor Orientation The location of the Keyphasor transducer on the machine. The range for the orientation angle is 0 to 180 degrees left or right. Zero degrees is defined as follows:

For horizontal machines Stand at the driver end and look towards the driven end. zero degrees are located at the top (up) of the case; the 180 mark is located at the bottom (down).

For vertical machines Stand at the top of the machine and look down. Zero degrees can be associated with any recognizable physical reference point. Typically this might be set to the direction "North". Rack Signal The Keyphasor signal routed to the backplane of a 3500 rack, for use by the monitors in the rack. The Rack Signal may be either Processed or Non-Processed. Processed Keyphasor Signal A processed Keyphasor signal is one that undergoes a digitally modified rate (i.e., frequency change, either higher or lower) relative to the raw signal coming in from the source transducer. A processed Keyphasor signal can be selected for either the Rack Signal or the Buffered Output signal paths. Non-Processed Keyphasor Signal A Non-Processed Keyphasor signal is one that does not undergo a digitally modified rate (i.e., frequency change, either higher or lower) relative to the raw signal coming in from the source transducer. A Non-Processed Keyphasor signal can be selected for either the Rack Signal or the Buffered Output signal paths.

Keyphasor Threshold The voltage level of the input signal from the Keyphasor transducer where the conditioned Keyphasor signal is triggered. The threshold options are Automatic and Manual. If the expected average running speed of the machine is less than 200 rpm, we suggest that you use Manual threshold. Automatic The Keyphasor trigger voltage is automatically set to a value that is midway between the most positive peak and the most negative peak of the input signal. Manual Set the Keyphasor Threshold voltage during the configuration process. The range of threshold voltages is in increments of 100 mV and depends on the setting for Keyphasor Hysteresis. Conditioned Keyphasor Signal A digital signal, created by the Keyphasor Module, that is used by monitor modules for speed and phase measurements. The Keyphasor Module creates this digital signal from the Keyphasor transducer signal by using the settings for Threshold and Hysteresis. Keyphasor Transducer A transducer that produces a voltage pulse for each turn of the shaft, called the Keyphasor signal. This signal is used primarily to measure shaft rotative speed and serves as a reference for measuring vibration phase lag angle. It is an essential element in measuring rotor slow roll bow or run out information. The Keyphasor transducer is typically a proximity probe (recommended for permanent installations in which the probe observes a physical gap change event) or a magnetic pickup. Keyphasor is a Bently Nevada registered trademark.

Keyphasor Type The type of Keyphasor transducer connected to the Keyphasor I/O Module. The options for Keyphasor type are Proximitor or Magnetic. Proximitor The input Keyphasor signal is from a Proximitor transducer that observes a notch or projection on the shaft. A Proximitor transducer is a Bently Nevada signal conditioning device which sends a radio frequency signal to an eddy current proximity probe, demodulates the probe output, and provides output signals proportional to both the average and dynamic probe gap distances. Also called an oscillator-demodulator. Proximitor® is a Bently Nevada registered trademark. Magnetic The input Keyphasor signal is from a device that senses the passage of a magnetic strip that is attached to the shaft. Last Sequence Number Specifies the last sequence number contained in the event list. Use this number to determine the location of the top of the list.

Latching Relays When this option is selected, the corresponding relay alarm channel will hold the alarm state until it receives a rack reset or the relay is reconfigured.

Latest Events Button Display the most recent events in the list.

Limitations On Alarm Drive Logic For a four-channel relay, no more than 50 instructions can be generated for the entire relay. The amount of instructions that can be accepted by the relay is also dependent on the version number of the relay firmware. Prior to downloading a relay configuration, the version number of the firmware will be checked and it will be determined at that time whether the relay is able to accept the instruction set. Relay firmware with version numbers 2.00 will accept the more complex Relay Alarm Drive Logic equations. Line Frequency - Dynamic Pressure This is a special filter that is designed to remove 50Hz or 60Hz frequencies from the input signal. It provides a minimum of 34dB of attenuation (attenuates to 2% of the incoming magnitude) over 0.5Hz around the center frequency of 50 Hz or 60 Hz. Within 2Hz of the center frequency the signal is back to 98% of the incoming magnitude. This filter will attenuate all incoming signal (noise and real dynamic pressure) within its rejection region.

Line Noise Rejection This setting will identify the line noise frequency to filter on transducer signals. The choices are 50Hz and 60Hz. Select the value corresponding to line frequency of the power grid to which you are connected. If a DC power supply is used to power your 3500 Monitoring System, select 60Hz for the setting. Lower Gap The Lower Gap is determined by picking the least negative voltage within the linear range of the calibration curve. It is the lower value in the range to be used, defines one end of the bar graph, and defines one setpoint limit. Lower Gap Voltage Calculated by the monitor based on the transducer curve generated and the lower gap entered.

Manual Threshold Adjust This switch allows the Manual Threshold to be set from the Configuration software.

Maximum Temperature Range When you select Custom from the full-scale range pull-down menu, the maximum full-scale range text box and its associated spin control are enabled. This allows you to customize the maximum temperature range of the transducer. Note: “There must be a difference of 100 degrees between the custom minimum and the custom maximum of the range.”

Minimum Temperature Range When you select Custom from the full-scale range pull-down menu, the minimum full-scale range text box and its associated spin control are enabled. This allows you to customize the minimum temperature range of the transducer.

Note: “There must be a difference of 100 degrees between the custom minimum and the custom maximum of the range.” Modbus over Ethernet Allows the 3500 system to communicate to a DCS with a Modbus protocol(MBAP) across an Ethernet WAN or LAN.

Mode Allows the user to change how the data is dropped into the Configurable Registers list box. Configuration Settings Fixed Mode Movable Mode Monitor Options Configurable Registers Available Monitors Fixed Mode In fixed mode when the user inserts data into the Configurable Registers list box, all registers from the insert location to register N(number of data items being inserted) are overwritten with the new data.

Movable Mode In movable mode when the user inserts data into the Configurable Registers list box, all registers from the insert location down are adjusted downward by the number of registers being inserted. The same number of registers as were inserted will be dropped off the end of the list of registers.

Monitor Options Displays the PPLs, Setpoints, and Status Data that can be inserted into the Configurable Registers list box for the selected Monitor. The user can select one or more items in the list box. These items can be drag/dropped or copy/paste to the Configurable registers list box. If an item is selected that has sub items, all the sub items are inserted into the list. Note: Any items appearing in a gray font are items that are inactive(i.e. a channel). These items can be inserted into the registers list, but will not display any data though the modbus link while they are still inactive. Configurable Registers A list of 500 Configurable Modbus Registers. These are numbered between 45001 to 45500 or 46001 to 47000 depending on what data exists in the registers as well as whether Floating Point is checked or not. Once an Item has been inserted into the list it can be moved to another location by using cut/copy/paste or drag/drop methods. See Mode for more details on modes of insertion.

Note:” If an item appears in a gray font,. then it has not been enabled with its associated monitor. If an item appears in a red font, then the card that was originally in the rack at the slot location associated with that item is no longer in the virtual rack or has been replaced by some other monitor.” Configuring Modbus Registers The Modbus Configurable Registers dialog is available from the /92 Communication Gateway dialog. This topic will explain how to use the Configurable Registers dialog to configure the Modbus configurable registers. The dialog can be split up into three major components:

•	Virtual Rack This virtual rack will provide the ability to retrieve registers from the rack as it is currently configured in rack configuration. Selecting a slot will cause the slot's registers to be displayed in the registers selection tree. Dragging a slot to the registers configuration list will insert all of the slot's registers into the list. •	Register Selection Tree The selection tree will allow individual registers and complete branches of registers to be copied to the configuration list. See the Configuring the Points section below for instructions. •	Register Configuration List The configuration list defines what registers will be used for a configurable section of the modbus map, and the address the registers will have. Available Registers The following data types will be available for use with produced exchanges: •	Module Status •	Channel Status •	PPL (Proportional Value) •	Set register •	Alert •	Danger Register Selection Tree The selection tree will organize the registers for a slot into branches of channels. Inside each channel branch will be a sub-branch for ppls, and set registers. Inside of the set points branch there will be sub-branches of alert, and danger. Each of these sub-branches will contain all registers of the branch type for that monitor and channel. There is a branch called All Channels that is located before the first channel's branch. This branch will allow the copying of all channel registers for the item selected. For example moving the danger branch would add all danger set registers for all channels to the registers list. Only monitor slots will have the sub-branches described above. The branches content will be dependent on the channel type configured. Module slots should just have status registers available. Configuring the Registers The registers are configured by moving data from the virtual rack, or registers selection tree to the registers configuration list. The following techniques can be used to accomplish this: •	Menu enabled cut, copy, and paste Right-click menus are available from each of the dialog components. The virtual rack, and registers selection tree will have a copy menu option available. Use this to put selected items into a copy buffer. The registers configuration list will have cut, copy, and paste available. Use these options to manipulate the data on the list and add copied data from the virtual rack, and registers selection tree. •	Keyboard enabled cut, copy, and paste The cut, copy, and paste abilities are also available through keyboard controls. Use Control+C to copy. Use Control+X to cut. Use Control+V to paste. •	Drag-drop mouse operations Using the mouse to drag items from the virtual rack, or registers selection tree to the registers selection list allows those items to be copied to the list. Using the mouse to drag items around the registers selection list allows items to be moved from one position on the list to another. The exchange registers can be configured in two modes: Fixed, and Moveable. Each mode will cut, and paste items differently for the registers configuration list. Fixed Mode Configuration When in fixed mode the cut operation will move the selected items to the dialog's clipboard, and replace the selected items with empty registers. When pasting the registers stored on the clipboard will be inserted on the list, overwriting any registers that were previously there. When moving registers using a drag-drop operation the registers will be cut from the original location, and pasted to the address where the mouse was released. Moveable Mode Configuration When in moveable mode the cut operation will move the selected items to the dialog's clipboard, and delete the selected registers from the list. The remaining registers will be moved to fill the positions of the deleted items. When pasting the registers stored on the clipboard will be inserted into the list any items will be moved down to accommodate inserted items. When moving registers using a drag-drop operation the registers will be cut from the original location, and pasted to the relative address from where the mouse was released. The drag-drop operation will cut the selected items which will cause all registers below the selected items to be moved up. The selected registers will then be pasted in at the address where the mouse was released, but adjusted by the number of registers being dragged if the registers originated above the release location. This adjustment is what is meant by relative address. It is often easier to use the x, "Cut" and  v "Paste" keystrokes rather than the mouse for Moveable Mode drag and drop operations on the point list. Floating Point, and Integer configurable register sets

The configurable register list can be displayed with addresses for the floating point values, or the integer values. By default integer values are displayed. Selecting the Floating Point check box will cause the floating point addresses to be displayed.

