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Bently Nevada's programmable industry-leading vibration transmitter technologies protect your critical machinery. Bently Nevada offers two types of transmitters: the 990 Vibration Transmitter and the 991 Thrust Transmitter.
Vibration Transmitter
These new technologies are consistently dependable for process control: automation that safeguards your system’s centrifugal air compressors, small pumps, motors, and fans, as our vibration radio system transmitters work with Bently Nevada 3300 NSv (narrow side view) proximity probes.
These compact yet durable automation transmitters are wireless transmitter telemetry for installation in small spaces with minimal clearance – where other types of transmitters, amplifiers, and connectors won’t fit.
In addition to our process control wireless transmitters, we also provide the self-contained 177230 Piezo Accelerometer, which guarantees comprehensive condition monitoring of your general-purpose machinery. The 177230 facilitates machinery control system input and gives you an optional secondary dynamic electrical signal/output signal to diagnose your machinery's
Product Features
Compatible With NSv Probes: The 990 and 991 work with our 3300 narrow side view (NSv) proximity probes.
The 990 and the 991 both employ an integrated proximity probe, thus negating the need for an external unit.
The 990 and the 991 both feature a Not OK/Signal Defeat circuit to prevent high outputs due to a faulty proximity probe or loose connection.
The 990 and the 991 both feature potted construction for high humidity environments (up to 100% condensing)
Installs in Tight Spots: Enables transducer installation in small spaces with minimal clearance.
Signal Options: The 177230 provides a simple 4 to 20 mA proportional vibration or axial displacement signal as the machinery control system input and a secondary dynamic signal for diagnostics.
The 177230 also features interface compatibility with PLCs and control systems like DCS and SCADA, requires no field configuration or adjustments, provides accurate and repeatable data as well as raw vibration signal for verification and analysis.
Bently Nevada 990 Vibration Transmitter Specifications
Input Accepts 1 non-contacting 3300 NSv Proximity Probe and extension cable
Power Requires +12 to +35 Vdc input at the transmitter terminal
Signal Output 4-20 mA
Loop Accuracy Within ±1.5% over specified full-scale range
Probe Gap Probe must be gapped between 0.5 and 1.75 mm from target to ensure full scale range
Maximum Loop Resistance 1,000 Ω including cable at 35 Vdc
Current Limiting 23 mA typical
Zero and Span Non-interacting external adjustments
NOT OK/Signal Defeat Signal output will go to less than 3.6 mA within 100 μs after a Not OK condition occurs. Signal output is restored within 2-3 seconds after the Not OK condition is removed
Power-up Inhibit Signal output stays at less than 3.6 mA for 2 to 3 seconds after power is applied
Proximitor Sensor Output Compatible with ungrounded, portable test equipment. When using grounded, ac-powered test equipment, use the 122115-01 Test Adapter for signal isolation
Output Impedance Prox Out has a 10 kΩ output impedance calibrated for a 10 MΩ load
Prox Out Linear Range 1.4 mm. Begins at approximately 0.25 mm from target surface
Prox Out Incremental Scale Factor 7.87 mV/μm (200 mV/mil) ± 6.5% typical including interchangeability errors when measured in increments of 0.25 mm over the linear range using a flat 30 mm target. Worst case 7.87 mV/μm ± 10%. Typical Noise Level: 50 mV/pp
Temperature Stability Incremental scale factor remains within ±10% of 7.87 mV/μm from 0 °C to +70 °C
Frequency Response 5 Hz to 6,000 Hz +0, -3 dB
Minimum Target Size 9.5 mm diameter
Leadwire Length Maximum for Proximitor Sensor Output (BNC connector), maximum cable distance is 3 meters
Electrical Classification General Purpose Approval by Canadian Standards Association (CSA/NRTL/C) in North America and by VDE in Europe. 990 has the CE mark for Europe
Related Products
The 990 (Vibration) and 991 (Thrust) Transmitters are intended for original equipment manufacturers (OEMs) of centrifugal air compressors or small pumps, motors, or fans who prefer to provide a simple 4 to 20 mA proportional vibration or axial displacement (thrust) signal as the input to their machinery control system. Both transmitters are compatible with our 3300 NSv and the narrow sideview proximity probes allow for transducer installation in small spaces with minimal clearance.
