990 Vibration Transmitter
Datasheet
BentlyNevadaMachineryCondition Monitoring 141612 Rev. P
Description
The990Vibration Transmitter is intended primarily for the originalequipment manufacturers (OEMs) ofcentrifugalair compressors or smallpumps, motors, or fans who prefer to providea simple4to 20mA proportionalvibration signalas theinput to their machinery controlsystem.
Thetransmitter is a two-wire, loop-powered devicethat accepts input from our 3300NSvproximity probeand its matching extension cable(availablein 5m and 7m system length options).
Thetransmitter conditions thesignalinto appropriatepeak- to-peak vibration amplitudeengineering units, and provides this valueas a proportional4to 20mA industry-standard signalas theinput to thecontrolsystem wheremachinery protection alarming and logic occurs†.
The990transmitter provides thefollowing notablefeatures:
•Integrated Proximitor Sensor requires no externalunit
•Non-isolated “PROXOUT" and "COM" terminals plus a coaxialconnector to providea dynamic vibration and gap voltagesignaloutput for diagnostics‡.
•Non-interacting zero and span potentiometers under theTransmitter labelsupports loop adjustment.
•Test Input pin for quick verification ofloop signaloutput, using a function generator as theinput.
•A Not OK/SignalDefeat circuit prevents high outputs or falsealarms dueto a faulty proximity probeor loose connection.
•ChoiceofDIN-railclips or bulkhead mounting screws as standard options simplifies mounting.
990Vibration Transmitter |
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Datasheet |
141612 Rev. P |
•Potted construction for high humidity (up to 100% condensing) environments. Compatibility with 3300NSvproximity probeallows transducer installation in smallareas with minimalclearance, typicalofcentrifugalair compressors.
Channels configured for Velocity or Acceleration can provide, Direct, 1X amplitude/phaseand 2X amplitude/phase.
Notes
† Vibration transmitters havemany limitations when compared to a continuous vibration monitoring system. They area practical solution in someapplications for measuring generalvibration levels and area valuabletool for overallvibration trending. However, they providelimited capability for machinery diagnostics using thevibration signaland do not capturedynamic vibration signals (used for diagnostics) in theevent ofa vibration alarm. Whilethetransmitter is capableofpeak vibration alarming and non-OK checking, the 4-20mA signalcannot beused to determine thephaseofvibration, and monitor functions such as gap alarms, phasealarms, Timed OK channeldefeat, Danger Bypass, and Trip Multiply cannot beused. In addition, PLCs attached to thevibration transmitter can only providepeak-to-peak trending data and are not suitablefor plant-widediagnostic systems such as System 1or RulePaks.
‡ The990Vibration Transmitter's "ProxOut" coaxialconnector provides a non-isolated dynamic transducer signalfor machinery diagnostics. You can connect this signal directly to battery-powered or isolated test equipment to diagnosemachinery problems. However, sincethe"PROXOUT" signalis not isolated from the4to 20mA loop signal, an interfaceis available(and strongly recommended) for signalisolation. The990/991 Test Adapter conditions the990Transmitter's "PROXOUT" signalfor usewith ac-powered test equipment. It also inverts and isolates the990's transducer signal, making it suitablefor equipment such as oscilloscopes and analyzers, and preserving industry-standard
conventions for signalpolarity. Westrongly recommend theuseofthis test adapter for all applications to maintain isolation between test equipment and theloop signal, and ensure that theinstallation maintains machinery protection integrity.
Specifications
Unless otherwisenoted, thefollowing specifications apply at +22 °C(+72 °F) using a 3300NSvProbeand Extension Cable, and an AISI4140steeltarget.
Thesespecifications also apply to 990 with modifications 147202-01(RMOD4140 3300XL 8MM5M) and 165335-01(MOD 41403300XL 8MM9M).
Electrical
Input |
Accepts 1 non-contacting 3300 NSv |
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Proximity Probeand extension cable. |
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Power |
Requires +12 to +35 Vdc input at the |
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transmitterterminal. |
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4 to 20 mA |
4 to 20 mAdc overspecified full-scale |
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signal |
rangein 2-wireconfiguration. |
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output |
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4 to 20 mA |
Within ±1.5% overspecified full-scale |
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range. Accuracy is rated from theTEST |
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loop |
signal input to thevoltagemeasured |
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accuracy |
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across a 250 Ωloop resistance. |
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Probegap |
Probemust begapped between 0.5 |
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and 1.75 mm (20 and 55 mils)from |
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target to ensurefull scalerange. |
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Maximum |
1,000 Ωincluding cableat 35 Vdc. |
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loop |
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resistance |
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Current |
23 mA typical. |
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limiting |
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Zero and |
Non-interacting external adjustments. |
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span |
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NOT |
Signal output will go to less than 3.6 |
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mA within 100 µs aftera Not OK |
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OK/signal |
condition occurs. Signal output is |
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defeat |
restored within 2-3 seconds afterthe |
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Not OK condition is removed. |
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Signal output stays at less than 3.6 |
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Power-up |
mA (NOTO.K.)for2 to 3 seconds after |
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poweris applied. Thepurposeis to |
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inhibit |
signal that thedeviceis not yet ready. |
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Transients may beobserved when |
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devicegoes O.K. |
2/15
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990Vibration Transmitter |
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Datasheet |
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141612 Rev. P |
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Proximitor |
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Compatiblewith ungrounded, |
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General PurposeApproval by |
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portabletest equipment. When using |
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Electrical |
Canadian Standards Association |
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sensor |
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grounded, ac-powered test |
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(CSA/NRTL/C)in North America and |
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classification |
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output |
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equipment, usethe122115-01 Test |
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by VDE in Europe. 990 has theCE |
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Adapterforsignal isolation. |
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mark forEurope |
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impedance |
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Prox Out has a 10 kΩoutput |
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Maritime Approvals |
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impedancecalibrated fora 10 MΩ |
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Output |
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load. |
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American Bureau of |
Certification Number: 06- |
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1.4 mm (55 mils). Begins at |
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Prox out |
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Shipping (ABS)Type |
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approximately 0.25 mm (10 mils)from |
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HS177078-3-PDA |
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linearrange |
