Bently Nevada 3500/72M-01-00 176449-08 Rod Position Monitor

This four-channel monitor provides continuous protection for reciprocating compressors by tracking piston rod position. It accepts input from proximity transducers to measure both dynamic and static rod movements. The monitor compares conditioned signals against user-programmable alarms to safeguard critical machinery .

Channel Configuration and Measurement Modes

The Bently Nevada 3500/72M-01-00 176449-08 supports up to four proximity probe input channels, each with a 10 kΩ impedance . You can configure channels in pairs to perform rod position, rod drop, or hyper-compressor measurements . The module processes signals to generate key parameters like Position Magnitude, Pk-Pk Displacement, and Gap voltage . It also provides Crank Angle data for precise timing analysis .

Technical Specifications

Signal Processing and Alarm Functions

The monitor employs a fixed 1 Hz to 600 Hz peak-peak filter for vibration data, while a 0.09 Hz gap filter handles static position measurements . Notch filters reject 1X and 2X running speed components with high attenuation . Users can set Alert levels for each measured value and Danger levels for any two active values . Alarm delays range from 1 to 60 seconds for Alert and can be set to 0.1 second intervals for Danger .

System Integration and Application Use

This module meets API 618 requirements for reciprocating compressor monitoring . It integrates into the Bently Nevada 3500 rack system and works with System 1 software for advanced diagnostics . Front-panel LEDs indicate OK, TX/RX, and Bypass status for quick troubleshooting . The module provides buffered transducer outputs via coaxial connectors on the front panel . It serves critical reciprocating machinery in oil and gas, petrochemical, and power generation applications .