Overview
The Emerson EPRO CON021 + PR6423/000-031-CN, also cataloged as the PR6423/000-031-CN Eddy Current Proximity Sensor System, operates as a dedicated hardware component for non-contact shaft displacement and vibration measurement within EPRO machinery monitoring systems. The assembly converts eddy current probe signals into conditioned outputs for rotor position, radial vibration, and eccentricity monitoring.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PR6423/000-031-CN with CON021 Signal Converter |
| Brand | Emerson EPRO |
| Origin | Germany |
| Operating Temp | Sensor with 1 m cable: -35 deg C to +200 deg C; Converter: typically -25 deg C to +85 deg C |
| Measurement Principle | Eddy current non-contact displacement measurement |
| Sensor Type | Proximity sensor with signal conditioning converter |
| Linear Measurement Range | 2 mm (static +/- 1.0 mm) |
| Incremental Scale Factor (ISF) | 8 V/mm (203.2 mV/mil) +/- 5% |
| Frequency Response | 0 to 20,000 Hz (-3 dB) |
| Sensor Thread | M10 x 1 |
| Sensor Material | Stainless steel case, PEEK sensor tip, PTFE cable |
| Protection Rating | IP66 sensor housing |
| Measurement Functions | Relative shaft vibration, axial position, eccentricity measurement |
EPRO Eddy Current Measurement Technology
The PR6423/000-031-CN uses an eddy current measuring circuit to detect changes in the electrical field between the probe tip and the rotating shaft surface. The probe displacement changes the oscillation characteristics of the sensor circuit, and the CON021 converter processes the high-frequency signal into an output suitable for machinery monitoring systems.
For EPRO turbomachinery monitoring applications, probe calibration depends on eddy-current scaling characteristics, probe target material, and installation gap adjustment. The measurement chain requires correct gap voltage validation to maintain accurate vibration and position signals. Signal stability also depends on proper cable routing and separation from high-current switching conductors.
Frequently Asked Questions
Q: What measurement signals can the PR6423/000-031-CN system provide?
A: The system measures relative shaft displacement signals, including radial vibration, axial position changes, and eccentricity-related movement through an eddy current proximity measurement circuit.
Q: Does the PR6423/000-031-CN require physical contact with the rotating shaft?
A: No. The PR6423 probe operates as a non-contact eddy current sensor and measures displacement through electromagnetic field variation between the probe tip and the target surface.
Q: What installation factors affect measurement accuracy?
A: Probe gap adjustment, target surface condition, cable routing, shielding, and grounding practices affect signal quality and measurement stability.
Field Installation Guidelines
- Install the PR6423 probe with the specified M10 x 1 mechanical mounting interface and maintain stable mechanical positioning.
- Verify the probe gap adjustment before commissioning the measurement chain.
- Route probe extension cables separately from high-voltage power cables and switching circuits to reduce electromagnetic interference.
- Connect cable shielding according to the monitoring system grounding requirements.
- Confirm converter wiring polarity and signal connections before applying operating power.
- Check vibration and displacement signals during initial machine operation to verify correct sensor response.
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