The floating point configurable registers start at 46001, while the integers start at 45001. Configuring registers on one list will configure the same register on the other list. PPL and setpoint registers will take up two address spaces in the floating point registers. All register types only take up one address space in the integer registers. 500 registers can be configured, and be made available over Modbus.

NOTE: “When PPL or setpoint is removed from the list in the floating point registers all registers below that point will be have their address decreased by one.”

NOTE: “Both the integer and floating point registers will always be available through Modbus.”

Available Monitors A graphical view of all the monitors in the virtual rack. The user can click on a given monitor and the Monitor Options box will display available modbus values for the given monitor. Also the user can drag-drop all modbus options for a given monitor into the configurable registers. Module Alert/Alarm 1 State A status on the Verification or Adjust screens that indicates if any channel in the module has an Alert/ Alarm 1.

Module Bypass A status on the Verification or Adjust screens that indicates if any channel in the module is bypassed

Module Danger/Alarm 2 State A status on the Verification or Adjust screens that indicates if any channel in the module has an Danger/ Alarm 2.

Module is Removed from the Rack This option will drive the Rack NOT OK relay if a module is removed from the rack.

Module OK State A status on the Verification or Adjust screens that indicates that all channels in the module are OK.

Module Reset When the Module Reset (Aux 1) switch is enabled, latched alarms and latched Not OKs are reset. When the Reset Peak Speed with Hardware Reset is enabled in the Overspeed Protection Monitor Options screen, the current Peak Speed reading is cleared as well.

Note: “This functionality for the Aux1 module switch applies to the 3500/53 Over speed Monitor only.”

Monitor Alarm Bypass Enabling this switch disables ALL alarms (alert and danger). Enabling this switch causes a "bypass" status to be indicated and the module bypass LED to be illuminated. Monitor Channel Allows you to assign a monitor channel to an appropriate chamber. Network Device Name Use this parameter to give the rack a name it will be known as on the Network.

New Menu Option Clear the modules from the rack diagram on the Rack Configuration main screen.

Normal AND Voting This is the default voting used for a standard four and sixteen channel Relay. With the Normal AND Voting option selected, if a single alarming parameter is Not OK or bypassed (either by user selection or monitor failure), then the parameter will be handled using OR logic in the equation. Basically, the parameter is removed from the relay logic. For example, consider the following instruction: (S05C01A2*S05C03A2) (Slot 5, Channel 1, Danger AND Slot 5, Channel 3, Danger) This instruction ANDs the Channel 1 Danger in Slot 5 with the Channel 3 Danger in Slot 5. If either one of the channels goes Not OK or is bypassed, the equation would be transformed as follows: If Slot 5 Channel 3 Danger goes Not OK, the above equation goes to: (S05C01A2) (Slot 5, Channel 1, Danger) Or, if Slot 5 Channel 1 Danger goes Not OK, the above equation goes to: (S05C03A2) (Slot 5, Channel 3, Danger)

Normal Thrust Direction Lets you define the normal direction (up scale on a bar graph) as movement "toward" the transducer or "away" from the transducer. If the normal movement of the machine rotor is toward the transducer then "toward" should be selected. Otherwise, select "away". Normally De-energized Relay (NDE) Specifies that the normal (non-alarm) state of the relay is with the coil de-energized. No distinction is made between a non-alarm state and a loss of monitoring. This option is set by using a switch on the Standard Relay I/O module. If the configuring computer is not connected to a rack, this field is empty. TMR Relays cannot be configured as NDE.

Normally Energized Relay (NE) Specifies that the normal (non-alarm) state of the relay is with the coil energized. This configuration errors to shutdown when loss of monitoring occurs. This option is set by using a switch on the Standard Relay I/O modules. If the configuring computer is not connected to a rack, this field is empty. TMR relays are NE and cannot be switched to NDE.

Not OK Channel Pair Defeat Lets you define how the channel pair handles alarming and proportional value reporting when one or both of the channels transition to, or from, a Not OK condition and the transition causes the Channel Pair OK State to change.

Disabled The channel pair will annunciate an Alarm and maintain an Alarm even if the channel pair state is Not OK. Also, the channel pair will continue to report all of the proportional values for the channel pair. After the channel pair returns to the OK state the OK Relay will energize and the OK LED on the front of the monitor will turn on.

Enabled The channel pair will defeat an existing composite Alarm if the Alarm Mode is Non-latching when the channel pair becomes Not OK and will invalidate the Composite and Direct proportional values returned by both channels. When the Not OK channel(s) return to the OK state there will be a 10 second delay before the channel pair returns to normal monitoring. The OK LED on the front panel will turn on and flash at 2 Hz (2 times a second) to indicate the monitor has been Not OK. To stop the OK LED from flashing, enable the system reset. Not OK Channel Pair Defeat cannot be enabled if the OK Mode is Latching.

Number of Events in List Specifies the number of events currently in the list. A maximum of 500 events can be placed in the 3500/20 RIM System Event List and 1000 in the Alarm List. A 3500/22 TDI can nominally support 2048 System Events and 8192 Alarm Events but the actual number varies dependent on memory usuage. Number of Poles The number of generator poles.

Numeric Format The number system that the communication protocol uses to send and receive data. For the Modbus protocol, the system is Hex. NX Value The N value to be used by NX Amplitude and NX Phase. Its range varies by the selection of the Direct Frequency Response. Not OK Channel Pair Defeat Lets you define how the channel pair handles alarming and proportional value reporting when one or both of the channels transition to, or from, a Not OK condition.

Disabled The channel pair will annunciate an Alarm and maintain an Alarm even if one or both channels become Not OK. Also, the channel pair will continue to report all of the proportional values for the channel pair. After the transducer(s) return to the OK state the OK Relay will energize and the OK LED on the front of the monitor will turn on.

Enabled The channel pair will defeat an existing composite Alarm if the Alarm Mode is Non-latching when one or both transducers become Not OK and will invalidate the Composite and Direct proportional values returned by the channel. When the Not OK channel(s) return to the OK state there will be a 10 second delay before the channel pair returns to normal monitoring. The OK LED on the front panel will turn on and flash at 2 Hz (2 times a second) to indicate the monitor has been Not OK.. To stop the OK LED from flashing, enable the system reset. Not OK Channel Pair Defeat cannot be enabled if the OK Mode is Non-latching.

OK Limits The upper and lower voltages that mark the range within which a transducer is defined as OK. The upper OK limit is the more negative voltage for negative voltage transducer (or more positive voltage for positive voltage transducer), and the lower OK limit is the limit closer to zero volts. The Rack Configuration Software supplies a default set of OK limits for each transducer. The monitors use these OK Limits to determine if a transducer is operating within acceptable limits. The incoming transducer voltage is continuously checked against these limits.

OK Mode - Acceleration and Velocity Lets you define the operation of the OK status of an Acceleration channel as latching or non-latching. (The Timed OK Channel Defeat option can be enabled only if this option is set to Non-latching.)

Latching The channel will remain in a "Not OK" state after a transducer has returned from a Not OK condition. This mode lets you determine if the transducer has faulted and/or exceeded its OK Limits since the last time the status was checked. To return the channel to an OK state, enable the system reset.

Non-latching When non-latching is selected, the OK state will reflect the current OK status of the transducer.

OK Mode - Dynamic Pressure Lets you define the operation of the OK status of a Dynamic Pressure channel as latching or non-latching. (The Timed OK Channel Defeat option can be enabled only if this option is set to Non-latching.)

Latching The channel will remain in a "Not OK" state after a transducer has returned from a Not OK condition. This mode lets you determine if the transducer has faulted and/or exceeded its OK Limits since the last time the status was checked. To return the channel to an OK state, enable the system reset.

Non-latching When non-latching is selected, the OK state will reflect the current OK status of the transducer

OK Mode - Temperature a Process Variable or a Gas Detection Lets you define the operation of the OK status of a Temperature a Process Variable or the Gas Detection channel as latching or non-latching.

Latching The channel will remain in a "Not OK" state after a transducer has returned from a Not OK condition. This mode lets you determine if the transducer has faulted and/or exceeded its OK Limits since the last time the status was checked. To return the channel to an OK state, enable the system reset.

Non-latching The OK state will reflect the current OK status of the transducer. The Event list for the monitor will provide information about faulted transducers even if non-latching is selected.

OK Mode -- Complementary Input Differential Expansion Lets you define how the channel pair will handle OK status when the channel pair transitions to, or from, a Not OK state. Note that during normal operation one transducer can be above its upper OK voltage while the other channel is in range. In this case the channel statuses will indicate OK.

