The Bently Nevada 3500/42M Proximitor Seismic Monitor is a four-channel monitoring module designed for critical machinery condition monitoring. It accepts inputs from proximity and seismic sensors, delivering highly accurate measurements for vibration, position, acceleration, and shaft absolute parameters. The model combination 176449-02 (monitor) with 138708-01 (Shaft Absolute I/O module) offers advanced diagnostics for rotating equipment and protection applications.

Applications

• Steam turbines

• Gas turbines

• Compressors

• Gearboxes

• Motors

• Pumps

This system is ideal for critical rotating machinery in oil & gas, petrochemical, and power generation industries.

Advantages

• Real-time machinery protection with programmable alarms

• High measurement accuracy with broad frequency ranges

• Supports a wide range of measurements: vibration, thrust, eccentricity, REBAM, etc.

• Advanced vector filtering and signal conditioning

• Hot-swappable and rack-based architecture for scalable deployment

• Built-in compatibility with various transducer types (Proximitor, Velomitor, Seismoprobe)

Technical Specifications

Frequently Asked Questions (FAQ)

Q1: What sensors are compatible with the 3500/42M?

A1: It supports Bently Nevada Proximitor, Velomitor, Seismoprobe, and acceleration transducers.

Q2: Can the 3500/42M monitor multiple vibration parameters simultaneously?

A2: Yes, it supports dual-channel configuration per function, enabling concurrent monitoring of up to two parameters (e.g., radial vibration and thrust).

Q3: What is REBAM functionality in this monitor?

A3: REBAM (Rolling Element Bearing Analysis Method) allows high-frequency vibration monitoring for bearing fault detection.

Q4: What is the function of the 138708-01 I/O module?

A4: It provides shaft absolute measurements using proximity and seismic sensors with internal termination.

Q5: Does this module support vector filtering?

A5: Yes, it features programmable 1X and 2X vector filters, Not 1X, and Smax filters for advanced signal analysis.

Q6: What are the standard outputs available on the module?

A6: Buffered transducer outputs (coaxial per channel), 4–20 mA recorder output, and shaft absolute outputs.

Q7: How accurate is the measurement from the monitor?

A7: Most parameters offer typical accuracy within ±0.33% of full scale; vector filters may vary slightly.

Q8: Is the 3500/42M hot-swappable?

A8: Yes, it is designed for hot-swapping within the 3500 rack system without disrupting other channels.

Q9: What is the frequency response range for acceleration?

A9: From 3 Hz to 30,000 Hz, depending on the output type and filter configurations.

Q10: What are the compliance standards met by this product?

A10: EMC Directive 2014/30/EU, LV Directive 2014/35/EU, RoHS Directive 2011/65/EU, and hazardous area approvals per ATEX/IECEx.