EPRO PR6423/109-110 Eddy Current Probe

Configured for non-contact shaft displacement and vibration measurement in turbomachinery protection systems, the EPRO PR6423/109-110 (PR6423 Eddy Current Sensor) provides direct physical/electrical execution.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics Integrity

The PR6423/109-110 sensor utilizes electro-magnetic eddy-current probe scaling principles to convert target clearance variations into linear electrical load impedance shifts. Designed to monitor dynamic vibration and axial positioning during high-speed rotor dynamics events, the transducer maintains linear response characteristics across its measuring path. Proper gap voltage validation (setting static bias output near -10 VDC during zero-point shaft positioning) ensures adequate voltage swing capacity without clipping dynamic peaks. Balanced electromagnetic coil construction achieves high cross-talk suppression when mounted in dual-axis X-Y orthogonal configurations on turbine bearing pedestals.

Frequently Asked Questions

Q: What static bias voltage target should be verified during physical probe positioning?

A: Adjust the sensor gap relative to the target shaft until the signal driver or transmitter output reads the designated static gap voltage target (typically -10 VDC at mid-range) prior to torquing the mounting locknuts.

Q: How do target surface defects impact dynamic measurement integrity?

A: Scratches, keyways, tool marks, and residual magnetism alter local metallic permeability. These mechanical irregularities produce false electrical runoff spikes on the dynamic vibration signal output.

Field Installation Guidelines

• Target Area Inspection: Ensure the shaft target track is smooth, polished, and demagnetized to avoid parasitic electrical runoff signals during shaft rotation.
• Mechanical Mounting & Clearance: Secure the sensor body firmly in a rigid bracket to prevent structural resonance. Maintain adequate side clearance around the sensing tip to prevent uncalibrated metallic loading from surrounding structures.
• Cable Strain Relief and Shielding: Route extension cables through grounded metallic conduit, keeping distance from high-voltage supply wiring. Terminate cable shields at a single chassis ground point at the panel end to prevent ground loops.