Product Overview
The Bently Nevada 990-05-50-03-00 990 Vibration Transmitter is a precision industrial automation module designed for continuous vibration monitoring of rotating machinery. This Bently Nevada 990-05-50-03-00 transmitter accepts one non-contacting 3300 NSv Proximity Probe and extension cable, converting vibration data into a 4-20 mA signal for integration with control systems. With a full-scale option of 0-5 mils pp (0-125 μm pp) and a system length of 5.0 meters (16.4 feet), the 990-05-50-03-00 delivers accurate, real-time vibration measurements for predictive maintenance and machine protection.
Technical Specifications Breakdown
The Bently Nevada 990-05-50-03-00 offers critical performance parameters derived from its datasheet:
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Input: Accepts 1 non-contacting 3300 NSv Proximity Probe and extension cable.
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Power Requirement: +12 to +35 Vdc input at the transmitter terminal.
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4-20 mA Loop Accuracy: Within ±1.5% over the specified full-scale range (0-5 mils). Accuracy is measured from the TEST signal input to voltage across a 250 Ω load, exclusive of Prox Out Incremental Scale Factor.
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Maximum Loop Resistance: 1,000 Ω including cable at 35 Vdc.
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Current Limiting: 23 mA typical.
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Frequency Response: 5 Hz to 6,000 Hz +0, -3 dB.
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NOT OK/Signal Defeat: Output drops below 3.6 mA within 100 μs after a fault condition, restoring within 2-3 seconds after clearance.
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Weight: 0.43 kg (0.9 lbm).
Industry Applications
The Bently Nevada 990-05-50-03-00 is ideal for vibration monitoring in turbines, compressors, pumps, and fans where early fault detection reduces unplanned downtime. Its fast Not OK signal defeat ensures rapid response to probe malfunctions or target loss, preventing false alarms in critical loops. The 0-5 mils full-scale range suits small displacement machines like high-speed centrifugal compressors.
Installation & Setup Guidance
Mount the Bently Nevada 990-05-50-03-00 using the DIN clips and screws (mounting option 03). The probe gap must be set between 0.5 mm and 1.75 mm (20-55 mils) from the target to guarantee full-scale range. Wire the transmitter in a 2-wire 4-20 mA loop with a maximum loop resistance of 1,000 Ω (including cable) at 35 Vdc. For Proximitor Sensor Output (BNC connector), keep cable distance under 3 meters (10 feet). Non-hazardous, Zone 2, or Div 2 areas are acceptable with a 28 V power supply.
Maintenance & Reliability
Periodic calibration checks of the zero and span adjustments ensure long-term accuracy. The non-interacting adjustments simplify field recalibration. The transmitter's current limiting (23 mA typical) protects against loop faults, while the fast signal defeat under Not OK conditions alerts operators to probe degradation. This Bently Nevada 990-05-50-03-00 module is designed for high reliability in continuous monitoring applications, reducing overall maintenance costs.
Selection Guide & Purchasing Advice
When ordering the Bently Nevada 990-05-50-03-00, confirm the full-scale option (05 = 0-5 mils), system length (5 = 5.0 meters), mounting (03 = DIN clips/screws), and agency approval (00 = not required). The transmitter requires a compatible 3300 NSv Proximity Probe and extension cable (sold separately). For genuine Bently Nevada parts and reliable service, visit PLC Source PRO at ubest101.myshopify.com.