Bently Nevada 3500/42M 140734-02 Proximitor/Seismic Monitor | Brand New
The Bently Nevada 140734-02 is a proximitor/seismic monitor for the Bently Nevada 3500 Series machinery protection platform. Application: Used for monitoring vibrations and positions in machinery | Channels: 4-channel monitor | Input Types: Proximity and seismic transducers. Factory-sealed, tested on live rack with 48-hour burn-in. 12-month warranty. Ships within 24 hours.
Technical Specifications
| Product Name | 140734-02 |
|---|---|
| Type | Proximitor Seismic Monitor |
| Application | Used for monitoring vibrations and positions in machinery |
| Channels | 4-channel monitor |
| Input Types | Proximity and seismic transducers |
| Dimensions | 263 × 58 × 28 mm |
| Weight | 0.85 kg |
| Country of Origin | United States |
| Signal Conditioning | Conditions signals to provide various vibration and position measurements |
| User-Programmable Alarms | Compares conditioned signals with user-programmable alarms |
| Versatile Monitoring | Capable of monitoring radial vibration, thrust position, differential expansion, eccentricity, REBAM, acceleration, velocity, and shaft absolute circular acceptance region |
| Manufacturer | Bently Nevada |
| Model / SKU | 140734-02 |
✓ Ships within 24 hours | ✓ 12-Month Warranty | ✓ Worldwide Delivery
Detailed Product Information
🎯 Monitoring Function & Protection Role
The Bently Nevada 140734-02 is a dedicated monitoring module within the 3500 Series rack. It continuously measures critical machinery parameters and provides relay outputs for alarm and shutdown protection per API 670. Unlike general-purpose I/O, monitor modules implement signal conditioning, filtering, and threshold comparison directly in hardware — ensuring protection response times under 100 milliseconds even if the rack communication is interrupted.
What It Monitors
- Vibration Monitors: Accept Proximitor inputs, extract peak-to-peak amplitude, compare against programmable alarm/danger setpoints.
- Position Monitors: Measure DC gap voltage for thrust position, differential expansion, and rod drop on reciprocating compressors.
- Temperature Monitors: Accept RTD and thermocouple inputs for bearing metal and case temperature monitoring.
- Tachometer/Speed: Accept magnetic pickup or proximity probe inputs for rotational speed and zero-speed detection.
Setpoint Configuration
Alarm and danger setpoints should be established based on ISO 10816 or API vibration standards for your specific machine type. Always document setpoint rationale — during an incident investigation, you will need to justify why the machine tripped (or didn't trip) at a given threshold.
🔧 Technical Specifications & Calibration
Specifications
| Parameter | Value |
|---|---|
| Product Name | 140734-02 |
| Type | Proximitor Seismic Monitor |
| Application | Used for monitoring vibrations and positions in machinery |
| Channels | 4-channel monitor |
| Input Types | Proximity and seismic transducers |
| Dimensions | 263 × 58 × 28 mm |
| Weight | 0.85 kg |
| Country of Origin | United States |
Calibration & Verification
- Use a calibrated signal source (TK-3 for vibration, decade box for temperature) to inject known test signals.
- Verify the module's front-panel reading matches the injected signal within ±1% of full scale.
- Force each alarm and danger relay by temporarily lowering setpoints below current readings — verify DCS annunciation and trip logic.
- Document all calibration values and relay test results in your maintenance management system.
📦 Shipping & Warranty
24-hour handling. Anti-static packaging. DHL/FedEx/UPS worldwide. 12-month warranty covering component failure, calibration drift, relay failure.
❓ FAQ
Q: How often should monitor modules be calibrated?
A: Bently Nevada recommends annual calibration verification. For SIL-rated safety loops, verify every 6 months per IEC 61511.
Q: Can I hot-swap a monitor module?
A: No. The 3500 rack monitors are NOT hot-swappable. Power down the rack, replace the module, reconfigure if needed, power up, and verify.
Q: My monitor shows OK but the relay doesn't trip during test?
A: Check: (1) Relay module installed in correct slot; (2) Monitor-to-relay channel mapping in Rack Configuration Software; (3) Relay module STATUS LED — if amber, the relay module itself may be faulty.
💰 Protection ROI
This monitor module is the last line of defense between normal operation and catastrophic machine failure. One avoided bearing wipe on a 50 MW turbine saves $500,000+ in repairs and 4+ weeks of downtime. The monitor cost is recovered in the first detected incident — often within months of commissioning.
Related Products