Latching The channel pair will remain Not OK after the transducer has returned from a Not OK condition. To return the channel pair to an OK state, enable the system reset. While the channel, or channels, are in the Not OK state the OK LED on the front of the monitor will be off and the OK Relay will be de-energized.

Non-latching The OK state will reflect the current OK status of the channel pair.

OK Mode -- Differential Expansion and Eccentricity Lets you define the operation of the OK status of a Differential Expansion or Eccentricity channel as latching or non-latching. (The Timed OK Channel Defeat option can be enabled only if this option is set to Non-latching.)

Latching The channel will remain in a "Not OK" state after a transducer has returned from a Not OK condition. This mode lets you determine if the transducer has faulted and/or exceeded its OK Limits since the last time the status was checked. To return the channel to an OK state, enable the system reset.

Non-latching The OK state will reflect the current OK status of the transducer.

OK Mode -- Over speed Lets you define the operation of the OK status for the individual over speed Protection Monitor module as latching or non-latching.

Latching The channel will remain in a Not OK state after any channel failure has returned from a Not OK condition. This mode lets you determine if the transducer has faulted and/or exceeded its OK Limits since the last time the rack was reset. To return the channel to an OK state, reset can be accomplished via the individual Over speed reset contact Non-latching The channel will return to an OK state once the Not OK condition is removed. Therefore, the OK state will reflect the current OK status of the channel. OK Mode -- Ramp Differential Expansion Lets you define how the channel pair will handle OK status when one or both of the channels transition to, or from, a Not OK state.

Latching The channel will remain Not OK after the transducer has returned from a Not OK condition. To return the channel to an OK state, enable the system reset. While the channel is in the Not OK state the OK LED on the front of the monitor will be off and the OK Relay will be de-energized.

Non-latching The OK state will reflect the current OK status.

OK Mode -- Thrust Position Lets you define the operation of the OK status of a Thrust Position channel as latching or non-latching.

Latching The channel will remain in a Not OK state after a transducer has returned from a Not OK condition. This mode lets you determine if the transducer has faulted and/or exceeded its OK Limits since the last time the rack was reset. To return the channel to an OK state, enable the system reset.

Non-latching The OK state will reflect the current OK status of the transducer. OK Mode Valve Position Lets you define the operation of the OK status of a Valve Position channel as latching or non-latching. (The Not OK Channel Defeat option can be enabled only if this option is set to Non-latching.)

Latching The channel will remain in a "Not OK" state after a transducer has returned from a Not OK condition. This mode lets you determine if the transducer has faulted and/or exceeded its OK Limits since the last time the status was checked. To return the channel to an OK state, enable the system reset.

Non-latching The OK state will reflect the current OK status of the transducer.

OK Mode -- Case Expansion Lets you define the operation of the OK status of a Case Expansion channel/channel pair as latching or non-latching. (The Not OK Channel Defeat option can be enabled only if this option is set to Non-latching.)

Latching The channel will remain in a "Not OK" state after a transducer has returned from a Not OK condition. This mode lets you determine if the transducer has faulted and/or exceeded its OK Limits since the last time the status was checked. To return the channel to an OK state, enable the system reset.

Non-latching The OK state will reflect the current OK status of the transducer.

OPS Group The slots in the 3500 rack which are occupied by modules in the Over speed Protection System (a group of two or three Over speed monitors).

Options Mode Use this mode to modify module options. To enter this mode, click the Options button on the left margin of the Main Configuration display; "Configure Card Options" will be displayed in the mode box at the bottom of the screen. The various types of 3500 modules use different options screens.

OR Channel Not OK Voting with Overspeed Voting When this option is enabled, either a module Not OK event or an Overspeed event will change the state of the Overspeed alarm.

Over Setpoint A limit that causes an alarm indication when the proportional value is greater than the limit. The type of setpoint that a proportional value has depends upon the type of value. Most proportional values have over setpoints. An example of an over setpoint is the alert alarm on the peak to peak direct value of a Radial Vibration monitor. When the current direct proportional value exceeds the user defined Alert Over Setpoint, the channel will drive an Alert indication.

Overspeed Protection System A highly reliable, machine protection system designed to prevent a prime mover from reaching a high shaft rotative speed that will cause machine damage.

Parity The type of communication verification contained in each message byte. The parity setting within the 3500 Communication Gateway or the Third Party Modbus Display must agree with the setting at the external device connected to the module. Each port may be setup with a different parity setting. The possible values are odd, even, or none.

Phone Number The phone number of the modem for the 3500 rack to be configured Piston Angle The angular rotation in degrees from the Keyphasor reference location to where the piston is at top dead center. Each piston (Throw) has it's own piston angle. Piston Bottom Clearance The measurement in mils from the bottom of the piston to the cylinder I.D. taken while the piston is at rest in the cylinder supported on it's rider band(s). Also, the measurement in mils of the thickness of the rider band, initially. Piston Material The material from which the piston was made. Material can be either cast iron, steel, or aluminum. Piston Rod Diameter The measurement of the piston rod diameter. Piston Rod Length Length from the crosshead pin pivot center to rider band (if only 1) or to center of rider bands (if two or more). Piston Top Clearance The measurement in mils from the top of the piston to the cylinder I.D. taken while the piston is at rest in the cylinder supported by it's rider band(s).

Placing a Channel Into a Group You can place a monitor channel from the Available Monitor Channels list box into the Display Group either by double-clicking it or highlighting it in the list box and clicking the Add Channel button. You may place all the selected monitors channels into the display group by clicking the Add All Channels to Group button. Once channels have been added to the group, they should appear in the Channels in Group list. To actually load the group assignments to the rack, you must either activate the Download Groups command from the utility or download the groups from the Download Configuration screen as part of an overall rack configuration. To save the group assignments to file you can either activate the Write Groups command from the utility or Save to File as part of the standard Save to File feature of Rack Configuration. Error Messages: Virtual Rack and Physical Rack are Inconsistent. When downloading group assignments for a rack to which the program is currently connected to, the program cycles through each group and sends a command to associate each slot/channel selection with its group. If the selected slot and channel is not consistent with the slot and channel in the rack e.g. the rack does not have a monitor in that slot or the module does not support Trip Multiply and Alarm Reset, a warning message will be posted stating that the Virtual (computer memory) and Physical Racks are inconsistent. All consistent assignments will be made to the rack. Similarly on upload, if there is no corresponding slot/channel in the Virtual (computer memory), the assignment will not be shown. There exists a mismatch in Rack File Slot information and the Virtual Rack. When writing groups to or reading groups from a Rack File, the program compares the source group assignment with the target group assignment and disallows the assignment at the target if found to be inconsistent. That is a assignment is not made for a nonexistent channel slot or one that would not support the trip multiply or alarm reset feature. General Note: “It is recommended to upload the Rack Configuration from a rack or file before making changes to its groups. Likewise it is recommended to download a new or significantly modified configuration to a rack or save to a file before making group assignments. If the rack or file configuration relative to number and types of monitors match what is being worked on in the program, these warning messages will not be seen.” Trip Multiply and Reset Utility Download Groups Command This command will update a physical rack with which the program is currently connected to. The program cycles through each group and sends a command to the rack to associate each slot/channel selection with its group. If the selected slot and channel is not consistent with the slot and channel in the rack e.g. the rack does not have a monitor in that slot or the module does not support Trip Multiply and Alarm Reset, a warning message will be posted stating that the Virtual (computer memory) and Physical Racks are inconsistent. All consistent assignments will be made to the rack. Trip Multiply and Reset Utility Write Group Command Will write the current group configurations as displayed in the Group Display pane to an existing rack file. The target rack file should be consistent with the Rack Configuration currently being edited. The normal use of this feature would be to update a reference configuration file with changes made in this utility. At time of Write, checks will be made that the target file has an entry for the particular slot and channel combination specified in each group and that if there is a mismatch as in a non-existing monitor or a channel index or type not supported by the monitor in the rack file, an error stating that there is a mismatch will be generated and that particular group assignment will not be written to file. As a general rule, one should configure the rack with the monitors of choice and save to file or download to rack before going to the Rack Trip Multiply and Reset Utility to make Group assignments. Pole Count Direction This parameter, in conjunction with the Transducer Pole Number, allows the monitor to associate stator wall to pole face air gap measurements to specific poles. Pole count direction is dependant on the normal direction of rotation. Ascending pole order means that the next pole up in front of the probe is identified as the previous pole number plus one. Descending pole order is the opposite.

Sensor Pole Number The Sensor Pole Number uniquely identifies the generator pole that is directly in front of the air gap probe, or is transitioning to that position, at the time the Keyphasor pulse occurs. Identification of the pole is dependant on direction of rotation. Because Transducer Pole Number is related to the Keyphasor you must know the position of the Keyphasor probe relative to what poles are in front of the air gap probe assemblies.

Port 1 -- Third Party Modbus Display The 3500 Third Party Modbus Display contains 1 port on the Display Interface module which can provide machinery information to an external device. External devices may include, but are not limited to, remote displays, programmable logic controller gateways, and PC/workstation based data acquisition systems.

Port 1 / Port 2 The 3500 Communication Gateway contains 2 ports on the I/O module which can provided machinery information to an external device. External devices may include, but are not limited to, remote displays, programmable logic controller gateways, and PC/workstation based data acquisition systems.

Position This option lets you identify if a half height module is in the upper or lower position in a slot. Position applies to half height modules such as the Keyphasor, Power Supply, and TMR Relay Modules.

Primary Keyphasor Specifies the Keyphasor channel which will be used to generate synchronous parameters. (The synchronous parameters for Radial Vibration channels are 1X amplitude/phase, 2X amplitude/phase, Not 1X, and Smax.)

Primary Proportional Value The first proportional value provided by monitors and Keyphasor Modules. Refer to the operation and maintenance manuals for the individual monitor and Keyphasor module to determine which proportional value is the primary value.

