Introduction
The Bently Nevada 990-10-50-03-00 990 Vibration Transmitter provides reliable vibration monitoring for critical rotating machinery. Designed to accept a single non-contacting 3300 NSv proximity probe, this transmitter converts shaft vibration into a 4 to 20 mA signal for seamless integration with control systems. Its robust design ensures accurate readings even in harsh industrial environments.
How the NOT OK Signal Defeat Enhances Reliability
In industrial automation, unexpected sensor faults can lead to costly downtime. The Bently Nevada 990-10-50-03-00 addresses this with its NOT OK/signal defeat feature. When a fault condition occurs, the output drops below 3.6 mA within 100 µs, instantly alerting operators. Once the fault clears, the signal restores within 2-3 seconds, minimizing disruption. This rapid response makes the module ideal for fail-safe applications in turbine, compressor, and pump monitoring.
Technical Specifications Breakdown
Key parameters from the Bently Nevada 990-10-50-03-00 include:
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Full-scale Option: 0-10 mils pp (0-250 µm pp) – suitable for common vibration ranges.
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Input: Accepts 1 non-contacting 3300 NSv Proximity Probe and extension cable.
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Power: Requires +12 to +35 Vdc input at the transmitter terminal.
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4 to 20 mA Output: Linear over full-scale range, ±1.5% accuracy (excluding probe scale factor).
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Maximum Loop Resistance: 1,000 Ω including cable at 35 Vdc.
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Frequency Response: 5 Hz to 6,000 Hz +0, 3 dB.
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Probe Gap: Must be between 0.5 and 1.75 mm (20 to 55 mils) from target.
Installation & Setup Guidance
Mount the Bently Nevada 990-10-50-03-00 using DIN clips and screws (mounting option 03). Ensure the proximity probe gap falls within 0.5–1.75 mm. Connect power (+12 to +35 Vdc) and 4-20 mA loop wiring as per standard 2-wire configuration. Use non-interacting zero and span adjustments for calibration. For Proximitor sensor output (BNC), keep cable length under 3 meters.
Maintenance & Reliability
Periodically verify probe gap and loop resistance. The transmitter's current limiting (23 mA typical) protects against overcurrent. For hazardous area installations (Zone 2/Div 2), use a 28 V power supply. Regular inspection of cable connections ensures consistent signal integrity. With no moving parts, the Bently Nevada 990-10-50-03-00 requires minimal maintenance.
Selection Guide & Purchasing Advice
When ordering the Bently Nevada 990-10-50-03-00, confirm your system length option (5.0 meters standard) and agency approval requirement (option 00 for non-hazardous). For reliable supply, source from PLC Source PRO (store URL ubest101.myshopify.com) to ensure genuine Bently Nevada parts.