The Bently Nevada 330130-040-01-05, also cataloged as the 330130 Extension Cable, operates as a dedicated hardware component for extending the signal transmission path between the proximity probe and the Proximitor sensor within 3300 XL Transducer System platforms.

Model Configuration Logic

The 330130-040-01-05 part number signifies a specific configuration within the 3300 XL series:

• 040: Cable length (4.0 meters).

• 01: Connector option (Miniature coaxial, standard).

• 05: Agency approval option (Standard agency approval).

Physical and Electrical Attributes

Rotor Dynamics and Signal Path Integrity

This cable assembly is a calibrated element of the transducer loop. Bently Nevada 3300 XL systems rely on precise impedance matching to maintain a constant scale factor of 7.87 V/mm (200 mV/mil). The extension cable maintains signal frequency response by minimizing capacitance and preventing electromagnetic interference (EMI) ingress. During commissioning, installers must verify that the total loop length (probe plus extension cable) corresponds to the Proximitor sensor calibration, typically 5 meters or 9 meters. Deviations in impedance or loop length introduce non-linearity and phase shifts in radial vibration and axial position waveforms, which directly impact the accuracy of rotor dynamics analysis and protective trip functions.

Ordering Information

• 330130-040-01-05 Extension Cable assembly

• Protective thread caps for connectors

• Technical documentation packet

Installation Procedures

• Connector Engagement: Ensure that ClickLoc connectors are free of debris. Mate connectors by hand until a mechanical click confirms engagement. Do not use pliers or torque wrenches to tighten coaxial connections.

• Conduit Requirements: Route the cable through grounded rigid metallic conduit to provide shielding and prevent mechanical damage to the coaxial dielectric.

• Bend Radius: Maintain a minimum bend radius of 64 mm (2.5 inches) to prevent deformation of the internal dielectric and associated impedance changes.

• Grounding Protocol: Connect the probe and cable shield to a single-point instrument ground at the instrumentation cabinet to suppress 50/60 Hz noise and ground loops.

Technical FAQ

• Q: Is this cable compatible with 3300 series legacy hardware?

• A: No. The 330130 series is engineered specifically for 3300 XL systems. Compatibility with older Proximitors is not supported due to impedance mismatches.

• Q: Can the 4.0-meter cable be shortened in the field?

• A: No. The cable length is fixed and calibrated to the system impedance. Altering the length will invalidate the 200 mV/mil scale factor.

• Q: What indicates a failure of the extension cable?

• A: Erratic DC gap voltage, loss of raw signal, or excessive noise on the vibration waveform often indicate dielectric failure or shield degradation.

• Q: Are the ClickLoc connectors moisture-proof?

• A: No. The connectors are intended for dry, protected installation. Use a junction box if the cable is routed in areas with oil mist or water spray.

• Q: What is the purpose of the 75 Ohm impedance?

• A: The 75 Ohm characteristic impedance ensures the signal path minimizes reflection and attenuation, maintaining waveform fidelity for high-frequency vibration data.

• Q: Should I use electrical tape on the connections?

• A: Avoid tape. A properly mated ClickLoc connection is sufficient. Taping can trap moisture or contaminants against the connector pins.

• Q: Can I use this cable on a non-conductive machine shaft?

• A: No. The transducer loop requires a conductive target to generate an eddy-current field.

• Q: How is the cable grounded?

• A: The shield is continuous through the connector. Ensure the cabinet termination provides a low-impedance connection to the instrument ground.