Primary Values Lets you specify the number of registers to reserve for the primary proportional values from each slot in the 3500 rack. Typically, these number boxes will be filled with the number of channels for the module in the specified slot. Clicking on "Use Module Defaults" will automatically set each slot to the appropriate number of channels. Defining the Contents of the Comm Gateway Module Registers Registers 30001 to 30488 Modbus (0 to 447 decimal) in the Communication Gateway Module are reserved for the primary proportional values from the monitors and Keyphasor Modules in the 3500 racks. The Communication Gateway screen lets you place these values into contiguous registers so that a Distributed Control System (DCS) computer can scan 3500 racks efficiently. You can reduce the scan time by including only those values required by the DCS computer and excluding the contents of unnecessary or empty registers. All the other data that is available from the monitors and Keyphasor Modules is stored in fixed registers on the Communication Gateway Module. All fixed and programmable registers of the Communication Gateway Module are described in the Communication Gateway Operation and Maintenance Manual (part number 129769-01). To define the contents of the reserved registers, enter integers from 0 to 32 into the number boxes in the columns labeled Positions Reserved. This number indicates the number of channels in the modules whose primary proportional value will be included in the message. Enter 0 to include no values from the module. Enter 4 to include the primary proportional value from all 4 channels in a monitor. Enter a number that is greater then the number shown in parenthesis to insert zeros into the successive registers of the message. Press the Use Module Defaults button to include the primary proportional value from all channels in all modules in the rack that have proportional values available. Primary Proportional Value The first proportional value provided by monitors and Keyphasor Modules. Refer to the operation and maintenance manuals for the individual monitor and Keyphasor module to determine which proportional value is the primary value.

Print Form Send a copy of the current configuration screen to the printer. Print Registers Modbus registers can be printed by using the print... button on the Configurable Registers, and /92 Communication Gateway dialog. The following printing methods are available: •	Modbus Registers •	To Screen This prints the Modbus Register Map to WordPad for editing or document formatting purposes. Saving this to a file after editing is completed within WordPad. •	To Printer Simply prints the Modbus Register Map to a printer. See Print to File topic for additional information on fixed column spacing. •	Modbus Cfg File Save the modbus registers to a file in a tab delimited format. This aids in the configuration of PLC’s, DCS’s, and/or MMI’s. •	Print Form Prints the active configuration screen to a printer. PPL Status The PPL Status order follows the order of the ppls as seen in the verification dialog. For Hydro Radial Vibration this order is Direct, Gap, 1X Ampl, 1X Phase, NX Ampl, NX Phase, Composite. For example if the word came back as 0808 Hex this would mean the fourth proportional value 1X Phase is in danger and alert. Print to File Print to file is an option on the Windows Printer selection Control which will be activated after clicking on the "Print" button. It will be seen as a small check box under the list of printers available. You will then be given a selection of files to choose from including the ability to create a new file. By printing to file, the fixed column format can be maintained which may be lost with the proportional spacing associated with most modern printers. To then print the file to an actual printer, open the file up in a Word Processor such as Word Pad or Note Pad which will typically print the file in a fixed character width spacing. Systems and Alarm Event Printing From the System Events or Alarm Events utilities screen, select "Print" to bring up a print options dialog. Print to file will not be visible on this screen but will be on the actual Windows Dialog after choosing one of the 3 event list selections: Last 20 All Events from N to M and then selecting "Print" The default choice, "Print Event Screen" will only print the dialog screen and will not print to file and the enabling check box will not be seen in the printer selection dialog. Modbus Register Printing It is recommended to print to file and then use Word Pad or NotePad to actually print to a printer. Installed Sensor Thickness The Installed Sensor Thickness is the distance measured from the stator wall and the face of the air gap probe assembly that views the rotor. This measured distance is a function of the probe assembly thickness and the installation process and can therefore vary from one installation to another. The Installed Sensor Thickness should be measured and recorded for each installed air gap probe and then entered in this configuration field for the respective point. Probe Position The distance from the crosshead pin pivot to the probe when the piston is at Top Dead Center (TDC) (at the head end of the cylinder).

Protocol - Comm Gateway The manner in which the 3500 Communication Gateway provides the machinery data. All supported protocols are listed on this pull down menu.

Rack Alarm Inhibit This feature allows all alarms within the 3500 rack to be disabled and is useful when you service and verify your rack. Rack Alarm Inhibit can be invoked in two ways: 1.	Hardware contact on the Rack Interface I/O Module. 2.	Alarm Inhibit under the Utilities menu of the Rack Configuration Software. When Rack Alarm Inhibit is on, all 3500-rack functions, except for alarms, continue to operate. Rack Alarm Inhibit Status A status on the Verification or Adjust screens that indicates if any channel in the rack has Rack Alarm Inhibit enabled. Rack Alarm Inhibit This feature allows all alarms within the 3500 rack to be disabled and is useful when you service and verify your rack. Rack Alarm Inhibit can be invoked in two ways: 1.	Hardware contact on the Rack Interface I/O Module. 2.	Alarm Inhibit under the Utilities menu of the Rack Configuration Software. When Rack Alarm Inhibit is on, all 3500-rack functions, except for alarms, continue to operate. Rack Trip Multiply Status A status on Verification or Adjust screens that indicates if any channel in the rack has Trip Multiply enabled. Ramp Angle There are many varieties of ramp sections on rotors. The sketch shows one type. The ramp angle is entered in degrees and has a resolution of +/- 1/2 degree. Two types of ramp angles can be selected. Standard Ramp Angle This is the normal operating mode. Allowed ramp angles depend on the transducer type and the selected full-scale range. Click on Allowed Combinations to view the allowed combinations. As you change your selections of transducer types and Composite full-scale range the ramp angle may be reset. Custom Ramp Angle If you select this option a popup window will appear and you can enter angles from 4 to 70 degrees regardless of the transducer type or Composite full-scale range selections. You will also have free adjustment range for the zero position voltages. When this option is selected the configuration will not be checked for validity until you click on the OK button. If the configuration is not valid you will be prompted to make changes. Expansion Measurement and Bypassed Channels

Channel Bypass For Ramp Differential Expansion and Case Expansion - Paired channel types Channel Bypass will cause the Composite proportional value returned by the other channel of the channel pair to be Bypassed also. For Complementary Input Differential Expansion Channel Bypass will Bypass both channels of the pair.

Alert Bypass and Danger Bypass If Alert Bypass or Danger Bypass is set on one channel of a channel pair an alarm can still be driven from the other channel if the Composite proportional value set points are exceeded.

Read Time Retrieve the 3500 rack date and time and display it in the Date and Time box. Recorder The recorder option lets you configure the 4 to 20 mA output to be proportional to the Composite full-scale range. The recorder output will be on channel 1 of channel pair (1,2) and channel 3 of channel pair (3,4), no recorder outputs are available on channels 3 and 4. The recorder output current will increase when the Composite proportional value moves upscale.

Recorder Output Lets you select the proportional value of a monitor channel that is sent to the 4 to 20 mA recorder. This option applies only to monitors that have recorders -- Proximitor/Seismic (3500/42M), Aeroderivative (3500/44M), Position (3500/45), Tachometer (3500/50), Overspeed (3500/53), Temperature (3500/61), Dynamic Pressure (3500/64), Rod Position (3500/72M) and the Gas Detection (3500/63) The recorder output is proportional to the measured value over the channel full-scale range. An increase in the proportional value that would be indicated as upscale on a bar graph display results in an increase in the current at the recorder output.

Recorder Output Lets you select the proportional value of a Proximitor/Seismic Monitor channel that is sent to the 4 to 20 mA recorder. Upscale Indication The recorder output is proportional to the measured value over the channel full-scale range. An increase in the proportional value that would be indicated as upscale on a bar graph display results in an increase in the current at the recorder output. Hysteresis Option The proportional values for 1X, 2X and NX (Hydro RV only) Phase also include a hysteresis option. The with Hysteresis option helps prevent the Recorder Output from jumping from full to bottom scale when the phase measurement is near 0 or 359 degrees. with Hysteresis Option When the with Hysteresis option is checked, the recorder signal operates as follows: •	The recorder output is scaled such that 4 mA corresponds to 0 degrees and 20 mA corresponds to 380 degrees (360 plus 20 degrees). •	The transition of a phase measurement that is increasing does not occur until the measurement has gone 20 degrees plus 360 degrees. At this point, the recorder signal switches from 20 mA to a signal that corresponds to 20 degrees or 4.842 mA. •	The transition of a phase measurement that is decreasing occurs at 0 degrees (4 mA). At this point, the recorder signal switches from 4 mA to a signal that corresponds to 360 degrees or 19.158 mA.

Recorder Output Air Gap Lets you select the proportional value of an Air Gap channel that is sent to the 4 to 20 mA recorder. Available options are: None, Average Air Gap, Minimum Air Gap, and Maximum Air Gap.

Upscale Indication The recorder output is proportional to the measured value over the channel full-scale range. An increase in the proportional value that would be indicated as upscale on a bar graph display results in an increase in the current at the recorder output. Reference Temperature The temperatures of the environment when the piston clearance and cylinder bore measurements were taken.

Relay Association -- Overspeed Each over speed Protection I/O Module has four independent relays. The Over speed (Danger) Alarm will always drive Relay 1. You may configure which events will drive Relays 2, 3, and 4. Only one event may be assigned to each relay.

Note: “When OR Channel Not OK Voting with Over speed Voting is enabled for the OPS Group, either an Over speed alarm or a Channel Not OK event can change the state of the Over speed relay.”

Relay NE/NDE Switch Status.

This is a read only field which displays how the relays hardware switches are set on the Over speed Protection I/O Module. This status is only available after the Overspend Protection System configuration has been uploaded.

