WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
3. Key Technical Specifications
- Module Type: 3500/42 Proximitor/Seismic Monitor
- Channels: 4 independent programmable channels
- Input Types: Eddy current proximity and seismic transducers
- Measurements: Radial vibration, position, velocity, acceleration
- Alarm Setpoints: User-programmable per channel
- Operating Temperature: -30°C to +65°C
- Status Indicators: Front panel LEDs for OK, Alert, Danger
- I/O: Dedicated Proximitor/Seismic I/O module
- Power: Rack backplane powered
4. Product Introduction
The Bently Nevada 350042 is the 3500/42 Proximitor/Seismic Monitor. This 4-channel module accepts inputs from proximity probes and seismic transducers to deliver vibration, position, and related measurements.
It compares signals against programmable setpoints to generate alarms. The module is widely used for monitoring shaft vibration on fluid-film bearing machines and seismic vibration on casings.
- 3500/42M 135489-01
- 3500/42M 135489-01
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No OK LED | Probe power or cable | ✅ High | Measure transducer supply and gap voltage | Check probe gap and cable connections |
| False high vibration | Improper filtering | ✅ High | View waveforms in software | Adjust filter settings per machine |
| Channel not alarming | Setpoint configuration | ✅ High | Verify alarm levels in software | Adjust and test setpoints |
| Erratic signal | Grounding issue | ✅ Medium | Check shield grounding | Follow single-point grounding rules |
| Module fault | I/O module failure | ✅ Medium | Swap I/O if available | Test with known good transducer |
View live waveforms and gap voltages in the configuration software for quick diagnosis.
6. Frequently Asked Questions (FAQ)
What transducers can the 350042 accept? It supports Bently Nevada proximity probes (3300 XL series) and seismic transducers (velocity or acceleration). Different I/O modules support various input types.
How many measurements per channel? Each channel can be configured for a primary measurement (vibration or position) with secondary parameters available.
Is this the same as the 3500/40? The 3500/42 adds seismic input capability and more flexible channel configuration options compared to the basic Proximitor monitor.
Can I hot-swap this monitor? Generally yes. The system is designed for online replacement with minimal disruption when done correctly.
Do I need special software for configuration? Yes. Use the 3500 System Configuration Software to set up channels, filters, and alarm setpoints.
How do you test these monitors? We connect standard transducers or signal simulators, verify scaling, alarm activation, and waveform accuracy across all channels.
Why is the 3500/42 a common spare? It is one of the most frequently used monitor types for vibration protection. Having a tested spare reduces risk on critical machines.
