EPRO PR6423/016-110 Shaft Vibration Sensor

Configured for shaft vibration and axial position measurement in turbomachinery protection systems, the Epro PR6423/016-110 (PR6423 Eddy-Current Proximity Probe) provides direct physical execution through non-contact electromagnetic gap sensing.

Suffix Breakdown & Model Matrix

Hardware Specifications

Eddy-Current Probe Scaling & Gap Calibration

The Epro PR6423/016-110 probe relies on precise eddy-current probe scaling to convert target distance into proportional voltage outputs via connected CON-series signal converters. Standard calibration targets a scale factor of 8.0 V/mm (200 mV/mil) when facing AISI 4140 steel. Setting the mechanical uncalibrated gap requires precise gap voltage validation, typically aligning the static DC bias to -10 VDC at the mid-scale operational point of 1.0 mm. Cross-talk suppression is maintained by adhering to minimum mechanical mounting clearances: adjacent probe tips must maintain a distance of at least 25 mm to prevent mutual electromagnetic interference, while side clearances from surrounding metallic housings must exceed 15 mm from the central axis of the PEEK tip.

Frequently Asked Questions

Q: What is the procedure for zeroing the static gap voltage during installation?

A: Mount the probe in the machine housing and thread it toward the target shaft while monitoring the DC voltage output at the connected CON021/CON031/CON041 converter terminal. Adjust probe depth until the signal output reads -10 VDC (or the center bias point specified by the system calibration card), then secure the jam nut to the target torque limit.

Q: Can the PR6423/016-110 integrated cable be spliced or shortened directly in the field?

A: No. Modifying the integrated cable length alters the electrical length, internal capacitance, and system inductance, destroying the factory calibration curve. Total cable extension must be managed exclusively through calibrated extension cables matched to the specific CON converter input impedance.

Field Installation Guidelines

1. Inspect the PEEK tip and stainless steel threaded body for structural damage, contamination, or metal debris prior to insertion.
2. Ensure the mounting hole thread is free from burrs and tapped to match the probe body pitch.
3. Maintain mechanical side clearance of at least 15 mm surrounding the PEEK sensing tip to eliminate false loading from surrounding housing walls.
4. Thread the probe carefully into the housing bracket, adjusting axial position while taking real-time DC gap voltage readings from the driver unit.
5. Once target gap voltage (-10 VDC nominal mid-span) is achieved, lock the outer jam nut to a maximum torque of 12 Nm. Do not allow the probe body to rotate while tightening.
6. Route the integral triaxial cable away from high-voltage AC lines, variable frequency drive outputs, and hot surface conduits exceeding +150 deg C.
7. Secure all cable connectors using IP67-rated sealing boots, ensuring shield drain wires are grounded at the system barrier enclosure side only.