Product Introduction
When unscheduled downtime threatens production, the Bently Nevada 990-10-70-01-01 990 Vibration Transmitter provides continuous, accurate machinery vibration monitoring. This industrial automation module converts proximity probe signals into a 4-20 mA output for seamless integration with control systems. Designed for non-hazardous and Class I Division 2 environments, it delivers the reliability needed to protect critical rotating assets and reduce maintenance costs.
Technical Specifications
| Parameter |
Value |
| Full-scale Option |
0-10 mils pp (0-250 μm pp) |
| System Length Option |
7.0 meters (23.0 feet) |
| Mounting Option |
35 mm DIN rail clips |
| Agency Approval |
CSA Division 2 |
| Input |
Accepts 1 non-contacting 3300 NSv Proximity Probe and extension cable |
| Power Requirement |
+12 to +35 Vdc at transmitter terminal |
| Output Signal |
4-20 mAdc over full-scale range, 2-wire configuration |
| Accuracy |
Within ±1.5% over full-scale range |
| Maximum Loop Resistance |
1,000 Ω including cable at 35 Vdc |
| Current Limiting |
23 mA typical |
| Probe Gap |
0.5 to 1.75 mm (20 to 55 mils) |
| Frequency Response |
5 Hz to 6,000 Hz +0, -3 dB |
| Minimum Target Size |
9.5 mm (0.375 in) diameter |
| Leadwire Length (BNC) |
Maximum 3 meters (10 feet) |
| Weight |
0.43 kg (0.9 lbm) |
Installation & Setup Guidance
Mount the Bently Nevada 990-10-70-01-01 using the provided 35 mm DIN rail clips. Ensure the 3300 NSv proximity probe is gapped between 0.5 and 1.75 mm from the target. Connect the extension cable and power supply (+12 to +35 Vdc) to the transmitter terminals. The 2-wire 4-20 mA loop connects directly to your monitoring system. For Non-Hazardous, Zone 2, or Div 2 locations, use a 28 V power supply as specified. Use non-interacting zero and span adjustments for calibration.
Maintenance & Reliability
The 990-10-70-01-01 enhances your plant's reliability by providing continuous vibration monitoring. Its NOT OK/signal defeat function forces the output below 3.6 mA within 100 µs upon fault detection, enabling immediate protective action. This fast response reduces the risk of catastrophic machine failure. With current limiting (23 mA typical) and robust construction (0.43 kg), the transmitter requires minimal routine inspection. Verify proper probe gap and loop resistance periodically to maintain measurement accuracy.
Selection Guide & Purchasing Advice
Before ordering the Bently Nevada 990-10-70-01-01, confirm your system requires a 3300 NSv non-contacting probe and extension cable. Verify the full-scale option (0-10 mils pp) matches your vibration range. For installations in hazardous areas, ensure your facility meets CSA Division 2 requirements. For reliable supply of this and other industrial automation modules, contact ubest101.