330104-00-05-20-02-CN | Bently Nevada | 3300 XL 8 mm Proximity Probes

Configured for precision displacement sensing in machinery protection systems, the Bently Nevada 330104-00-05-20-02-CN (330104 8 mm Proximity Probe) provides direct physical execution of eddy-current distance measurement against rotating metallic targets.

Suffix Breakdown & Model Matrix

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics

The 3300 XL system relies on eddy-current probe scaling to convert target proximity into a linear voltage output. The transducer must be installed with a consistent gap to ensure accurate measurement of shaft displacement and vibration. During the commissioning phase, gap voltage validation against -10 VDC targets is mandatory to ensure the signal remains within the linear operating range of the Proximitor sensor. Proper cross-talk suppression is achieved by maintaining physical separation between multiple probes mounted in the same radial plane to prevent mutual interference from the electromagnetic carrier fields.

Frequently Asked Questions

Q: Can the 2.0 metre integral cable be shortened or spliced in the field?

A: No. The probe, cable, and connector assembly are factory-calibrated as a matched set. Splicing or modifying the cable length alters the electrical capacitance and impedance, which renders the calibration invalid and will introduce measurement errors.

Q: What are the installation requirements for the ClickLoc coaxial connector?

A: The connector must be hand-tightened until full metal-to-metal contact is achieved. The use of pliers or wrenches can cause mechanical deformation of the threads or internal pins, leading to intermittent signal connections and increased contact resistance.

Field Installation Guidelines

• Mounting: Ensure the probe is mounted in a rigid bracket to prevent mechanical vibration from being misinterpreted as shaft displacement.
• Cable Routing: Route the coaxial cable through dedicated instrumentation conduit or cable trays. Maintain physical separation from high-voltage AC power lines to minimize induced electromagnetic noise.
• Grounding: Verify that the shield remains continuous throughout the cable run. The system must be grounded only at the monitor terminal to avoid ground loops that interfere with low-level signal acquisition.
• Verification: Confirm the gap voltage using a digital multimeter at the monitor input before machine start-up to ensure the probe is centered within the target linear operating range.