he Bently Nevada 330881-28-00-125-00-02, also cataloged as the PROXPAC XL Proximity Transducer, operates as a dedicated hardware component for high-precision vibration and shaft position monitoring within industrial rotating machinery platforms.

Model Suffix Breakdown

The assembly configuration is defined by the following specifications:

• 330881: Base model designation

• 28: Housing and material configuration

• 00: Standoff adapter option (None)

• 125: Probe length (125 mm)

• 00: Agency approval standard

• 02: Interface and connector configuration

Hardware Specifications

Mechanical Monitoring and TSI Characteristics

The PROXPAC XL system utilizes an integrated 8 mm eddy-current probe for non-contacting measurements. To ensure signal accuracy, the system requires precise eddy-current probe scaling within the TSI software interface. Operators must perform gap voltage validation, targeting -10 VDC at the linear range center to maintain system linearity. The PPS housing, reinforced with conductive fibers, provides inherent electrostatic charge dissipation, which minimizes signal noise in high-speed rotating machinery applications where rotor dynamics are critical.

Ordering Info

• 1 x 330881-28-00-125-00-02 PROXPAC XL Proximity Transducer

• 2 x Plugs for unused conduit entries

• 2 x Mounting washers

• 1 x Technical documentation and installation guide

Field Installation Guidelines

• Housing Integrity: Verify the IP66/Type 4X seal integrity during installation to prevent environmental ingress in severe industrial conditions.

• Mounting Stability: Secure the transducer housing using the provided hardware; ensure there is no mechanical resonance between the housing and the machine frame.

• Grounding: Utilize the conductive properties of the PPS housing to maintain a path for electrostatic dissipation; ensure adequate bonding to the machine case.

• Cable Management: Route output signals through shielded pathways to prevent electromagnetic interference.

Frequently Asked Questions

• What is the advantage of the PPS housing? Polyphenylene Sulfide offers superior mechanical strength and chemical resistance compared to traditional steel/aluminum housings.

• Does this transducer support hot-swapping? No, electrical connections must be isolated before removing the transducer from the monitor circuit.

• Is the 8 mm probe interchangeable? The probe is factory-integrated into the PROXPAC XL assembly and is not designed for field replacement.

• How do I verify the gap voltage? Access the Proximitor output terminals and use a high-impedance voltmeter to confirm the -10 VDC target.

• Can it be used in washdown areas? Yes, the IP66 rating confirms suitability for environments exposed to dust and water spray.

• What is the impact of the conductive fibers in the housing? They assist in managing electrostatic buildup, reducing the risk of discharge-induced signal noise.

• Are the plugs and washers required for all installations? The plugs must be installed in any unused conduit ports to maintain the IP66 rating.

• Can I use this with legacy 3300 systems? The PROXPAC XL is designed for integration into modern 3300 XL monitoring platforms; verify compatibility with monitor channel card firmware.