Relay Switch Displays the current state of the Normally Energized / De-Energized switch on the Standard Relay I/O module. If the configuring computer is not connected to a rack, this field is empty. This option does not apply to TMR Relay Modules. The two switch states are Normally Energized Relay (NE) Normally De-energized Relay (NDE) Reset The Rack Reset will reset all latched alarms, latched Not OKs, and Timed OK Channel Defeats.

Reset Peak Speed on Hardware Reset Allows you to reset the contact on the rear of the Overspend Protection I/O Module to reset latched alarms, latched Not OKs and Peak Speed. When this option is not enabled, Peak Speed can only be reset via a software switch.

Resetting a Group To reset the group displayed in the Display Group drop-down list box, click the Reset Group button in the Reset frame. To reset all display groups, click the Reset All button. Note: You must be connected to the target rack and the group information that is in the rack must be consistent with what you have assigned in the Utility. If the command buttons to reset the currently selected group or All groups are grayed out, you must first download the group assignments to the rack. Older versions of this program worked somewhat differently but did not provide for the file storage of group assignments added in V3.70. Response Times These are read-only fields that display the alarm response times (in milliseconds) for the Alert and Overspend setpoint. The alarm response time is the delay between when the shaft speed exceeds the set point and when the relays are driven to the alarm condition. These response times are dependent upon the alarm set point level and the Events Per Revolution setting.

Note: “The response time does not include relay bounce.”

RPM Clamp Value When a Keyphasor transducer goes invalid, the data provided through the Communication Gateway will be clamped to this value.

RTD (Resistance Temperature Detector) The RTD is a sensor which measures temperature and change in temperature as a function of resistance. It works due to the fact that the resistance of any material to the passage of an electrical current is dependent on its temperature.

Scale Factor The change in output per change in input (sensitivity) of a transducer. This value is typically expressed as millivolts per unit (for example mV / mil for displacement). Scan All Channels This option is available only to the Temperature and Process Variable monitor channels types. Selecting SCAN ALL CHANNELS from the Active Channels / Proportional Values list box allows the configured bar graph to scan through all active channels in the monitor. Note: all channels should have the same Full-scale range for this function to operate properly.

Scan Display Modes The scan mode can be set to display data in Bar graph Mode or with User Defined Sets. Bar graph Mode Bar graph mode will allow eight bar graphs to be configured for the selected set. Each configured bar graph will, once downloaded, be displayed with a graphical representation of the channel\proportional value configured. User Defined Sets A previously configured set.

Scan Mode This option sets the set association display mode (bar graph or text) to scan.

Scan Rack Address(es) This utility option will scan at most 12 connected racks, and search through a maximum of 63 rack addresses of the connected rack(s). Click on the “Start Scan” button to scan through consecutive rack addresses in the range from 1 to 63. If there is no communication from the rack being scanned, the message “No Response” will be displayed for that rack address. Otherwise, the following information will be displayed: Family ID / Member ID / Firmware Version. Either the “Scan Rack Address(es)” or the “Scan Rack Status” tab can be selected while scanning. The Scan Rack Status tab can be selected if at least one rack address is found.

Scan Rack Status The “Scan Rack Status” tab can be selected once the rack(s) have been identified and at least one rack address is found. This utility option allows users to continuously loop through all Found rack addresses to see any change in byte-bit status. For more details, refer to Scan Rack Address(es) in the Help menu. Scan Rack Address(es) This utility option will scan at most 12 connected racks, and search through a maximum of 63 rack addresses of the connected rack(s). Click on the “Start Scan” button to scan through consecutive rack addresses in the range from 1 to 63. If there is no communication from the rack being scanned, the message “No Response” will be displayed for that rack address. Otherwise, the following information will be displayed: Family ID / Member ID / Firmware Version. Either the “Scan Rack Address(es)” or the “Scan Rack Status” tab can be selected while scanning. The Scan Rack Status tab can be selected if at least one rack address is found.

Security Option Descriptions Access Control Options Change Setpoints in Program Mode Only Disable Front Communications Port of TDI/RIM Drive Rack NOT OK Relay Options Rack Address is Changed in Run Mode Module is Removed from the Rack Key Switch is Changed from Run to Program Mode Change Setpoints in Program Mode Only When this option is enabled, setpoints cannot be changed through software without the TDI or RIM key being in Program Mode. Disable Front Port Communications on the TDI or RIM This option will disable the front communications port of the Transient Data Interface (TDI) or the Rack Interface Module (RIM) in slot 1. Care should be taken when using this feature as a loss of communications will occur. If a RIM is installed it is recommended that the rear port of the RIM or the 3500/92 Communications Gateway be used when setting this feature. If a TDI is installed it is recommended that the rear port of the TDI be used when setting this feature. Rack Address is Changed in Run Mode This option will drive the Rack NOT OK relay if the rack address is changed while the TDI or RIM key in slot 1 is in Run Mode. Module is Removed from the Rack This option will drive the Rack NOT OK relay if a module is removed from the rack. Key Switch is Changed from Run to Program Mode This option will drive the Rack NOT OK relay if the TDI or RIM key in slot 1 is changed from Run Mode to Program Mode.

Send Host Date and Time to Rack Allow the current date and time of the computer to be downloaded to the 3500 rack. If this field is "checked", the computer date and time will be downloaded when the "Send" button is pressed.

Send Time Send the Date and Time to the rack based on the following conditions: If the Send Host Date and Time to Rack box is... ...the Send Time command will... not selected 	send the date and time that is shown in the Date and Time box to the rack selected 	send the current date and time of the computer to the rack

Sequence Number A number to identify the location of an event in a list. Sequence numbers begin at 0 and may continue to over 4 billion. The System and Alarm Event lists are filled in a round robin fashion. The System Event List may contain up to 500 entries. The Alarm Event List may contain up to 1000 events.

Set Association Set Selection The current Display Layout set my be selected for viewing and/or editing from the Set Association list box. A maximum of 52 sets are allowed. It is not necessary to configure sets in order, nor do the sets require the same display mode. The number of channel proportional values configured for all sets cannot exceed 416.

Set Names Each set may be assigned a user-defined name. This name may be up to 20 characters in length. To name a set, click on the Enter Set Name button and type the desired name into the text field and then press the Enter key on the keyboard. Display Mode The set displayed in the Set Association list box can be placed into either Bar graph or Text display mode. Note: “Duplicate set names are not allowed.” Text Mode Text Mode will allow 16 text fields to be configured for the selected set. Each configured test field will, once downloaded, be displayed as text representation of the value of the channel\proportional value configured.

Set Button Send the new switch values to the 3500 module.

Set points Enabled Lets you turn the channel set point for a monitor on or off. To enable a set point, check (X) the "enable" box directly below the set point which is to be activated. To disable a set point, clear the box. A set point may only be enabled if the associated proportional value is also enabled. Set points Mode Use this mode to adjust monitor set points. To enter this mode, click the Set points button on the left margin of the Main Configuration display; "Configure Channel Set points" will be displayed in the mode box at the bottom of the screen. The set points to be adjusted depend upon the type of channel and the data available. Alarm Set point - Definition A limit that causes an alarm indication when the proportional value is greater than or less than the limit. The type of setpoint that a proportional value has depends upon the type of value. The two types of setpoint are over and under.

Over Most proportional values have over setpoints. An example of an over setpoint is the alert alarm on the peak to peak direct value of a Radial Vibration monitor. When the current direct vibration value exceeds the user defined alert Over Setpoint, the channel will drive an Alert indication.

Under Some proportional values have under setpoints. An example of an under setpoint is the under alert alarm on the 1X amplitude value of a Radial Vibration monitor. When the current 1X Amplitude vibration value is less than the user defined 1X Alert Under Setpoint, the channel will drive an Alert indication. Signal Conditioning Filter - Dynamic Pressure Low and High filtering modes are selectable on a channel pair basis. It is possible to select different band pass options on each channel of a channel pair; however, the channels within the pair have to operate in the same filtering mode. Channels 1 and 2 form a pair and channels 3 and 4 form another pair. The two modes of filtering provide different qualities of filtering: LOW MODE: (5Hz to 4KHz nominal) Filter Quality: High Pass (HP) 10-pole (200 dB per decade, 60dB per octave) Low Pass (LP) 10-pole (200 dB per decade, 60dB per octave) Fixed Low Pass -78 dB minimum attenuation in the stop band. (LP = NONE) HIGH MODE: (10Hz to 14.75KHz) Filter Quality: High Pass (HP) 6-pole (120 dB per decade, 36dB per octave) Low Pass (LP) -65dB minimum attenuation in the stop band. Fixed (non selectable at 14.75KHz)

Signal Polarity The two settings for Keyphasor Signal Polarity are Notch and Projection.

Notch An output pulse is produced that is triggered by the leading edge of a negative-going pulse of the input signal. This type of pulse is produced by a Keyphasor transducer looking at a notch in the shaft. If a magnetic pickup is used, set the Notch/Projection setting to Notch since in most cases the positive side of the signal will be clipped.

Projection An output pulse is produced that is triggered by the leading edge of a positive-going pulse of the input signal. This type of pulse is produced by a Keyphasor transducer looking at a projection on the shaft.

Slot The location of the module in the 3500 rack. Modules may be placed in slot numbers 2 through 15. Slot number 2 is immediately to the right of the Rack Interface Module.

Slot - Software Switch Use this switch to select a module on which a software switch will be enabled or disabled. When a half height module is selected, you will need to indicate the upper or lower location.

