Description
Product Specifications
- Manufacturer: Bently Nevada (Baker Hughes)
- Model Number: 3500/42M
- Function: Proximitor/Seismic Monitoring
- Input Signals: Proximitor sensors, Seismic transducers (Accelerometers/Velocimeters)
- Channel Count: 4-channel programmable monitor
- Signal Conditioning: Peak-to-peak vibration, Thrust, Velocity, and Acceleration
- Rack Compatibility: Bently Nevada 3500 Series Monitoring System
- Key Feature: Support for Prox/Seismic (Mrox/Sei) dual-purpose configuration
The Bently Nevada 3500/42M is a high-performance four-channel monitor designed to provide continuous, online machinery protection by processing signals from various vibration transducers. It serves a dual role by accepting inputs from both proximity probes and seismic sensors, allowing it to measure everything from shaft vibration and position to casing velocity and acceleration. The module is engineered to compare these monitored parameters against programmable alarm setpoints, triggering safety shutdowns or alerts via the 3500 rack backplane to prevent catastrophic machine failure.
Model Comparison and Distinctions
The 3500/42M is an advanced “M” (Multimode) version that replaces the older, non-M 3500/42 series, offering significantly higher data resolution and faster alarm response times. Unlike basic vibration monitors, the 3500/42M features the specific “Mrox/Sei” (Proximitor/Seismic) flexibility, meaning it can be software-configured for multiple monitoring types without hardware changes, unlike the 3500/40M which is dedicated primarily to Proximitor sensors. Furthermore, this module includes internal logic for “OK” status checking and transducer conditioning that is more robust than third-party alternatives, ensuring it maintains the strict API 670 standards required for critical turbomachinery protection.
