Overview
The Emerson PR6426/010-140 CON021/916-240, also cataloged as the PR6426/010-140 CON021 Eddy Current Sensor System, operates as a dedicated hardware component for non-contact shaft displacement measurement within EPRO machine monitoring systems.
The system combines the PR6426/010-140 eddy current probe with the CON021/916-240 signal converter to process electromagnetic displacement signals into proportional electrical outputs. The measurement chain supports vibration, position, and displacement monitoring through direct probe-to-converter signal conditioning.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PR6426/010-140 CON021/916-240 |
| Brand | Emerson / EPRO |
| Weight | 0.88 kg |
| Dimensions | 29 x 23.5 x 4.7 cm (shipping size) |
| Power Consumption | -24 VDC nominal supply for CON021 converter |
| Measurement Principle | Eddy current non-contact displacement measurement |
| Sensor Type | PR6426 series eddy current probe |
| Converter Type | CON021/916-240 signal converter |
| Output Signal | Negative DC voltage output with superimposed AC vibration component |
| Frequency Range | 0 Hz to 20,000 Hz (-3 dB) |
| Response Time | <15 us |
| Output Impedance | 100 kohm |
| Protection Class | IP20 |
| Connection Type | Screw terminals and LEMO sensor connection |
Emerson EPRO Eddy Current Signal Processing Characteristics
The PR6426/010-140 CON021/916-240 measurement chain processes eddy current probe signals through electromagnetic field variation detection. The PR6426 sensor generates a measurement response according to the distance between the probe tip and the conductive target surface. The CON021 converter conditions the high-frequency signal and provides a proportional voltage output for machinery monitoring inputs.
The signal chain supports rotor dynamics analysis by maintaining a direct relationship between shaft movement and electrical output response. During commissioning, technicians verify probe scaling, gap voltage conditions, and signal stability before connecting the measurement output to turbine monitoring or protection systems.
Frequently Asked Questions
Q: What measurement principle does the PR6426/010-140 sensor use?
A: The PR6426/010-140 uses eddy current technology to measure the distance between the probe tip and a metallic target without physical contact.
Q: What function does the CON021/916-240 converter provide?
A: The CON021/916-240 converts the probe electromagnetic signal into a conditioned electrical output suitable for vibration and displacement monitoring circuits.
Q: Can the PR6426 probe operate with other converter types?
A: The probe and converter should be used according to the matched EPRO configuration to maintain the specified measurement characteristics.
Field Installation Guidelines
Install the eddy current probe with correct mechanical alignment toward the monitored shaft or target surface. Maintain a stable mounting position to prevent mechanical movement of the probe body during operation.
Use shielded signal wiring where required and separate sensor cables from high-current power lines to reduce electromagnetic interference. Connect the cable shield according to the site grounding practice and avoid creating unwanted ground loops.
Before operation, verify the probe connection, converter power supply polarity, output signal behavior, and physical clearance between the sensor tip and measurement target.
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