990-10-50-03-00 Overview: Precision Vibration Monitoring
When rotating machinery health is critical, the 990-10-50-03-00 from Bently Nevada provides a reliable, loop-powered solution. This 990 Vibration Transmitter accepts one non-contacting 3300 NSv Proximity Probe and extension cable, converting vibration into a standard 4-20 mA signal. Designed for continuous operation, it helps maintenance teams detect issues early and avoid unplanned downtime.
With a full-scale range of 0-10 mils pp (0-250 μm pp), the transmitter suits applications requiring precise displacement measurement. Its 5.0-meter (16.4 feet) system length offers flexibility in installation. The DIN clips and screws mounting option simplifies panel integration.
Key Specifications and Performance Metrics
The 990-10-50-03-00 operates on a +12 to +35 Vdc input, making it compatible with many existing power supplies. Its 4-20 mA output loop accuracy is within ±1.5% over the specified full-scale range, measured from the TEST signal input to the voltage across a 250 Ω loop resistance. This accuracy is in addition to the Prox Out Incremental Scale Factor.
- Input: Accepts 1 non-contacting 3300 NSv Proximity Probe and extension cable.
- Power: Requires +12 to +35 Vdc input at the transmitter terminal.
- Output: 4 to 20 mAdc over specified full-scale range in 2-wire configuration.
- Maximum Loop Resistance: 1,000 Ω including cable at 35 Vdc.
- Current Limiting: 23 mA typical.
- Frequency Response: 5 Hz to 6,000 Hz +0, 3 dB.
- Minimum Target Size: 9.5 mm (0.375 in) diameter.
- Leadwire Length: Maximum for Proximitor Sensor Output (BNC connector) is 3 meters (10 feet).
These specifications ensure reliable performance in demanding industrial environments. The transmitter's current limiting protects the loop from overcurrent conditions.
Buyer's Guide: Evaluating the 990-10-50-03-00
When selecting a vibration transmitter, consider the following factors to ensure the 990-10-50-03-00 meets your needs:
- Full-Scale Range: The 0-10 mils pp range is suitable for many rotating machines. Verify it matches your vibration amplitude expectations.
- Power Supply: The +12 to +35 Vdc input range offers flexibility. Confirm your available supply voltage is within this range.
- Loop Resistance: The maximum 1,000 Ω loop resistance at 35 Vdc must accommodate your cable and monitoring equipment.
- Probe Gap: The probe must be gapped between 0.5 and 1.75 mm (20 and 55 mils) from the target to ensure full-scale range.
- Environmental Rating: The transmitter is suitable for NonHazardous, Zone 2 or Div 2 hazardous area locations. Verify your area classification.
These points help you evaluate whether this transmitter aligns with your application requirements.
Installation and Setup Guidance
Proper installation is essential for accurate vibration measurement. Mount the transmitter using the DIN clips and screws option. Connect the 3300 NSv Proximity Probe and extension cable to the input. Ensure the probe gap is set correctly between 0.5 and 1.75 mm (20 and 55 mils) from the target. Power the transmitter with +12 to +35 Vdc at the terminal. The 4-20 mA output connects in a 2-wire configuration. Follow the manufacturer's manual for detailed wiring and mounting instructions.
Maintenance and Reliability
Regular inspection of the transmitter and probe is recommended to maintain accuracy. Check the probe gap periodically and verify the loop current. The transmitter's Not OK/signal defeat function forces the output below 3.6 mA within 100 µs after a Not OK condition, aiding diagnostics. This feature helps identify sensor faults quickly. For safety-rated equipment, follow the manufacturer's safety manual for maintenance procedures.
Compatibility and Integration
The 990-10-50-03-00 integrates with Bently Nevada's 3300 NSv Proximitor systems. It accepts one non-contacting 3300 NSv Proximity Probe and extension cable. The 4-20 mA output can interface with PLCs, DCS, or standalone monitors. No additional communication protocols are specified in the data.
Troubleshooting Common Issues
If the output signal is not within the expected range, check the probe gap and loop resistance. Ensure the power supply is within +12 to +35 Vdc. If the signal goes below 3.6 mA, a Not OK condition may exist. Verify the probe and cable connections. For persistent issues, consult the Bently Nevada documentation or contact AutoDCSTech for support.
Product Support and Availability
The 990-10-50-03-00 is available from AutoDCSTech. In stock and ready to ship. Contact AutoDCSTech for current lifecycle status and availability before ordering.
