Description

The Bently Nevada 330801-28-05-101-03-02, also cataloged as the 330801 PROXPAC XL Proximity Transducer Assembly, serves as the primary 3300 XL Proximity Transducer system utilized to execute non-contacting displacement and vibration measurements across 3300 Machinery Protection System platforms.

Suffix Breakdown & Model Matrix

The 330801 variable matrix configuration dictates the integrated probe properties, housing dimensions, and local fitting architectures:

• 28 (Probe Option): Integrated 3300 XL 8 mm probe with multiple hazardous area agency approvals.
• 05 (Standoff Adapter Option): 0.5 inches (13 mm) anodized aluminum standoff body.
• 101 (Probe Sleeve Option): 10.1 inches (257 mm) overall physical sleeve penetration length.
• 03 (Fittings Option): Includes one 3/4-14 NPT adapter fitting, one 3/4-14 NPT to 1/2-14 NPT stainless steel reducer, and two sealing plugs.
• 02 (Mounting Thread Option): 3/4-14 NPT external casing mounting thread configuration.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics Integration

The integrated packaging houses the internal 3300 XL Proximitor sensor directly within the thermoplastic cover. Consequently, this self-contained design eliminates intermediate coaxial extension cables, reducing loop impedance errors during automated eddy-current probe scaling. The direct connection optimizes signal fidelity for real-time gap voltage validation (-10 VDC targets) relative to the industrial shaft. Furthermore, the glass-and-fiber infused PPS housing delivers comprehensive electrostatic dissipation and native cross-talk suppression, preventing adjacent electromagnetic noise fields from altering transient rotor dynamics signals.

Frequently Asked Questions

Q: Does the self-contained loop design require dedicated field calibration across the 2.0 mm linear span?

A: No, the integrated hardware is factory-calibrated to an AISI 4140 steel target. The assembly maintains complete interchangeability parameters, allowing direct machinery insertion without bench-top tuning.

Q: What are the electrical consequences of operating the module with a supply voltage more positive than -23.5 VDC?

A: Supplying power at a level more positive than -23.5 VDC restricts the upper operational envelope of the probe loop. This degradation clips high-amplitude dynamic signals and shortens the nominal 80 mils linear range.

Field Installation Guidelines

• NPT Thread Engagement: Apply thread compound to the 3/4-14 NPT mounting adapter and engage a minimum of 5 threads into the machine casing wall.
• Locknut Mechanical Torque: Tighten the primary sleeve positioning hex nut to 34 N-m to maintain rigid physical penetration depths against structural vibration.
• Target Clearance Boundaries: Ensure an open structural radius of at least 15.2 mm exists around the 8 mm probe tip to prevent adjacent metal casings from creating side-view interference.
• Conduit Moisture Prevention: Install external field conduits with a distinct low-point drop loop immediately preceding the entry fitting to bypass condensed moisture.