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Approval |
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target surface. |
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Environmental Limits |
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7.87 mV/µm (200 mV/mil)± 6.5% |
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typical including interchangeability |
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Prox Out |
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errors when measured in increments |
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Transmitter Temperature |
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incremental |
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of 0.25 mm (10 mils)overthelinear |
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scalefactor |
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rangeusing a flat 30 mm (1.2 inch) |
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Operating |
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-35 °C to +85 °C (-31 °F to +185 °F) |
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target. Worst case7.87 mV/µm ± 10%. |
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temperature |
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Typical NoiseLevel: 50 mV/pp. |
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Storage |
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-51 °C to +100 °C (-60 °F to +212 °F). |
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Incremental scalefactorremains |
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temperature |
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Temperature |
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within ±10% of 7.87 mV/µm (200 |
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Probe Temperature |
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stability |
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mV/mil)from 0 °C to +70 °C (+32 °F to |
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Operating |
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+158 °F). |
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-35 °C to +177 °C (-31 °F to +350 °F). |
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temperature |
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Frequency |
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5 Hzto 6,000 Hz+0, -3 dB. |
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Storage |
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response |
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-51 °C to +177 °C (-60 °F to +350 °F). |
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temperature |
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Minimum |
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9.5 mm (0.375 in)diameter. |
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100% condensing, non-submerged, |
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target size |
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Relative |
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with protection of coaxial |
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humidity |
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Leadwire |
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Maximum forProximitorSensor |
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connectors. |
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Output (BNC connector), maximum |
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length |
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Mechanical |
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cabledistanceis 3 metres (10 feet). |
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Non- |
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Hazardous, |
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Transducer |
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Polyphenylenesulfide(PPS). |
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Zone2 orDiv |
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PowerSupply: 28V |
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tip material |
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2 Hazardous |
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Transducer |
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AISI 303 or304 Stainless Steel (SST). |
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area |
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casematerial |
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locations |
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ProbeCable |
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75Ωcoaxial, fluoroethylene |
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Zone 0/1 |
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propylene(FEP)insulated. |
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Terminal |
Terminal |
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Cablearmor |
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FlexibleAISI 302 SSTwith optional FEP |
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blocks E3- |
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(optional) |
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outerjacket. |
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blocks E1- |
E4 and |
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Connector |
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Tensile |
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222 N(50 lbf)probecaseto probe |
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E2 “power |
connector |
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J3 "Probe" |
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strength |
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lead, maximum. |
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supply 4- |
J2 |
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Intrinsically |
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20 mA” |
"Proximitor" |
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Transmitter |
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0.43 kg (0.9 lbm). |
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Safe |
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weight |
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Hazardous |
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Ui [28 V |
Uo[28 V |
Uo[ 28 V |
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Total system |
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0.82 kg (1.8 lbm)typical. |
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area |
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weight |
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Io [ 100 |
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locations |
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Ii [120 mA |
Io [6 mA |
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mA |
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Pi[ 0.84 W |
Po [ 0.17 |
Po [ 0.8 W |
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W |
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Ci [20 nF |
Co [ 80 nF |
Co[ 27.3 |
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nF |
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Li [10 μH |
Lo [1H |
Lo [5.3 mH |
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3/15
990Vibration Transmitter |
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Datasheet |
141612 Rev. P |
Compliance and
Certifications
FCC
This devicecomplies with part 15ofthe FCCRules. Operation is subject to the following two conditions:
•This devicemay not causeharmful interference.
•This devicemust accept any interferencereceived, including interferencethat may cause undesired operation.
EMC
EN61000-6-2
EN61000-6-4
EMCDirective2014/30/EU
ATEX
ATEXDirective2014/34/EU
RoHS
RoHS Directive2011/65/EU
Maritime
ABS 2009SteelVessels Rules 1-1-4/7.7,4-8-3/1.11.1,4-9-7/13
4/15
990Vibration Transmitter |
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Datasheet |
141612 Rev. P |
Hazardous Area Approvals
Forthedetailed listing of country and product specific approvals, referto theApprovals Quick ReferenceGuide(108M1756)availablefrom Bently.com.
CSA/NRTL/C
Class I, Div 2
Groups A, B, C, D
T5@ Ta [+85°C, Type4
Installed perDrawing 128838
ATEX/IECEx
II 1 G
Ex ia IIC T4 Ga
T4 @ Ta = -35°C to +85°C
II 3 G
Ex nA IIC T4 Gc
T4 @ Ta= -35 ˚C to + 85˚C
Entity Parameters
Zone 2
PowerSupply: 28V
Zone 0/1
Terminal blocks |
Terminal blocks |
ConnectorJ3 |
E1-E2 “power |
E3-E4 and |
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supply 4-20 |
connectorJ2 |
"Probe" |
mA” |
"Proximitor" |
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Ui [28 V |
Uo[28 V |
Uo[ 28 V |
Ii [120 mA |
Io [6 mA |
Io [ 100 mA |
Pi[ 0.84 W |
Po [ 0.17 W |
Po [ 0.8 W |
Ci [20 nF |
Co [ 80 nF |
Co[ 27.3 nF |
Li [10 μH |
Lo [1H |
Lo [5.3 mH |
5/15
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