EPRO PR6423/013-000-CN Current Proximity Sensors

Configured for radial and axial shaft dynamic displacement measurement in turbomachinery protection platforms, the Emerson PR6423/013-000-CN (PR6423 Eddy Current Sensor) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

Hardware Specifications

4-20 mA HART Loop Protocol & Process Interface

The Emerson PR6423/013-000-CN system operates in conjunction with dedicated signal converters to translate electromagnetic impedance shifts into calibrated measurement signals. When integrated into industrial transmitter networks, the conditioned vibration or displacement signal utilizes a 4-20 mA HART loop protocol to transmit real-time shaft dynamics directly to DCS input cards. High channel-to-channel isolation safeguards the signal loop against ground potential differences across field wiring runs, ensuring stable data transmission from turbine bearings to control room enclosures.

Frequently Asked Questions

Q: How is the physical air gap set during mechanical installation?

A: Thread the probe into the mounting frame until the initial air gap reaches approximately 0.5 mm (20 mils), corresponding to the baseline DC bias voltage specified by the connected signal converter card. Lock the mounting nut once this gap voltage is achieved.

Q: Can the integral cable on the PR6423/013-000-CN be modified or spliced in the field?

A: No. Altering integral cable length changes total system inductance and capacitance, destroying factory tuning and causing deviations from the 8 V/mm scale factor.

Field Installation Guidelines

1. Inspect the PEEK sensing tip and threaded body for scratches, contamination, or thread galling prior to installation.
2. Confirm the mounting bracket tapping is clean, burr-free, and correctly aligned with the shaft centerline.
3. Maintain a minimum radial clearance of 15 mm surrounding the PEEK tip to prevent false loading from surrounding metal walls.
4. Carefully thread the probe into position while measuring the live DC gap voltage at the signal converter terminals.
5. Once the required zero gap voltage is established, lock the outer jam nut to a maximum torque of 12 Nm without allowing the probe casing to rotate.
6. Route the triaxial cable through grounded conduit, isolated from high-voltage AC lines and variable frequency drive cables.
7. Connect all wiring inside IP67-rated enclosures, terminating the cable shield drain wire at the monitoring rack frame end only.