Slot - System Event and Alarm Lists The slot number of the module which has logged the entry in the list. A slot number with an L indicates that half-height module in the lower position caused the error. For example 5L indicates that the event was logged by a half-height module in the lower position in slot 5. A slot number in the 200 range indicates that it is from a display unit attached to a /93 display. For example 213 indicates that the event was logged by a display unit attached to a display in slot 13.

Slot Mode Use this mode to add, remove, or replace 3500 modules in the rack. To enter this mode, click the Slot button on the left margin of the Main Configuration display; "Configure Slot" will be displayed in the mode box at the bottom of the screen. Slot Mode is the default mode of the 3500 Configuration Software.

Slot Inhibit A status on the Verification or Adjust screens that indicates when the alarms have been inhibited by one of the following contacts or switches: •	the Special Alarm Inhibit contact on the monitor I/O module •	the Special Channel Alarm Inhibit Software Switch •	the Rack Alarm Inhibit contact on the Rack Interface I/O Module

Software Status ENABLED when the current display group is in Trip Multiply. Can be ENABLED with the Enable Group button or the Enable All button in the Trip Multiply and Reset screen. If any group is in Trip Multiply, this Software Status will display ENABLED. If no groups are in Trip Multiply, the Software Status will display DISABLED. Special Alarm Inhibit The Special Alarm Inhibit software switch will cause all non-primary alert alarms to be bypassed when enabled. Refer to the operation and maintenance manuals for the monitors in the rack to determine the primary value for a specific channel type. This switch is valid for all 3500 monitors other than the Tachometer (3500/50)and Temperature (3500/60, 3500/61) monitors. Enabling this switch will cause a "bypass" status to be indicated.

Notes: “For Aeroderivative applications, the Special Alarm Inhibit software switch will: •	Inhibit ALL alarms (Alert/Alarm1 and Danger/Alarm2) •	Prevent an invalid Keyphasor from driving the system OK relay to a Not OK state”

For Over speed applications, the Special Alarm Inhibit software switch will inhibit the Trigger OK check for under speed and ALL under alarms. This function is used for machine startup. The Trigger OK Inhibit is edge sensitive and will automatically be removed when the Over speed Protection System has acquired three consecutive valid rpm readings. The Under Alarm Inhibit will automatically be removed when the machine speed exceeds the under set point for the first time. Steady State Rotor Speed Range Use this to select the speed range that covers the steady state operating speed of the unit. The speed range effects the number of poles that can be configured. Stop Bits The number of bits which will be added to each Communication Gateway or Third Party Modbus Display message. Each byte within a message will contain 1 start bit, 8 data bits, and either 1 or 2 stop bits. The Stop Bits setting within the module must agree with the setting at the external device connected to it. Each Communication Gateway or Third party Modbus Display port may be setup with a different Stop Bits setting. The possible values are 1 and 2. Stroke The maximum distance that the piston travels as the crankshaft rotates full revolution. Maximum excursions are at piston top dead center and bottom dead center. Subnet Mask String used to mask against the IP Address. In the form of 255.255.0.0, 255.255.255.0 etc... Suction Temperature The temperature of the suction gas under normal operating conditions.

Supply Conditioned Keyphasor A conditioned Keyphasor signal is a digital timing signal that is used by a monitor module to measure vector parameters. The 3500 Tachometer monitor module can supply conditioned Keyphasor signals to the 3500 system back plane for use by other monitor modules. Channel 1 of the Tachometer will drive Upper Keyphasor Channel 1. Channel 2 of the Tachometer will drive Upper Keyphasor Channel 2. Enable this option by checking (X) the Supply Conditioned Keyphasor check box.

Target/Example IP Address and Subnet Mask Allows the user to enter an IP address of a rack located on a different subnet, than the computer running the Config software. This is used in conjunction with the Target subnet mask. If the subnet mask is left blank or all 255s, then the Address added to the list is the exact address in the Target/Example IP Address; this will send a browse request directly to the specified rack. Other wise the subnet mask is used to determine an address to browse using the IP Address. Example: If the IP Address is 10.10.51.19 and the Subnet mask is 255.255.255.255 then the address added to the list of addresses is 10.10.51.19; which will send a browse request only to the address 10.10.51.19. If the Subnet mask is 255.255.0.0 which is the actual subnet mask on the subnet which contains 10.10.51.19, the address added to the list is 10.10.255.255; which will send a browse request to all IP Addresses on that subnet.

TC (Thermocouple) Also known as a thermoelectric thermometer, the TC (thermocouple) is a temperature-sensing device comprised of two dissimilar metals wires which produce a proportional change in electrical potential at the point where they join when thermally affected (heated or cooled).

Test Mode The Test Mode (Aux 2) switch is used by the 3500/53 Over speed Monitor only. When enabled, the Over speed Test Mode function is invoked. The module will remain in test mode as long as the switch is enabled. Only one module in an Over speed Protection Group may be in test mode at any time.

Threshold Type The voltage level of the input signal from the transducer where triggering occurs. The threshold options are Automatic and Manual. If the expected average running speed of the machine is less than 200 rpm, Manual threshold is suggested.

Automatic The Keyphasor trigger voltage is automatically set to a value that is midway between the most positive peak and the most negative peak of the input signal. Auto threshold requires a minimum signal amplitude of 1V pp and a minimum frequency of 0.0167 Hz.

Manual The trigger threshold is set by the user during the configuration process. The range of threshold voltages is +10.0 to -23.0 volts. Manual threshold requires a minimum signal amplitude of 500mV pp. Throw Identifies the throw that is being configured. Throw Type A descriptor of how many cylinders are in a throw. Throw types include 1 Cylinder or 2 Cylinders. Each cylinder consists of two chambers. Thrust, Multimode Thrust and Differential Setpoint Types Proportional Value 	Available Setpoints Over 	Under Direct 	x 	x Gap 	x 	x

Transducer Type The type of transducer connected to the channel. This selection must agree with the transducer connected to the corresponding channel. If the transducer connected to the 3500 rack is not in the Transducer Selection pull down menu, a custom transducer may be configured.

Time Delay The time which a proportional value must remain at or above an alert setpoint level OR outside an alert acceptance region before an alert is declared. You can set time delays for Alert and Danger alarms. Alert Time Delay You can set the Alert time delay at one-second intervals from 1 to 60* seconds. The Alert (alarm 1) alarm is typically the first level alarm that occurs when the proportional value equals or exceeds the specified set point value. The alert set point values are set on the Set point screen. The Alert set point proportional values for a channel depend on the channel type. For more information see Adjusting Monitor Set points and Set point Configuration Danger Time Delay You can set the Danger time delay at 500 millisecond intervals from 1 to 60 seconds or for quick shutdown/annunciation at 100 milliseconds (checkbox). The Danger (alarm 2) alarm is typically the second level alarm (trip or shutdown) that occurs when a proportional value equals or exceeds the specified danger setpoint value. The danger setpoint values can be set on the Setpoint screen. Danger setpoint values for a channel depend on the channel type. For more information see Adjusting Monitor Setpoints. Time Delay The time which a proportional value must remain at or above an alert setpoint level OR outside an alert acceptance region before an alert is declared. You can set time delays for Alert and Danger alarms.
 * NOTE: The /46 Hydro Monitor channel types allow a range of 1 to 400 seconds on both the Alert and Danger Time Delay. There is no 100-millisecond option for the /46 Hydro monitor.
 * NOTE: The /44 Multimode Aero channel types allow a range of 1 to 3240 seconds for an ALERT time delay for each PPL, both the standard and the duplicate Value (as in Direct - B). Danger Delays are limited to 1-60seconds and 100msec. This extended time delay is used only for exceptional circumstances and the nominal maximum is 60seconds. A warning message will be issued on a change to alert time delay value if its greater than 60seconds. To utilize this feature the Danger Alarm must be disabled or have a setpoint value higher than the expected Alert alarm level, less the Danger alarm be initiated regardless of the time delay on the Alert.

Alert Time Delay You can set the Alert time delay at one-second intervals from 1 to 60 seconds. The Alert (alarm 1) alarm is typically the first level alarm that occurs when the proportional value equals or exceeds the specified setpoint value. The alert setpoint values are set on the Setpoint screen. Alert setpoints can be set for all the proportional values for a channel.

Danger Time Delay You can set the Danger time delay at 500 millisecond intervals from 1 to 60 seconds. The Danger (alarm 2) alarm is typically the second level alarm (trip or shutdown) that occurs when a proportional value equals or exceeds the specified danger setpoint value. The danger setpoint values can be set on the Setpoint screen. Danger setpoints can be set for any two of the available proportional values for a channel. The Aeroderivitive two channel type has an additional 100 millisecond interval for the 1X amplitude ppl. If this is checked, the 1X amplitude ppl alarming will be set to both 100 millisecond danger and one second Alert alarming. Time Delay - Temperature & Process Variable The time which the direct proportional value must remain at or above an alert setpoint level OR outside an alert acceptance region before an alert is declared. You can set time delays for Alert and Danger alarms at one-second intervals from 1 to 60 seconds. The Alert (alarm 1) alarm is typically the first level alarm that occurs when the proportional value equals or exceeds the specified. The Danger (alarm 2) alarm is typically the second level alarm (trip or shutdown) that occurs when a proportional value equals or exceeds the specified danger setpoint value. Alarm setpoints can be set for the Direct proportional value for a channel in the setpoint configuration screen. Danger Time Delay You can also set the Danger time delay at a millisecond interval that varies from 380 to 810 milliseconds, depending on the number of active channels. The millisecond danger interval is determined as follows: 270ms minimum time + (90ms x number of active channels)

