Emerson PR6424/010-100 16 mm Eddy Current Sensor

Configured for non-contact vibration and shaft displacement monitoring in rotating machinery, the Emerson PR6424/010-100 (PR6424 16 mm Eddy Current Sensor) provides direct physical/electrical execution. It measures radial dynamic motion and axial shaft position by generating dynamic high-frequency field damping when interfaced with Epro CON021 signal converters.

Hardware Specifications

Eddy-Current Probe Scaling and Gap Voltage Validation

The Emerson PR6424/010-100 requires precise eddy-current probe scaling to convert high-frequency electromagnetic field damping into an accurate position signal across its nominal 4 mm linear measuring range. With a standardized sensitivity of 4 V/mm, proper installation relies on initial gap voltage validation (targeting approximately 2.7 mm mechanical center air gap or -10 VDC static offset via CON021 conditioning hardware) prior to securing the M18 lock nuts. Correct spatial positioning prevents cross-talk suppression degradation from nearby metal casing walls and limits measurement drift caused by shaft runout or structural rotor dynamics.

Frequently Asked Questions

Q: How is the physical air gap set during mechanical installation of the PR6424/010-100?

A: Thread the M18 x 1.5 sleeve into the mounting bracket until the DC gap voltage at the CON021 converter output reads the designated center value (-10 VDC nominal offset, corresponding to an approximate 2.7 mm air gap) before torquing lock nuts.

Q: Can the 5 m integral cable with LEMO connector be modified or spliced in the field?

A: Splicing or trimming the integral cable alters total system capacitance and inductance, which directly corrupts the calibrated 4 V/mm probe sensitivity and introduces non-linear measuring errors.

Q: What structural precautions prevent side-wall interference on the 16 mm probe tip?

A: Maintain a counterbore clearance area around the epoxy tip free of secondary metallic materials to avoid artificial damping of the RF magnetic field.

Field Installation Guidelines

• Thread the M18 x 1.5 stainless steel sleeve into tapped mounting points, ensuring a minimum engagement of 5 full threads before locking with jam nuts.
• Provide at least 30 mm of clear radial space around the 16 mm sensor head to eliminate unwanted eddy-current coupling with surrounding machine housings.
• Route the armored flexible cable through dedicated grounded metallic conduit, observing a minimum bend radius of 35 mm to prevent inner core damage.
• Connect the LEMO plug securely to the driver interface module, keeping the instrument shield grounded exclusively at the monitoring rack end to prevent ground loop noise.