Description

The Emerson PR6423/101-101 CON031, also cataloged as the PR6423 Eddy Current Sensor, operates as a dedicated hardware component for non-contact shaft displacement and vibration measurement within ePro turbomachinery protection systems.

Suffix Breakdown & Model Matrix

• PR6423: Base non-contact eddy current displacement sensor series.
• /101: Thread/case configuration and total physical length option.
• -101: Integrated cable length and armoring / connector configuration option.
• CON031: Signal converter / transmitter interface matching module.

Hardware Specifications

Process Control & Fieldbus Interface

• The system integrates 4-20 mA HART loop protocol options and direct driver output lines for analog integration into process control systems.
• Features channel-to-channel isolation on associated signal conditioning cards to prevent ground loop noise interference.
• Supports cold junction compensation (CJC) when paired with secondary temperature-compensated transmitter modules.

Frequently Asked Questions

Q: How is ground isolation maintained when mounting the PR6423 probe on heavy machinery?

A: The probe body must be insulated from machine casing potentials using dedicated non-conductive mounting adapters or verified ground isolation sleeves to prevent circulating ground currents from corrupting the high-frequency driver signal.

Q: What is the effect of cable length mismatch between the probe and the CON031 driver?

A: The probe and extension cable system must match the precise electrical length for which the CON031 converter is calibrated. Altering cable length shifts the LC circuit resonance, leading to calibration errors and incorrect output scaling.

Field Installation Guidelines

• Ensure proper mechanical clearance during installation to avoid physical contact with rotating shafts.
• Set initial probe gap voltage target using a calibrated multimeter connected to the signal converter output prior to final lock-nut tightening.
• Route extension cabling through grounded flexible conduit, keeping it separate from high-voltage AC motor lines to eliminate electromagnetic noise interference.
• Maintain minimum thread engagement during probe body installation into machine housings to prevent vibration looseness.