Bently Nevada 140734-08 3500/72M Position Monitor

Bently Nevada 140734-08 3500/72M Position Monitor

The Bently Nevada 140734-08, also cataloged as the 3500/72M Recip Rod Position Monitor, serves as the primary 3500/72M monitoring module utilized to execute reciprocating rod position measurement and alarm processing across Bently Nevada 3500 monitoring platforms.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics Monitoring

The 3500/72M Recip Rod Position Monitor conditions input signals from proximity and seismic transducers to provide vibration and position measurement values. The module processes conditioned signals and compares measured parameters against configured alarm setpoints for machinery protection logic.

The monitor supports rotor dynamics and mechanical position analysis through configurable measurement channels. Supported monitoring parameters include radial vibration, REBAM, thrust position, acceleration, differential expansion, shaft absolute vibration, eccentricity, circular acceptance region, and velocity.

Signal processing functions include fixed peak-to-peak filtering from 1 Hz to 600 Hz and gap filtering with a 3 dB point at 0.09 Hz. The module communicates processed machine information through the 3500 rack system interface for operational and maintenance monitoring.

Frequently Asked Questions

Q: How many input channels are available on the 3500/72M monitor?
A: The 3500/72M monitor is configured as a four-channel monitoring module accepting proximity and seismic transducer inputs.

Q: What type of parameters can be configured for monitoring?
A: The module can be configured for measurements including vibration, thrust position, acceleration, differential expansion, shaft absolute vibration, eccentricity, velocity, and related machine position parameters.

Q: What environmental storage conditions are specified for this module?
A: The module storage temperature range is -40 deg C to +85 deg C with humidity up to 95% non-condensing.

Field Installation Guidelines

Install the monitor module in the designated 3500 rack slot and verify correct mechanical engagement with the rack backplane connector. Confirm rack power availability and module addressing before commissioning.

Route proximity and seismic transducer wiring separately from high-current switching conductors to reduce signal interference. Maintain proper cable shielding and grounding practices according to the monitoring system installation requirements.

Configure measurement channels using 3500 Rack Configuration Software after installation. Verify input signal levels, alarm setpoints, and communication status before placing the monitoring channel into service.