Configured for high-frequency relative displacement monitoring in 3300 XL machinery protection systems, the Bently Nevada 330101-00-18-50-02-05 (330101 Proximity Probe) provides direct physical signal transduction. This hardware captures instantaneous gap distance variations between the probe tip and a conductive target, supplying a modulated radio frequency signal to the Proximitor sensor for data conditioning and analysis.

Model Configuration Matrix

• 330101: 3300 XL 8 mm Proximity Probe

• 00: Unthreaded Length (metric)

• 18: Overall Case Length (metric)

• 50: Total Length (metric)

• 02: Connector Type (Miniature coaxial ClickLoc connector)

• 05: Agency Approval (Multiple approvals)

Hardware Specifications

Mechanical Monitoring & Eddy-Current Dynamics

The probe utilizes eddy-current probe scaling to convert target displacement into a voltage signal. Achieving precision requires strict gap voltage validation; the transducer must be adjusted to a nominal -10 VDC target within the machine's operating range. Cross-talk suppression is maintained by observing physical separation distances between adjacent sensors to prevent interference in the 1 MHz carrier frequency. Rotor dynamics analysis is contingent upon maintaining this linear operation range to prevent waveform distortion.

Ordering Information

• 1 x 330101-00-18-50-02-05 Proximity Probe

• 1 x Connector protector

• 1 x Technical manual

Field Installation Guidelines

• Mechanical Mounting: Torque the mounting jam nut to established specifications to prevent looseness caused by machine vibration.

• Side-View Clearance: Ensure a minimum of 10 mm clearance from the mounting hole wall to avoid peripheral metal interference.

• Cabling: Route coaxial cables through dedicated grounded metallic conduit, separating signal lines from high-voltage AC cabling.

• Connection Integrity: Verify the ClickLoc coupling is fully seated; ensure the connector protector is secure to prevent moisture ingress.

• Signal Validation: Measure the output voltage at the Proximitor sensor terminal block to verify proper gap adjustment during site commissioning.

Frequently Asked Questions

• Q: Are 3300 XL probes interchangeable with legacy 3300 series probes?

  A: No. 3300 XL probes are tuned specifically for the 3300 XL Proximitor sensor frequency response and cannot be interchanged with legacy systems.

• Q: Can the PPS probe tip withstand high-pressure fluid environments?

  A: The probe assembly is rated for operation in pressure environments up to 60 bar, provided proper O-ring sealing is utilized at the thread interface.

• Q: What is the maximum allowable cable length for this probe?

  A: The system is factory-calibrated for a total system length of 5 or 9 meters. Deviating from these lengths impacts frequency response and accuracy.

• Q: How is the probe case grounded?

  A: The probe case is electrically isolated from the signal common. Proper system grounding must be verified according to the specific site wiring diagram.

• Q: Can the probe cable be field-terminated?

  A: No. Cutting or splicing the cable alters the system's characteristic impedance and resonant frequency, leading to inaccurate measurement output.

• Q: What indicates a failed proximity probe?

  A: Failure typically presents as an open circuit or a hard-scale voltage reading (full negative or positive) at the Proximitor sensor output.

• Q: Does the target material affect measurement accuracy?

  A: Probes are calibrated for 4140 steel. Other conductive materials have different magnetic permeabilities and require specific scale factor adjustments.

• Q: What is the purpose of the 1 MHz carrier frequency?

  A: The 1 MHz frequency is optimized for eddy-current penetration depth in standard carbon steel to provide high-fidelity dynamic displacement data.