Product Introduction
With its 4-20 mA loop accuracy within ±1.5% and frequency response from 5 Hz to 6 kHz, the Bently Nevada 990-10-70-01-CN 990 Vibration Transmitter delivers precise vibration monitoring for critical rotating machinery. This industrial automation module accepts one non-contacting 3300 NSv Proximity Probe and extension cable, converting probe signals into a 4-20 mA output proportional to full-scale range.
Technical Specifications
| Parameter |
Value |
| Input |
Accepts 1 non-contacting 3300 NSv Proximity Probe and extension cable |
| Power Requirement |
+12 to +35 Vdc at transmitter terminal |
| 4 to 20 mA Output |
Over specified full-scale range in 2-wire configuration |
| Loop Accuracy |
Within ±1.5% over full-scale range (additional to Prox Out Incremental Scale Factor) |
| Frequency Response |
5 Hz to 6,000 Hz +0, -3 dB |
| Maximum Loop Resistance |
1,000 Ω including cable at 35 Vdc |
| Current Limiting |
23 mA typical |
| Probe Gap Range |
0.5 to 1.75 mm (20 to 55 mils) |
| Minimum Target Size |
9.5 mm (0.375 in) diameter |
| Leadwire Length (BNC) |
Maximum 3 meters (10 feet) |
| Transmitter Weight |
0.43 kg (0.9 lbm) |
| Mounting |
35 mm DIN rail clips |
| Agency Approval |
CN Approvals country specific |
Industry Applications
The Bently Nevada 990-10-70-01-CN excels in monitoring vibration on steam turbines, centrifugal compressors, and large pumps. Its 5 Hz to 6 kHz frequency response covers both low-speed rotor dynamics and high-speed gear mesh frequencies. The ±1.5% loop accuracy ensures reliable data for predictive maintenance programs, reducing unplanned downtime and extending equipment life.
Installation & Setup Guidance
Mount the transmitter on a standard 35 mm DIN rail using the provided clips. Connect the 3300 NSv Proximity Probe to the BNC input, ensuring cable length does not exceed 3 meters. Gap the probe between 0.5 and 1.75 mm (20 to 55 mils) from the target to achieve full-scale range. Power the transmitter with +12 to +35 Vdc at the terminal; the loop resistance must not exceed 1,000 Ω at 35 Vdc. Non-interacting external adjustments for zero and span simplify calibration.
Compatibility & Integration
Designed for use with Bently Nevada 3300 NSv Proximity Probes, the 990-10-70-01-CN outputs a standard 4-20 mA signal compatible with most PLCs, DCS, and SCADA systems. The signal defeat feature drops output below 3.6 mA within 100 µs upon a Not OK condition, ensuring fail-safe operation. The transmitter is suitable for Non-Hazardous, Zone 2, or Division 2 hazardous area locations when paired with a 28 V power supply.
Buying Guide & Selection Advice
Before purchasing, verify that your existing probe model is a 3300 NSv with compatible extension cable. Confirm loop resistance requirements and power supply voltage range (+12 to +35 Vdc). For specific application support or to order this Bently Nevada 990-10-70-01-CN 990 Vibration Transmitter, contact ubest101, a trusted supplier of industrial automation spares at PLC Source PRO.