Description

The Bently Nevada 330103-00-20-10-02-00, also cataloged as the 330103 Proximity Probe, operates as a dedicated hardware component for contactless eddy-current displacement measurements within 3500 and 3300 Monitoring Systems.

Hardware Specifications

Eddy-Current Probe Calibration and Gap Voltage Validation

The probe assembly requires precise eddy-current probe scaling to convert physical displacement into an electrical signal. During physical installation, field technicians must perform gap voltage validation to ensure the sensor operates in the center of its linear range. Adjusting the mechanical position of the 8.0 mm tip until the Proximitor output registers a target of -10 VDC establishes the optimal equilibrium point for analyzing rotor dynamics. This calibration minimizes signal cross-talk suppression issues and counteracts cross-talk from adjacent metallic components when multiple probes monitor the same shaft location.

Frequently Asked Questions

Q: What does the -00-20-10-02-00 suffix signify in the physical configuration?

A: The option codes define specific mechanical attributes: -00 specifies a 0.0 inch unthreaded length; -20 designates a 2.0 inch overall case length; -10 sets the total length to 1.0 meter; -02 adds a miniature coaxial ClickLoc connector; and -00 defines standard brass thread construction with no fluid leakage armor options.

Q: Can this probe connect directly to a 3500/42M monitor without an intermediate Proximitor Sensor?

A: No, the probe behaves as a purely passive inductive element. It requires a 3300 XL Proximitor Sensor to supply the high-frequency RF signal and demodulate the return voltage before routing to any rack monitor.

Field Installation Guidelines

• Mechanical Engagement: Thread the probe into the bracket by hand until the tip nears the target material. Utilize a calibrated digital multimeter connected to the Proximitor output terminals to verify the -10 VDC gap voltage before locking the jam nuts.
• Torque Limits: Do not exceed 11.2 N-m (100 in-lb) of torque when tightening the 3/8-24 locknuts to prevent structural distortion of the threaded case.
• Connector Integrity: Clean all ClickLoc coaxial joints with an approved electronics contact cleaner before mating. Do not use pliers to tighten the coaxial connector; hand-tighten until the internal mechanism clicks into place.
• Shield Grounding: Insulate the coaxial connection point using the supplied silicone boot or self-fusing tape to prevent unintended grounding against the machine housing or conduit walls. Terminate the overall extension cable shield only at the monitor rack instrumentation ground bar.