Timed OK Channel Defeat A feature that defeats the channel when the transducer is in a Not OK state. This feature prevents false alarm indications when the transducer is Not OK. 30 seconds after the transducer returns to an OK state, the channel OK Status will return to an OK state. The OK LED on the front of the monitor will flash at 2 Hz (2 times a second) to indicate that the monitor has been in a Not OK state. This option is available only if the OK Mode is set to Non-latching. NOTE: For vibration monitors configured to alarm on high velocity conditions on a reciprocating machine, it is strongly recommended that you disable the Timed OK / Channel Defeat Option to prevent missed trips. This feature is disabled for Recip - Impulse/Velocity Monitor channels

Timed OK Channel Defeat - Acceleration A feature that defeats the channel when the transducer is in a Not OK state. This feature prevents false alarm indications when the transducer is Not OK. 30 seconds after the transducer returns to an OK state, the channel OK Status will return to an OK state. The OK LED on the front of the monitor will flash at 2 Hz (2 times a second) to indicate that the monitor has been in a Not OK state. This option is available only if the OK Mode is set to Non-latching. NOTE: For vibration monitors configured to alarm on high acceleration and/or velocity conditions on a reciprocating machine, it is recommended that you disable the Timed OK / Channel Defeat Option to prevent missed trips. This feature is disabled for Impulse Accel channels Timed OK Channel Defeat - Dynamic Pressure A feature that defeats the channel when the transducer is in a Not OK state. This feature prevents false alarm indications when the transducer is Not OK. 30 seconds after the transducer returns to an OK state, the channel OK Status will return to an OK state. The OK LED on the front of the monitor will flash at 2 Hz (2 times a second) to indicate that the monitor has been in a Not OK state. This option is available only if the OK Mode is set to Non-latching. Timed OK Channel Defeat -- Air Gap and Multimode Air Gap A feature that defeats the channel when the transducer is in a Not OK state. This feature prevents false alarm indications when the transducer is Not OK. Thirty seconds after the transducer returns to an OK state, the channel OK Status will return to an OK state. The OK LED on the front of the monitor will flash at 2 Hz (2 times a second) to indicate that the monitor has been in a Not OK state. Transducer Calibration Data Typically the cylinder pressure transducer is supplied with two points of calibration data that describe the transducer ouput voltage at two different pressure levels. These fields allow you to enter individual transducer calibration data. Transducer Direction Lets you define the normal direction (up scale on a bar graph) as movement "toward" the transducer or "away" from the transducer. If the normal movement of the machine rotor is toward the transducer then "toward" should be selected. Otherwise, select "away". Transducer Jumper Status The position of the transducer jumper on the Proximitor/Seismic I/O Module. This field is automatically filled by the configuration software after an upload from the 3500 rack. If the configuration is not uploaded from the rack, this field will be N/A.

Transducer OK Comparison Used for Zero Speed or Reverse Rotation monitoring only, this option allows you to enable an additional check for the dual transducer input. This check requires that the two inputs be within a configurable percentage (1-10% of the full scale range) of one another before driving a zero speed alarm, in Zero Speed channel type, or speed alarm, in Reverse Rotation channel type.

Note: “This check is disabled below 1 rpm.”

Transducer Orientation The physical position of the transducer on the shaft. The orientation is specified as 0 to 180 degrees left or right. Zero degrees is defined as follows:

For horizontal machines Stand at the driver end and look towards the driven end. zero degrees are located at the top (up) of the case; the 180-degree mark is located at the bottom (down).

For vertical machines Stand at the top of the machine and look down. Zero degrees can be associated with any recognizable physical reference point. Typically this might be set to the direction "North". Note: “Temperature and Process Variable channels use this field for documentation purposes only; operation of the monitoring system is not affected by the transducer orientation settings. It is not necessary to change this field in temperature and process variable channels.” Transducer Orientation Air Gap The angular location of the probe on the stator wall. The range for orientation angle is 0 to 180 degrees left or right as observed from the driver to the driven end of the machine train. Transducer Voltage The voltage the channel's transducer reads when the piston is at the setup crank angle and is at rest in the cylinder on its initial rider band thickness (bottom clearance). Trigger Angle The angular measurement from the crankshaft position wheel index notch's left edge (CCW rotating crankshaft) or right edge (CW rotating crankshaft) to the position at which the instantaneous measurement will be taken. (This only applicable to Rod Drop channel type configurations that have a Keyphasor).

Trip Multiply A feature used to temporarily increase the alarm set point values by a specific multiple (usually two or three). This function is normally applied by manual action during startup to allow a machine to pass through high vibration speed ranges without monitor alarm indications. Such high vibration speed ranges may include system resonance’s and other normal transient vibrations. This field may be set from 1 to 3 in increments of 0.25. Note: The Hydro Radial Vibration channel allows the field to be set from 1 to 5 in increments of 0.25.

True AND Voting Selecting the True AND Voting option causes alarm logic to use True AND logic for all alarm conditions. Using True AND causes both Not OK and Bypassed parameters to remain in the voting logic equation. The relay operation will depend on the current alarm state of channels in “True AND” voting logic. Note: How the ‘defeat’ option (Timed Ok Channel defeat and Not Ok Channel defeat) are configured for a monitor channel may also effect the tripping status of ‘True AND’ voting logic.

Caution: Care must be taken when selecting this option. If a monitor channel Danger is ANDed with another channel Danger and either one channel or the other is bypassed or Not OK, the relay channel will never trip into alarm. For example, consider the following instruction:

Example1: Radial Vibration (S05C01A2*S05C03A2) This instruction ANDs Channel 1 Danger in Slot 5 with the Channel 3 Danger in Slot 5. Should Channel 1 become Not OK or bypassed, but Channel 3 does not, the associated relay channel will fail to alarm. Example2: Velocity (S05C01A2*S05C03A2) This instruction ANDs Channel 1 Danger in Slot 5 with the Channel 3 Danger in Slot 5. Should Channel 1 become Not OK or bypassed, but Channel 3 does not, the associated relay channel will fail to alarm. NOTE: If channel 3 were to be ‘defeated’ the alarm would activate. Example3: Thrust (S05C01A2*S05C03A2) This instruction ANDs Channel 1 Danger in Slot 5 with the Channel 3 Danger in Slot 5. Should Channel 1 become Not OK or bypassed, but Channel 3 does not, the associated relay channel WOULD alarm. The alarming is because a Thrust channel can NOT be ‘defeated’.

Normal AND Voting This is the default voting used for a standard four and sixteen channel Relay. With the Normal AND Voting option selected, if a single alarming parameter is Not OK or bypassed (either by user selection or monitor failure), then the parameter will be handled using OR logic in the equation. Basically, the parameter is removed from the relay logic. For example, consider the following instruction: (S05C01A2*S05C03A2) (Slot 5, Channel 1, Danger AND Slot 5, Channel 3, Danger) This instruction ANDs the Channel 1 Danger in Slot 5 with the Channel 3 Danger in Slot 5. If either one of the channels goes Not OK or is bypassed, the equation would be transformed as follows: If Slot 5 Channel 3 Danger goes Not OK, the above equation goes to: (S05C01A2) (Slot 5, Channel 1, Danger) Or, if Slot 5 Channel 1 Danger goes Not OK, the above equation goes to: (S05C03A2) (Slot 5, Channel 3, Danger) Two mA Clamp An option that forces the channel recorder to 2 mA when the corresponding proportional value is invalid. When this option is not selected, the recorder will clamp to the value specified in the clamp value field. Under Setpoint A limit that causes an alarm indication when the proportional value is less than the limit. The type of setpoint that a proportional value has depends upon the type of value. Some proportional values have under setpoints. An example of an under setpoint is the under alert alarm on the 1X amplitude value of a Radial Vibration monitor. When the current 1X Amplitude vibration value is less than the user defined 1X Alert Under Setpoint, the channel will drive an Alert indication. Units Specifies which standard of units (English or International Standard) is used in entering the configuration and for displaying the proportional values. Upper and Lower Keyphasor The upper Keyphasor module is the Keyphasor module in the top Keyphasor slot. The lower Keyphasor module is the Keyphasor module in the bottom Keyphasor slot. Each 1/2 slot may contain up to two Keyphasor channels.

Upper Gap The Upper Gap is determined by picking the most negative voltage within the linear range of the calibration curve. It is the upper value in the range to be used, defines one end of the bar graph, and defines one setpoint limit. Upper Gap Voltage Calculated by the monitor based on the transducer curve generated and the upper gap entered.

Upper RPM Limit Lets you set a full-scale range for the Keyphasor rpm provided by a channel. The rpm data provided by the channel will be scaled between 0 and this upper RPM Limit.

Upscale Direction Lets you specify whether upscale on a bar graph represents movement "toward" the transducer or "away" from the transducer. If the thermal growth or expansion of the machine rotor is toward the transducer, select "toward". Otherwise, select "away".

Upscale Direction -- Case Expansion Lets you specify whether machine case movement toward or away from the transducer corresponds to positive case expansion. For example, if the Upscale Direction is set to Towards Transducer, then as the machine case moves toward the transducer, the case expansion Direct proportional value will increase and go upscale on a bar graph. Upscale Direction -- Ramp Differential Expansion and Complementary Input Differential Expansion The upscale direction is referenced to channel 1 of channel pair (1,2) or channel 3 of channel pair (3,4).Upscale Direction lets you define whether upscale on the Composite bar graph represents movement toward the probe or away from the probe.

Use Module Defaults Include the primary proportional value from all channels in all modules in the rack that have proportional values available.

User Defined Sets A previously configured set. Valve Position Full-Scale Range The highest and lowest values for the proportional data supplied by the monitor channel. The pull down menu lists the available full-scale ranges for the transducer type that is selected in the Transducer Type field. All proportional data provided by the monitor will be within the selected full-scale range. Valve Stroke Displacement Lets you specify the stroke length (linear travel of the AC LVDT core/extension rod, or angular rotation of a rotary transducer) that will correspond to 0 to 100% open or closed.

