Configured for enclosed shaft vibration and axial position measurement in heavy industrial machinery, the Bently Nevada 330881-16-00-262-06-02 (330881-16-00-262-06-02 PROXPAC XL Proximity Transducer,Metric) provides direct physical/electrical execution.

Suffix Breakdown and Configuration Matrix

• Base Model: 330881
• Probe and Approvals Option: 16 (3300 XL 8 mm probe without approvals)
• Standoff Adapter Option: 00 (No standoff adapter)
• Probe Penetration Option: 262 (262 mm penetration length)
• Fittings Option: 06 (One 3/4-14 NPT fitting, one 3/4-14 NPT to 1/2-14 NPT SST reducer, and two plugs)
• Mounting Thread Option: 02 (3/4-14 NPT process connection thread)

Hardware Specifications

Mechanical Monitoring and Rotor Dynamics Architecture

Engineered for rugged machinery protection housings, this assembly relies on accurate eddy-current probe scaling to convert shaft relative motion into proportional voltage signals. Gap voltage validation targets a nominal -10 VDC baseline at initial installation to guarantee full linear range response. Multi-probe setups utilize strict cross-talk suppression techniques to prevent high-frequency electromagnetic interference, preserving the integrity of underlying rotor dynamics diagnostics.

Ordering Information

• 1 x 330881-16-00-262-06-02 PROXPAC XL assembly unit
• 1 x 3/4-14 NPT fitting and reduction hardware set
• 2 x Threaded sealing plugs

Field Installation Guidelines

• Thread Engagement: Apply a minimum of five full thread engagements using approved thread sealant on NPT connections to maintain pressure boundary integrity.
• Housing Grounding: Secure the metal enclosure directly to machine earth ground to eliminate common-mode electrical noise on the signal loop.
• Penetration Alignment: Verify the 262 mm probe penetration depth matches mechanical clearance requirements prior to final locking.
• Conduit Routing: Isolate output signal cables inside dedicated metallic conduits away from high-current motor feeders.

Frequently Asked Questions

• What is the primary operational purpose of the PROXPAC XL transducer assembly?

  It provides a fully enclosed, weather-proof housing for an 8 mm eddy-current probe used in harsh industrial machinery environments.

• How is the internal probe gap adjusted during mechanical setup?

  The internal probe position is adjusted via threaded internal mechanisms until a stable -10 VDC gap voltage is observed at the monitor output.

• What thread standard is utilized for the primary process connection?

  The unit incorporates a 3/4-14 NPT male mounting thread for secure attachment to machinery housings or thermowell adapters.

• Does the assembly require an external power supply directly at the housing?

  No, power is delivered remotely through the connected proximitor sensor loop circuit rather than at the mechanical enclosure itself.

• What precautions should be taken when sealing the NPT conduit fittings?

  Use compatible thread sealants sparingly to prevent excess compound from entering the probe cavity and interfering with target measurements.

• Can this assembly operate in environments with high ambient vibration?

  Yes, the ruggedized housing and internal damping elements are engineered to withstand severe mechanical vibration without signal degradation.

• What is the function of the included SST reducer fitting?

  It allows transition from the 3/4-14 NPT port down to a 1/2-14 NPT conduit connection for standardized field wiring runs.

• Is field recalibration necessary when replacing the internal 8 mm probe component?

  Yes, matching probe and extension cable electrical lengths must be verified to maintain system linearity and scale factor accuracy.