Product Introduction
When rotating machinery requires precise vibration monitoring, the Bently Nevada 990-04-XX-01-00 MOD 147202-01 provides a reliable solution. This transmitter accepts one non-contacting 3300 NSv Proximity Probe and converts vibration into a 4-20 mA signal. Designed for non-hazardous Zone 2 or Div 2 areas, it offers a compact upgrade path for legacy systems. Made in the U.S.A., the 990-04-XX-01-00 MOD 147202-01 supports both 5.0-meter and 7.0-meter cable options.
Technical Specifications
| Parameter |
Value |
| Full-Scale Range |
0-4 mils pp (0-100 μm pp) |
| Input |
Accepts 1 non-contacting 3300 NSv Proximity Probe |
| Power Requirement |
+12 to +35 Vdc at transmitter terminal |
| Output |
4 to 20 mAdc over full-scale range (2-wire) |
| Loop Accuracy |
±1.5% of full-scale (250 Ω load, additional to Prox Out 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 |
| Weight |
0.43 kg (0.9 lbm) |
Industry Applications
Upgrading older vibration monitoring systems with the 990-04-XX-01-00 MOD 147202-01 enhances fault detection in critical rotating equipment. Common applications include steam turbines, centrifugal compressors, large pumps, and fans. The transmitter's rapid NOT OK/signal defeat response (less than 3.6 mA within 100 µs) protects downstream control systems during probe faults. Its external zero and span adjustments simplify field calibration without removing the unit from service.
Installation & Setup Guidance
Proper probe gap is essential: maintain 0.5 to 1.75 mm (20 to 55 mils) from the target. Use the BNC connector for Proximitor Sensor output; maximum cable distance is 3 meters (10 feet). The transmitter requires +12 to +35 Vdc at the terminal. For Division 2 hazardous areas, select Mounting Option 01 (CSA Division 2). The power supply should deliver 28 V typical (see ordering). Ensure loop resistance does not exceed 1,000 Ω at 35 Vdc to maintain specified accuracy.
Selection Guide & Purchasing Advice
When ordering the 990-04-XX-01-00 MOD 147202-01, specify the Full-Scale Option 04 (0-4 mils). Choose System Length B: XX=50 for 5.0 meters or XX=70 for 7.0 meters cable. The Mounting Option 01 is CSA Division 2. Agency approval is not required (Option 00). For further assistance, contact ubest101 through the store link. This module is a direct upgrade for many Bently Nevada 3300 series installations, offering improved accuracy and faster response.