Configured for radial vibration and axial position measurement in rotating machinery, the Bently Nevada 330171-08-24-10-02-00 (330171 Proximity Probe) provides direct physical execution of displacement sensing via eddy-current induction within 3300 XL monitoring systems.

Configuration Model Matrix

The 330171-08-24-10-02-00 component specification is defined by the following hardware parameters:

• 08: 8 mm probe tip diameter.

• 24: 24 mm case length (threaded).

• 10: Total case length (threaded).

• 02: Standard connector assembly.

• 00: No agency approval options.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics

The 3300 XL proximity system utilizes eddy-current probe scaling to translate target surface displacement into a proportional voltage. To maintain the accuracy of rotor dynamics measurements, the probe must be positioned such that the gap voltage reaches a target of -10 VDC at the Proximitor sensor output. Any variation in the target material (e.g., changes in steel alloy composition) or the probe mounting geometry can introduce non-linearity. Cross-talk suppression is maintained by ensuring that adjacent probes are spaced according to manufacturer guidelines, preventing mutual interference between high-frequency carrier signals.

Ordering info

• 1 x 330171-08-24-10-02-00 8 mm Proximity Probe

• 1 x Stainless steel lock nut

• 1 x Calibration data sheet

Field Installation Guidelines

• Mounting: The probe must be installed in a rigid, non-conductive bracket to avoid parasitic capacitance or resonance that could corrupt vibration data.

• Gap Validation: Verify the output voltage at the Proximitor terminals. Adjust the mechanical probe position until the reading is -10 VDC nominal gap.

• Cable Integrity: Protect the coaxial cable from sharp bends. Maintain a minimum bend radius of 25 mm to preserve the 75 Ohm characteristic impedance.

• Grounding: Ensure the housing maintains electrical contact with the machine case, unless isolation is required by the specific monitor configuration to mitigate ground loops.

Frequently Asked Questions

• Q: Can this probe be used for high-speed turbine monitoring?

  A: Yes, it is designed for detecting vibration and position in high-speed rotating shafts.

• Q: Does the probe tip require a protective cover?

  A: While rugged, a protective cap should be used during transport to prevent damage to the PPS tip surface.

• Q: What is the maximum linear range?

  A: The linear range is 2 mm, consistent with standard 8 mm diameter proximity probe designs.

• Q: Can I modify the probe cable length?

  A: No. Modifying the cable length changes the system impedance, which causes phase shift and gain errors in the measured vibration data.

• Q: What is the impact of paint on the probe tip?

  A: Any foreign material on the tip, including paint or excessive oil buildup, will dampen the eddy-current field and degrade sensing accuracy.

• Q: Is this probe compatible with older 3300 series Proximitors?

  A: No, it is specifically calibrated for the 3300 XL system impedance; mixing legacy and XL components will cause signal measurement failure.

• Q: Why is stainless steel used for the housing?

  A: AISI 303 stainless steel provides excellent chemical resistance and mechanical stability in demanding industrial environments.

• Q: How do I identify a faulty probe?

  A: A faulty probe typically presents as a non-responsive gap voltage (e.g., 0 VDC or negative rail saturation) at the Proximitor output.