Configured for integrated vibration monitoring in rotating equipment, the Bently Nevada 330881-28-00-100-06-02 (330881-28-00-100-06-02 PROXPAC XL Proximity Transducer) provides direct physical execution of signal conditioning and eddy-current displacement sensing within turbine monitoring (TSI) platforms.

Suffix Breakdown & Model Matrix

The 330881-28-00-100-06-02 adheres to the Bently Nevada PROXPAC XL integrated system nomenclature:

• 330881: PROXPAC XL integrated proximity transducer.

• 28: Probe diameter/thread specification.

• 00: Unthreaded length (0 mm).

• 100: Total case length (100 mm).

• 06: Total system length (6.0 meters).

• 02: Agency approval/options.

Hardware Specifications

Mechanical Monitoring and Probe Integration

The PROXPAC XL system integrates the probe and Proximitor electronics into a single housing, reducing the complexity of external cabling and remote mounting requirements. Proper eddy-current probe scaling is required during commissioning to ensure the integrated output remains linear across the measurement range. Gap voltage validation is mandatory; the target operational setpoint is -10 VDC at the monitor input to ensure the transducer functions within its linear operating curve. The unit includes cross-talk suppression circuitry to prevent interference in high-density sensor installations. This integrated design is suited for rotor dynamics monitoring, shaft centerline position sensing, and radial vibration detection where simplified installation is required.

Ordering info

• One (1) 330881-28-00-100-06-02 PROXPAC XL Transducer.

• Mounting hardware (nuts and lock washers).

• Technical compliance and installation documentation.

• Note: Ensure the power supply is stable at -24 VDC to maintain transducer accuracy.

Field Installation Guidelines

• Mechanical Interface: Mount the transducer through the machine case; use a rigid bracket to prevent mechanical resonance which can induce noise in the vibration signal.

• Gap Setting: Utilize a depth micrometer to establish the mechanical gap; verify the output voltage at the signal terminal (Target: -10 VDC).

• Cabling: Use high-quality shielded cable to connect the integrated transducer to the monitoring rack; keep cables away from AC power lines.

• Grounding: Secure the transducer housing to a clean, low-impedance machine ground to maintain signal shield integrity.

• Thread Management: Torque jam nuts to specification; ensure the lock washers are correctly seated to prevent loosening from machine-induced vibration.

Frequently Asked Questions

• What is the advantage of the PROXPAC XL integrated design?

  The integration of the probe and Proximitor into one housing eliminates the need for separate extension cables and remote Proximitor mounting, simplifying field installation.

• Does this transducer require a remote Proximitor?

  No. The Proximitor electronics are embedded within the transducer housing, reducing overall system cabling.

• What is the target gap voltage for this model?

  The nominal operating gap voltage is -10 VDC, which positions the transducer in the center of its linear sensing range.

• Is the system length (6.0 meters) adjustable?

  No. The system is calibrated at the factory for the specified 6.0 meter length; shortening or lengthening the cable will invalidate the calibration.

• Can I replace the internal probe if it becomes damaged?

  No. The PROXPAC XL is a factory-sealed integrated unit; any failure of the probe or internal electronics requires replacing the entire assembly.

• How do I check for proper operation?

  Monitor the DC output voltage; if the voltage drifts to the power supply rail or fluctuates erratically, it indicates a failure in the sensing or electronics module.

• Is the PROXPAC XL suitable for all hazardous zones?

  The unit has specific agency approvals; verify that the "02" suffix and the overall system ratings meet your specific hazardous area classification.

• Does the transducer require a specific shaft material?

  Yes. Calibration is based on 4140 steel. Using different shaft materials requires a scale factor adjustment to ensure measurement accuracy.