Overview
The Emerson EPRO CON021 + PR6423/003-040, also cataloged as the PR6423/003-040 Eddy Current Transducer System, operates as a dedicated hardware component for shaft vibration and displacement measurement within EPRO machinery monitoring systems. The system converts probe gap variations into electrical signals for vibration, axial position, and speed monitoring circuits.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | CON021 + PR6423/003-040 |
| Brand | Emerson EPRO |
| Origin | Germany |
| Weight | CON021 approximately 120 g; probe weight not specified |
| Operating Temp | CON021: -30 deg C to +100 deg C; PR6423/003-040: -35 deg C to +180 deg C |
| Power Consumption | Supply voltage: -23 VDC to -32 VDC |
| Signal Converter Frequency Range | 0 to 20,000 Hz (-3 dB) |
| Signal Converter Rise Time | Less than 15 microseconds |
| Probe Measurement Range | Up to 4.0 mm |
| Probe Linearity Error | Less than or equal to 2.0% |
| Probe Pressure Limit | Up to 2 bar |
| Protection Class | IP20 for CON021 converter |
| Housing Material | CON021: LMgSi 0.5 F22 aluminum alloy; Probe: Stainless steel |
Eddy Current Signal Processing and TSI Monitoring Characteristics
The CON021 signal converter receives high-frequency signals from the PR6423/003-040 eddy current probe and generates proportional electrical outputs for machinery protection and monitoring equipment. The measurement chain operates through electromagnetic field variation between the probe tip and the rotating shaft surface.
The eddy current circuit requires correct probe scaling and gap calibration to maintain displacement measurement accuracy. The probe output changes according to shaft position variation, allowing the monitoring system to evaluate radial vibration, axial displacement, and rotational movement.
For turbine and compressor monitoring applications, the sensor chain supports rotor dynamics analysis by providing continuous displacement signals from rotating components. Proper cable routing and signal separation help reduce electromagnetic interference and cross-talk effects in multi-channel monitoring installations.
Frequently Asked Questions
Q: What measurement principle is used by the PR6423/003-040 probe?
A: The PR6423/003-040 uses an eddy current measurement principle. It detects changes in the electrical field caused by variations in the distance between the probe tip and the conductive shaft surface.
Q: What electrical output does the CON021 converter provide?
A: The CON021 processes the probe high-frequency signal and converts it into proportional electrical outputs compatible with machinery monitoring and protection systems.
Q: What installation factors affect measurement accuracy?
A: Probe gap adjustment, shaft surface condition, cable routing, and correct electrical grounding affect signal stability and displacement measurement accuracy.
Field Installation Guidelines
Install the PR6423/003-040 probe with the sensing tip aligned toward the target shaft surface according to the mechanical mounting requirements of the monitored equipment.
Maintain separation between eddy current sensor cables and high-power electrical conductors to reduce electromagnetic interference. Connect cable shielding according to the system grounding design and avoid unnecessary shield loops.
Verify the probe gap voltage and converter signal output during commissioning before connecting the measurement channel to the machinery protection system. Confirm that the installed signal direction matches the configured vibration or displacement monitoring logic.
Install the CON021 converter in a suitable control cabinet environment with proper protection against dust, moisture, and mechanical impact according to its IP20 enclosure rating.
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