Velocity High-pass Filter This option that lets you select a high-pass filter in the range of 3 to 400 Hz. The selected high-pass filter value defines the 3db point for the 4-pole filter. This filter corner must be at least 5.7 times lower than the low-pass filter corner.

Velocity Low-pass Filter This option that let’s you select a low-pass filter in the range of 20 to 3000 Hz. The selected low-pass filter value defines the 3db point for the 2-pole filter. This filter corner must be at least 5.7 times higher than the high-pass filter corner.

Velomitor Internal Barrier I/O (Barrier Seismic I/O) An Input/Output module, located in the slot directly behind the monitor module, providing intrinsically safe power connections for four channels of Velomitor transducers and accepting four intrinsically safe inputs to be connected directly a 3500/42M Monitor or a 3500/70M. Note that this I/O type requires that both channel pairs be configured for Velocity.

Vibration Transducer Interface: Description The Vibration Transducer Interface (VTI) is a galvanic isolation solution provided by GE’s Bently Nevada product line. With the use of galvanic isolation, an earth ground is not required in the hazardous area. Isolating transformers used in the galvanic isolation technique provide a physical barrier to prevent high voltages from being transferred from the safe area to the hazardous area. The safe area and hazardous area are isolated from each other, and can have two separate grounding points without the possibility of ground loops occurring. The Vibration Transducer Interface has been designed, engineered, and manufactured by Measurement Technology Limited to our design specifications. The Vibration Transducer Interface incorporates three-port isolation. The transducer, monitor, and power supply circuits each have separate grounding points, since the three circuits are isolated from each other. Therefore, +24 Vdc plant power, with its own ground, can be used to provide power to the Vibration Transducer Interface without creating ground loops. With the use of our1800/10 power supplies, 110 Vac or 220 Vac can also be used to power the Vibration Transducer Interface. Two power supplies can be installed in one housing The following Bently Nevada transducer systems can be used with the Vibration Transducer Interface: • 3300 XL Proximity Transducer System • 3300 5 mm/8 mm Proximity Transducer System • 7200 5 mm/8 mm Proximity Transducer • PROXPAC_ • 330400 Accelerometer • Accelerometer Interface Module (part number 23733-03) • Aeroderivative Interface Module (part number 86517) • 3300 REBAM_ MicroPROX_ Proximity Transducer System • 7200 REBAM MicroPROX Proximity Transducer System

Specifications and Ordering Information The following Bently Nevada monitors can be used with the Vibration Transducer Interface: • 3500/25 Keyphasor_ Monitor • 3500/40 Proximitor_ Monitor • 3500/42 Proximitor /Seismic Monitor • 3500/44 Aeroderivative Monitor • 3500/45 Differential Expansion/ Thrust Position Monitor • 3500/50 Tachometer Monitor • 3500/53 Overspeed Protection System • 3300/16 Dual Vibration Monitor • 3300/20 Dual Thrust Monitor • 3300/25 Dual Accelerometer Monitor • 3300/26 Dual Accelerometer RMS Monitor • 3300/50 Tachometer • 3300/52 Reverse Rotation Monitor • 3300/53 Overspeed Protection System • 3300/54 Dual REBAM Monitor • 3300/61 Dual Vector Monitor • 3300/81 Six-channel Rod Drop Monitor • 3300/95 Aeroderivative Filter Module/Vibration Monitor • 2201/02 System Monitor • 2201/03 Four-channel PLC Monitor • 2201/06 Low Speed Machine Monitor

Voltage The voltage in Vdc associated with the entered gap value. Set the shaft calibrator micrometer to the gap as shown and enter the voltage by typing in the value or by having the monitor read and record the value by using the Auto Read button.

Voltage Input External Termination An Input/Output module, located in the slot directly behind the monitor module, that allows you to use a multiconductor cable to connect the I/O module to an external termination block. This I/O module supports voltage proportional inputs from -10 Vdc to +10 Vdc.

Voltage Input Internal Termination An Input/Output module, located in the slot directly behind the monitor module, that allows the transducer field wiring to be connected directly to the rear of the rack. This I/O module supports voltage proportional inputs from -10 Vdc to +10 Vdc. Weight of Crosshead and Crosshead Pin Weight of crosshead and crosshead pin assembly. When SI unit is selected, it represents mass. Weight of Piston and Rod Assemblies Weight of Piston and Rod assembly including weight of Tail Rod if exists. For a two-cylinder throw, include the weight of second piston and rod assembly. When SI unit is selected, it represents mass. with Hysteresis Option When the with Hysteresis option is checked, the recorder signal operates as follows: •	The recorder output is scaled such that 4 mA corresponds to 0 degrees and 20 mA corresponds to 380 degrees (360 plus 20 degrees). •	The transition of a phase measurement that is increasing does not occur until the measurement has gone 20 degrees plus 360 degrees. At this point, the recorder signal switches from 20 mA to a signal that corresponds to 20 degrees or 4.842 mA. •	The transition of a phase measurement that is decreasing occurs at 0 degrees (4 mA). At this point, the recorder signal switches from 4 mA to a signal that corresponds to 360 degrees or 19.158 mA.

Word Swapped IEEE byte ordering. A 32-bit number with the first 16 bits swapped with the last 16 bits.

Sensor Pole Number The Sensor Pole Number uniquely identifies the generator pole that is directly in front of the air gap probe, or is transitioning to that position, at the time the Keyphasor pulse occurs. Identification of the pole is dependant on direction of rotation. •	Because Transducer Pole Number is related to the Keyphasor you must know the position of the Keyphasor probe relative to what poles are in front of the air gap probe assemblies.

Zero Position -- Direct The transducer voltage corresponding to the nominal DC shaft position. The voltage specified will correspond to the zero point for the Direct proportional value on the user display. To use the Adjust feature, you must be connected to the rack AND the configuration in the 3500 rack must match the configuration in your computer. You can adjust Zero Position two ways: •	entering the voltage in the Zero Position box on channel option screens •	clicking on the Adjust button and entering the voltage in the Ref Volts box on the Adjust -- Zero Reference screen The advantage of using the Adjust -- Zero Reference screen is that you can see the affect of your adjustment on the output signal as you adjust the voltage.

Zero Position -- Gap Specifies the transducer voltage corresponding to the nominal DC shaft position. This parameter may be specified only when gap is configured with mil or micrometer units. The voltage specified will correspond to the zero point on the user display. To use the Adjust feature, you must be connected to the rack AND the configuration in the 3500 rack must match the configuration in your computer. You can adjust Zero Position two ways: •	entering the voltage in the Zero Position box on channel option screens clicking on the Adjust button and entering the voltage in the Ref Volts box on the Adjust -- Zero Reference screen The advantage of using the Adjust -- Zero Reference screen is that you can see the affect of your adjustment on the output signal as you adjust the voltage. Zero Position Setup The mils corresponding to the nominal DC shaft position. The voltage corresponding to the mils specified will equate to the zero point on the user display. To use the Adjust feature, you must be connected to the rack AND the configuration in the 3500 rack must match the configuration in your computer. You can adjust Zero Position in two ways: Entering the Volts in the Zero Position box on the channel option screens Clicking on the Adjust button and entering the mils (voltage) in the Ref Mils box on the Adjust -- Zero Reference screen. The advantage of using the Adjust -- Zero Reference screens is that you can see the affect of your adjustment on the output signal as you adjust the mils/voltage. Zero Position Range Displayed The range in mils allowed for the ZP setting will be shown.

Zero Position Voltage -- Flat Transducer The transducer gap voltage which will cause the Direct proportional value for the channel to read zero on a bar graph display or in the current values box. The ZPV typically corresponds to the probe gap voltage at cold rotor zero setting. The ZPV for the flat transducer is set at the center gap voltage and depends only on the transducer type. The adjustment range for the ZPV is normally limited to +/- 0.65 Vdc, however, if you select a Nonstandard transducer the adjustment range is increased. To adjust the ZPV use one of these two methods: •	Enter a value in the text box. •	Click on the Adjust button to enter the Adjust -- Zero Reference screen The advantage of the Adjust -- Zero Reference screen is that you can see the affect of your adjustment on the output signal as you make your adjustment. Zero Position Voltage The transducer gap voltage which will cause the Direct proportional value for the channel to read zero on the bar graph display or in the current values box. The zero position voltage (ZPV) typically corresponds to the probe gap voltage at cold rotor zero setting. The ZPV depends on the ramp angle, Composite full-scale range, and transducer type. When you change these parameters the ZPV will change. The adjustment range for the ZPV is normally limited to +/- 0.65 Vdc, however, if you select Custom Ramp Angle, a Custom Composite Full-Scale Range, or a Nonstandard transducer then the adjustment range is increased. To adjust the ZPV use one of these two methods. •	Enter a value in the text box. •	Click on the Adjust button to enter the Adjust -- Zero Reference screen The advantage of the Adjust -- Zero Reference screen is that you can see the affect of your adjustment on the output signal as you make your adjustment.

Zero Speed Channel Type A channel whose transducer is used to monitor the shaft rotative speed of a large rotor machine in revolutions per minute (under 100 rpm) below which the turning gear engagement can safely occur. Continuous shaft rotation during machine shutdown is imperative to prevent shaft bow that could lead to possible machine damage during startup. The channel receives a signal from a transducer whose output frequency is proportional to the speed of a rotor.

Zero Speed Enable Zero Speed Enable (Aux 1) is a permissive switch that allows the Zero Speed alarm to occur. When this switch is enabled, the Zero Speed alarm will occur when the alarm condition is present. When this switch is disabled, the Zero Speed alarm will be bypassed even when the alarm condition is present. Note: “This functionality for the Aux1 module switch applies to the 3500/50 Tachometer Monitor only.”