The Bently Nevada 330881-28-00-148-03-02, also cataloged as the 330881-28-00-148-03-02 Proximity Transducer, operates as a dedicated hardware component for non-contacting displacement measurement within 3300 XL PROXPAC transducer systems.

Model Suffix Breakdown

• 330881: Base Model (3300 XL PROXPAC Proximity Transducer)

• 28: Probe Diameter (8 mm)

• 00: Mounting Thread (Standard configuration)

• 148: Total System Length (14.8 meters)

• 03: Connector Type (ClickLoc connector)

• 02: Agency Approval (Multiple international standards)

Hardware Specifications

Mechanical Monitoring & TSI Characteristics

The PROXPAC XL system utilizes eddy-current probe scaling to convert non-contacting shaft displacement into a linearized voltage output. During commissioning, gap voltage validation against -10 VDC targets ensures the probe tip operates within its defined linear measurement range. The system facilitates rotor dynamics analysis by maintaining signal linearity across the air gap. Cross-talk suppression is achieved through frequency-coded probes, which prevent signal interference when multiple sensors are installed in high-density monitoring racks.

## Ordering info

• One (1) 330881-28-00-148-03-02 Proximity Transducer

• Connector thread protection caps

• Installation technical documentation

Field Installation Guidelines

• Housing Mounting: Install the transducer housing to a rigid machine surface; ensure the probe tip is secured at the required gap distance.

• Electrical Termination: Connect the -24 VDC power supply and signal output using shielded cable; ensure correct polarity at the termination points.

• Grounding: Bond the transducer housing to the machine ground reference to ensure stable electrical operation.

• Signal Protection: Route all signal wiring through grounded rigid conduit to mitigate electromagnetic interference from rotating equipment fields.

• Gap Verification: Use a high-impedance voltmeter to verify that the static gap voltage meets the -10 VDC target before machine startup.

Frequently Asked Questions

• Q: Is the PROXPAC XL compatible with standard external Proximitors?

  A: No, the PROXPAC XL integrates the oscillator within the transducer housing, eliminating the requirement for a separate Proximitor unit.

• Q: Can the 14.8 meter cable be modified in the field?

  A: No, the system is factory-calibrated for a specific length; modifying the cable alters the electrical resonance and invalidates the scale factor.

• Q: How do I check for signal integrity?

  A: Observe the RF carrier signal with an oscilloscope or verify that the DC output voltage corresponds to the physical air gap.

• Q: Does this unit support hot-swapping?

  A: The unit can be replaced, provided power is isolated before disconnecting wiring to prevent electrical faults or false alarm triggers.

• Q: What is the maximum signal output distance?

  A: Signal transmission can achieve up to 300 meters using appropriate low-capacitance, shielded instrumentation cable.

• Q: Is this device compatible with third-party monitoring systems?

  A: Compatibility depends on the monitoring system's ability to accept a -24 VDC powered, standard proximity voltage output signal.

• Q: Why is the 14.8 meter cable length specified?

  A: This is the factory-set resonant length required to maintain the specified electrical sensitivity and frequency response.

• Q: How is ground loop noise mitigated?

  A: The system uses a single-point ground connection via the transducer housing to prevent ground loops and electrical noise injection.