Configured for non-contacting displacement measurement in rotating machinery monitoring systems, the Bently Nevada 330101-00-63-10-02-00 (330101 Proximity Probe) provides direct physical signal generation based on shaft surface proximity to the transducer tip.

Model Suffix Configuration Matrix

• 330101: 3300 XL 8 mm Proximity Probe, 3/8-24 thread, without armor.

• 00: Unthreaded Length Option (00 mm).

• 63: Total Case Length Option (6.3 meters).

• 10: Total Length Option (1.0 meter).

• 02: Agency Approval Option (Multiple approvals: CSA, ATEX, IECEx).

• 00: Internal Mounting Thread/Connection Style (Standard mount).

Hardware Specifications

Mechanical Monitoring and Signal Validation

The 3300 XL system relies on precise eddy-current probe scaling to ensure linear output relative to target displacement. Proper installation requires gap voltage validation, where the target operational gap typically centers on a -10 VDC setpoint to maintain linearity within the transducer's 2 mm range. Rotor dynamics analysis, such as shaft centerline and orbital vibration monitoring, depends on the phase-coherent signal transmission through the extension cable and Proximitor sensor. Cross-talk suppression is maintained through high-frequency shielding, preventing interference when multiple probes are installed in close proximity on the same machine casing.

Ordering Information

• 1 x 330101-00-63-10-02-00 Proximity Probe

• 1 x Threaded locknut with safety wire holes

• 1 x Connector protector (pre-installed)

Field Installation Guidelines

• Mounting Stability: Secure the probe using the provided locknut. Ensure the bracket is sufficiently rigid to prevent mechanical resonance at machine operating frequencies.

• Gap Adjustment: Measure the gap voltage during installation. Adjust the probe position until a reading of -10 VDC is achieved at the nominal shaft position.

• Cable Routing: Keep coaxial cables away from high-current AC lines or variable frequency drive cables to minimize induced electromagnetic interference.

• Impedance Matching: Ensure the total length of the probe and extension cable matches the calibrated length for the specific Proximitor sensor being utilized.

Frequently Asked Questions

• What is the nominal scale factor of this probe?

  The nominal scale factor for the 3300 XL 8 mm system is 7.87 V/mm (200 mV/mil).

• Can this probe be used in hazardous locations?

  The 02 suffix denotes compliance with standard hazardous area certifications, including ATEX and IECEx, provided appropriate safety barriers are used.

• Why is the connector protector important?

  It provides environmental sealing for the coaxial connector, preventing moisture and contaminants from impacting signal integrity.

• How should I perform a field check?

  Use a digital voltmeter to verify the gap voltage at the monitor or Proximitor output; ensure it remains within the linear range of -1 VDC to -18 VDC.

• Does the probe require an armored cable?

  This specific model (00 suffix) does not feature internal armor; it should be installed in protective conduit if subjected to physical impact.

• Can this probe detect non-conductive materials?

  No, the eddy-current principle relies on the conductivity and magnetic permeability of the target, typically AISI 4140 steel.

• What happens if the gap voltage is outside the linear range?

  The output signal becomes non-linear or saturates, leading to inaccurate vibration readings and potential alarm faults in the monitoring system.

• How do I identify a faulty probe?

  Disconnect the probe and measure continuity; if the center conductor is open or shorted to the shield, the internal coil or cable is damaged.