Overview
The Emerson EPRO CON021 + PR6423/001-011-CN, also cataloged as the PR6423/001-011-CN Eddy Current Proximity Sensor System, operates as a dedicated hardware component for non-contact shaft displacement and vibration measurement within EPRO machinery protection monitoring systems. The assembly combines the PR6423 eddy current probe with a CON021 signal converter for processing dynamic gap signals from rotating machinery.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | CON021 + PR6423/001-011-CN |
| Brand | Emerson EPRO |
| Product Type | Eddy Current Proximity Sensor System |
| Measurement Principle | Eddy current non-contact displacement measurement |
| Sensor Function | Shaft vibration, radial displacement, axial position and eccentricity measurement |
| Linear Measurement Range | 2 mm |
| Incremental Scale Factor (ISF) | 8 V/mm (203.2 mV/mil) +/- 5% |
| Frequency Response | 0 to 20,000 Hz (-3 dB) |
| Operating Temp | Sensor: -35 deg C to +200 deg C; Converter: -25 deg C to +85 deg C |
| Protection Rating | IP66 for sensor head and housing |
| Origin | Germany |
| Signal Interface | Eddy current probe signal conditioning through CON021 converter |
EPRO Eddy Current Measurement and TSI Signal Processing
The PR6423/001-011-CN operates as part of an EPRO TSI (Turbomachinery Supervisory Instrumentation) measurement chain. The eddy current probe generates a high-frequency electromagnetic field to detect the distance between the probe tip and the rotating shaft surface. The CON021 converter conditions the probe signal and provides a proportional output signal for vibration and displacement monitoring.
The measurement chain requires correct probe gap adjustment and signal scaling verification during commissioning. Gap voltage validation is performed according to the configured EPRO measurement characteristics, with typical eddy current systems using a negative DC gap voltage reference around -10 VDC for the calibrated operating point. Proper scaling allows the monitoring system to correlate electrical output changes with mechanical shaft movement.
The sensor design supports rotor dynamics analysis by providing displacement signals related to shaft vibration behavior, mechanical eccentricity, and relative movement between rotating and stationary components. Signal installation should consider cable routing and separation from high-current switching conductors to reduce electrical interference and measurement distortion.
Frequently Asked Questions
Q: What measurement principle does the PR6423/001-011-CN use?
A: The PR6423/001-011-CN uses eddy current measurement technology. It detects shaft displacement by measuring changes in the electromagnetic field between the probe tip and the conductive target surface.
Q: What is the function of the CON021 module in this assembly?
A: The CON021 operates as a signal conditioning converter. It processes the eddy current probe output and provides a conditioned measurement signal for machinery monitoring systems.
Q: What installation factors affect measurement accuracy?
A: Probe gap setting, cable routing, target surface condition, and electrical grounding practices affect measurement accuracy. Shielding and proper signal cable installation help maintain signal quality.
Field Installation Guidelines
Install the PR6423 probe with the sensing tip aligned toward the monitored shaft surface according to the mechanical drawing and application requirements.
Verify the probe gap adjustment before operation. The measurement chain should be checked for correct electrical output response during shaft position changes or controlled movement tests.
Route the sensor cable separately from high-voltage power cables, motor drive outputs, and switching circuits. Connect cable shielding according to the system grounding design to reduce electromagnetic interference.
Install the CON021 converter in an appropriate control cabinet environment with suitable terminal access, protection, and wiring separation from high-noise electrical equipment.
Reviews
There are no reviews yet.