Product Introduction
When vibration monitoring failures cause costly downtime, the Bently Nevada 990-10-50-01-01 Vibration Transmitter provides reliable machinery protection. This 990 series transmitter accepts one 3300 NSv proximity probe and delivers a 4-20 mA signal directly proportional to shaft vibration. With its CSA Division 2 certification and 35 mm DIN rail mounting, it fits seamlessly into hazardous area installations.
Technical Specifications Breakdown
Key specifications of the 990-10-50-01-01:
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Full-scale range: 0-10 mils pp (0-250 μm pp) – selectable for monitoring small to moderate shaft vibration.
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System length: 5.0 meters (16.4 feet) – pre-configured cable length for transmitter to probe connection.
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Mounting: 35 mm DIN rail clips – quick, secure installation in standard panels.
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Agency approval: CSA Division 2 – certified for use in potentially explosive environments.
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Power: +12 to +35 Vdc at transmitter terminal – flexible input for a wide range of control systems.
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Maximum loop resistance: 1,000 Ω including cable at 35 Vdc – supports long cable runs without degradation.
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Current limiting: 23 mA typical – protects loop components from overcurrent.
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Weight: 0.43 kg (0.9 lbm) – lightweight for easy handling and mounting.
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4-20 mA accuracy: Within ±1.5% of full-scale range over specified conditions, ensuring precise process feedback.
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Frequency response: 5 Hz to 6,000 Hz +0, 3 dB – captures essential machinery vibration frequencies.
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Signal defeat (NOT OK): Output drops below 3.6 mA within 100 µs of a fault and recovers in 2-3 seconds after fault removal – failsafe design for alarm systems.
Real-World Applications
The 990-10-50-01-01 is ideal for continuous vibration monitoring on compressors, turbines, pumps, and fans in oil & gas, chemical, and power generation plants. Its 4-20 mA output directly interfaces with safety PLCs, distributed control systems (DCS), and dedicated vibration monitors, providing early warning of mechanical deterioration.
Installation & Setup Guidance
For accurate readings, gap the 3300 NSv probe between 0.5 and 1.75 mm (20 to 55 mils) from the target using a non-conducting feeler gauge. The 990-10-50-01-01 includes a 5.0 meter system length – ensure the probe cable does not exceed 3 meters for BNC output. Mount the transmitter on a 35 mm DIN rail within a suitable cabinet. Power with +12 to +35 Vdc; the loop resistance must be ≤1,000 Ω (including cable) at 35 Vdc. Connect a 250 Ω load resistor across the output for 1-5 V measurement. Current limiting (23 mA typical) prevents overcurrent damage.
Maintenance & Reliability
Perform periodic inspections of probe gap, cable connections, and output response. The integrated NOT OK self-check instantly signals faults below 3.6 mA, reducing troubleshooting time. With proper setup and calibration checks every 12 months, the 990-10-50-01-01 delivers years of reliable service, minimizing unplanned downtime.
Selection Guide & Purchasing Advice
Before ordering the 990-10-50-01-01, confirm your application requires the 0-10 mils full-scale range, 5.0 meter cable, and 35 mm DIN rail mounting. For other options, explore alternate 990 series part numbers. Ensure your probe is the 3300 NSv series. For technical support or to order, contact PLC Source PRO (store link: ubest101.myshopify.com). We stock genuine Bently Nevada modules ready for immediate shipment.