Product Introduction
When vibration monitoring is critical for machine protection, the Bently Nevada 990-10-50-03-01 990 Vibration Transmitter delivers reliable 4-20 mA output over a 0-10 mils pp (0-250 μm pp) full-scale range. This Industrial Automation Module accepts one non-contacting 3300 NSv Proximity Probe and extension cable, converting shaft vibration into a standardized loop signal. The Bently Nevada 990-10-50-03-01 is CSA Division 2 approved and made in the U.S.A.
Technical Specifications Breakdown
| Parameter |
Value |
| Full-Scale Option |
0-10 mils pp (0-250 μm pp) |
| System Length |
5.0 meters (16.4 feet) |
| Mounting Option |
DIN clips and screws |
| Power Requirement |
+12 to +35 Vdc at transmitter terminal |
| Maximum Loop Resistance |
1,000 Ω at 35 Vdc |
| Current Limiting |
23 mA typical |
| 4-20 mA Accuracy |
±1.5% over full-scale range |
| Frequency Response |
5 Hz to 6,000 Hz +0, -3 dB |
| Weight |
0.43 kg (0.9 lbm) |
The Bently Nevada 990-10-50-03-01 offers non-interacting zero and span adjustments. Its signal output goes below 3.6 mA within 100 μs during a Not OK condition, restoring within 2-3 seconds after fault removal.
Industry Applications
This transmitter excels in turbine, compressor, and pump vibration monitoring. The fast NOT OK/signal defeat feature (990-10-50-03-01) alerts control systems to probe faults or power loss, preventing undetected damage. In critical rotating machinery, the Bently Nevada 990-10-50-03-01 ensures continuous protection with its 4-20 mA loop accuracy and 1,000 Ω loop driving capability.
Installation & Setup Guidance
Mount the 990-10-50-03-01 using DIN clips or screws. The 3300 NSv probe must be gapped between 0.5 mm and 1.75 mm (20 to 55 mils) from the target to cover the full-scale range. Connect power (+12 to +35 Vdc) and read the 4-20 mA loop across a 250 Ω resistor. Maximum leadwire length from Proximitor output to BNC connector is 3 meters (10 feet).
Troubleshooting & Common Issues
If the loop current drops below 3.6 mA, a Not OK condition exists – check probe gap, cabling, and power supply. The Bently Nevada 990-10-50-03-01 current limiting (23 mA typical) protects against overcurrent. Verify that loop resistance does not exceed 1,000 Ω including cable at 35 Vdc to maintain accuracy. Also ensure the target size is at least 9.5 mm diameter.
Selection Guide & Purchasing Advice
When ordering, confirm the full-scale option (0-10 mils) and system length (5.0 m) match your installation. The 990-10-50-03-01 includes DIN mounting clips and screws. For genuine Bently Nevada parts, choose a trusted supplier like ubest101 to ensure authenticity and reliable performance.