Our 177230 Seismic Transmitter is a self-contained piezo-accelerometer that offers condition monitoring of general-purpose machinery with rolling element bearings. The 177230 produces 4 to 20 mA primary signal outputs to a control system and a secondary dynamic signal for diagnostics. It is suitable for motors, pumps and small reciprocating compressors where accelerometer monitoring is appropriate. Bently Nevada offers CSA/NRTL/C, ATEX/IECEx certifications for Hazardous Areas with potentially flammable atmospheres. The product has a sensitivity of 10.2 mV/m/s^2 (100 mV/g) ± 20% and a frequency response of 10 Hz to 1 kHz (600 cpm to 60 kcpm) ± 10% and 1Hz to 10 kHz (60cpm to 600 kcpm) ± 3 dB.
990-04-50-01-00，990-04-50-01-CN，990-04-50-02-00，990-04-50-02-CN，990-04-50-03-00，
990-04-50-03-CN，990-04-70-01-00，990-04-70-01-CN，990-04-70-02-00，990-04-70-02-CN，
990-04-70-03-00，990-04-70-03-CN，990-05-50-01-00，990-05-50-01-CN，990-05-50-02-00，
990-05-50-02-CN，990-05-50-03-00，990-05-50-03-CN，990-05-70-01-00，990-05-70-01-CN，
990-05-50-01-05，990-05-70-02-00，990-05-70-02-CN，990-05-70-03-00，990-05-70-03-CN，
990-05-XX-01-00(W/MOD 147202-01)，990-05-XX-01-00(W/MOD 165335-01)，
990-05-XX-01-CN(MOD:147202-01)，990-05-XX-01-CN(MOD:284512-01)，
990-05-XX-02-00(MOD:147202-01)，990-05-XX-02-00(MOD165335-01)，
990-05-XX-02-CN(MOD147202-01)，990-05-XX-03-00(MOD165335-01)，
990-05-XX-03-00(W/MOD 147202-01)，990-05-XX-03-CN(W/MOD 147202-01)，
990-08-XX-01-00(MOD 283278-01)，990-08-XX-01-00(MOD167541-01)，
990-08-XX-01-00(W/MOD 165353-01)，990-08-XX-01-CN(MOD 165353-01)，
990-08-XX-01-CN(MOD 283278-01)，990-08-XX-01-CN ( MOD 283278-04)，
990-08-XX-01-CN(MOD:163930-02)，990-08-XX-02-00(MOD:163930-01)，
990-08-XX-02-00(RMOD:283278-01)，990-10-XX-01-00(MOD165353-01)，
990-10-XX-01-00(MOD:163930-01)，990-10-XX-01-00(MOD:283278-01)，
990-10-XX-01-05(MOD 283278-01)，990-10-XX-01-CN(MOD:165353-01)，
990-10-XX-01-CN(W/MOD 163930-01)，990-10-XX-01-CN(W/MOD 283278-01)，
990-10-XX-01-CN(W/MOD 285269-01)，990-10-XX-02-00(W/MOD 163930-01)，
990-10-XX-02-00(W/MOD 283278-01)，990-10-XX-02-CN(W/MOD 283278-01)，
990-16-XX-01-CN(W/MOD 106M1675-01)，990-05-XX-01-00 MOD:147202-01，
990-04-XX-01-00 MOD:147202-01，990-04-XX-01-00(MOD 147202-01)，
990-04-XX-01-00(MOD 165335-01)，990-04-XX-01-CN (MOD 165335-01)，
990-04-XX-01-CN(MOD 165335-01)
