Product Introduction
When unexpected machinery vibrations threaten production uptime, the Bently Nevada 990-10-50-03-CN 990 Vibration Transmitter delivers immediate and reliable feedback. This industrial automation module accepts a single non-contacting 3300 NSv Proximity Probe and extension cable, converting shaft vibration into a precise 4 to 20 mA signal. The 990-10-50-03-CN is engineered for continuous monitoring in critical rotating equipment, providing early warning of developing faults.
Technical Specifications Breakdown
The Bently Nevada 990-10-50-03-CN offers a full-scale option of 0-10 mils pp (0-250 μm pp) and operates with a system length of 5.0 meters (16.4 feet). Key performance parameters include:
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Power Requirement: +12 to +35 Vdc input at the transmitter terminal.
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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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4 to 20 mA Loop Accuracy: Within ±1.5% over specified full-scale range.
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Frequency Response: 5 Hz to 6,000 Hz +0, -3 dB.
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Probe Gap: Must be gapped between 0.5 and 1.75 mm (20 to 55 mils).
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NOT OK/Signal Defeat: Output drops to less than 3.6 mA within 100 µs after a Not OK condition; restores in 2-3 seconds after removal.
These specifications ensure the 990-10-50-03-CN provides accurate, real-time vibration data for predictive maintenance programs.
Industry Applications
The Bently Nevada 990-10-50-03-CN excels in protecting turbomachinery, compressors, and large pumps. In a refinery, the fast NOT OK response prevents catastrophic bearing failure by immediately signaling a shutdown condition. On a gas turbine, the precise 4-20 mA output integrates seamlessly with DCS or PLC systems to trend vibration levels. The transmitter's ability to quickly signal a fault condition aligns with failure mode analysis, allowing operators to isolate issues before they escalate.
Installation & Setup Guidance
Mount the 990-10-50-03-CN using DIN clips and screws (mounting option 03). Ensure the probe gap is set between 0.5 and 1.75 mm using the provided adjustment instructions. Connect the non-contacting 3300 NSv Proximity Probe and extension cable to the transmitter input. Power the unit with a +12 to +35 Vdc supply, verifying loop resistance does not exceed 1,000 Ω at 35 Vdc. The zero and span are adjusted via non-interacting external controls, simplifying calibration.
Maintenance & Reliability
Routine inspection of the Bently Nevada 990-10-50-03-CN focuses on verifying probe gap and loop integrity. The current limiting feature protects against overcurrent conditions. Given the 23 mA typical clamp, the transmitter sustains operation even under fault scenarios. The signal defeat mechanism (output <3.6 mA within 100 µs) ensures control systems receive immediate fault indication, reducing downtime and repair costs. This reliability makes the 990-10-50-03-CN ideal for hazardous areas classified as Non-Hazardous, Zone 2, or Div 2.
Selection Guide & Purchasing Advice
Before purchasing a Bently Nevada 990-10-50-03-CN, verify that your system requires the 0-10 mils full-scale range and a 5.0 meter cable length. Confirm compatibility with 3300 NSv probes and extension cables. For custom requirements, check the agency approval option (CN Approvals country specific). PLC Source PRO (available at ubest101.myshopify.com) stocks this genuine Bently Nevada module, ensuring fast delivery and support for your industrial automation needs.