EPRO PR6423/00M-030 Proximity Sensors

The EPRO PR6423/00M-030, also cataloged as the PR6423 Proximity Sensors, operates as a dedicated hardware component for non-contact shaft displacement and vibration measurement within TSI machinery protection systems.

Suffix Breakdown & Model Matrix

The model number configuration defines physical dimensions, sensing characteristics, and integral cable configuration:

• PR6423: Base model series for EPRO eddy current proximity transducers.
• 00M: Designates an 8 mm probe tip diameter, establishing the target measuring range and spatial resolution characteristics.
• 030: Specifies an integral cable assembly with a total uncompensated cable length of 3.0 meters terminating at the signal converter connector.

Hardware Specifications

Eddy-Current Probe Scaling & Gap Voltage Validation

The 8 mm sensing tip emits a high-frequency electromagnetic field that interacts with conductive target surfaces, converting physical gap changes into proportional impedance variations. External signal converters process these raw high-frequency interactions into standardized linear process outputs. Field technicians perform gap voltage validation by measuring the unconditioned DC bias voltage across the signal converter terminals, adjusting the threaded probe position mechanically to achieve target values such as -10 VDC. This gap setting establishes linear scaling over dynamic shaft excursions while ensuring cross-talk suppression between adjacent radial and axial probes.

Frequently Asked Questions

Q: Does the PR6423/00M-030 sensor output a conditioned process signal directly?

A: No, the PR6423/00M-030 functions as a passive transducer that outputs a raw high-frequency impedance signal, requiring connection to an external EPRO signal converter to produce a linear voltage or current output.

Q: What physical configurations are designated by the "00M" and "030" suffixes?

A: Suffix "00M" designates an 8 mm probe tip diameter, while suffix "030" indicates a 3.0-meter total uncompensated cable length attached to the transducer housing.

Q: How do technicians maintain signal integrity along the 3.0-meter coaxial cable run?

A: Technicians route the coaxial cable inside dedicated grounded metal conduits, maintain a minimum bend radius of 30 mm, and avoid running signal lines parallel to high-voltage motor supply conductors.

Field Installation Guidelines

Thread the stainless steel probe body into the machine housing or mounting bracket using the metric thread interface. Advance the sensor tip toward the shaft target while observing the DC gap voltage at the signal converter output terminals until reaching the specified target setting (such as -10 VDC). Tighten the mounting locknut to secure mechanical position.

Route the 3.0-meter integral coaxial cable away from high-current AC wiring and variable frequency drives, keeping a minimum bend radius of 30 mm. Connect the coaxial cable directly to the input terminals of the external EPRO signal converter. Ground the coaxial cable shielding at a single point on the cabinet earthing bar to eliminate ground loops and minimize high-frequency electromagnetic noise.