The Bently Nevada 330130-040-00-00, also cataloged as the 330130 Extension Cables, operates as a dedicated hardware component for signal transmission between proximity probes and Proximitor sensors within 3300 XL vibration monitoring architectures. This assembly facilitates the delivery of high-frequency carrier signals, ensuring the preservation of rotor position and vibration data integrity. Engineered for fixed-length electrical impedance matching, the cable provides the physical medium necessary for the transducer system to function within its designated linear measurement range, acting as a critical path for data acquisition in rotating machine diagnostics.

Suffix Breakdown & Model Matrix

• 330130: 3300 XL 8 mm Extension Cable
• 040: 4.0 meters (13.1 feet) total length
• 00: Connector and cable option (Standard)
• 00: Agency Approval (Standard)

Hardware Specifications

Mechanical Monitoring and Transducer Scaling

The 330130 series extension cable is integral to maintaining the accuracy of eddy-current probe scaling in the 3300 XL system. Because the system frequency response depends on the total cable length, this 4.0-meter extension is calibrated to ensure the Proximitor maintains the target -10 VDC gap voltage bias. Maintaining this voltage ensures the system stays within the 2 mm linear range for rotor dynamics analysis. Signal integrity is preserved through high-precision impedance matching, which prevents signal reflection and cross-talk suppression issues that could otherwise lead to erroneous peak-to-peak vibration measurements.

Ordering Information

• 1 x 330130-040-00-00 Extension Cable
• 2 x Protective Connector Caps

Field Installation and Wiring

• Cable Routing:
  • Install cables within dedicated metallic conduits to minimize electromagnetic interference.
  • Maintain a minimum bend radius of 50 mm to avoid deformation of the coaxial geometry.
• Connector Mating:
  • Inspect gold-plated pins for oxidation or debris prior to assembly.
  • Ensure the ClickLoc mechanism is fully engaged until a tactile click is confirmed.
• Shielding and Grounding:
  • Prevent ground loops by ensuring the probe case remains isolated from the machine housing where required by site grounding practices.
  • Ensure all cable shields remain continuous from the probe junction through to the Proximitor sensor interface.

Frequently Asked Questions

• Q: Can the cable be shortened to fit a specific conduit run?

  A: No. Altering the length changes the electrical impedance, which invalidates the calibration of the Proximitor and leads to linear measurement errors.

• Q: Is this cable resistant to synthetic lubricants?

  A: Yes, the FEP jacket provides chemical inertness and stable performance in environments containing typical mineral and synthetic industrial oils.

• Q: What is the purpose of the ClickLoc connector design?

  A: It provides a vibration-resistant interface that maintains constant contact pressure, reducing signal dropout in high-oscillation machinery zones.

• Q: Does cable length affect the gap voltage?

  A: Yes. The total length of the probe and extension cable is factored into the Proximitor calibration; length changes affect the bias voltage.

• Q: How should excess cable length be stored?

  A: Coil excess cable in a wide loop, no less than 100 mm in diameter, to avoid stress on the inner coaxial conductors.

• Q: Is the extension cable shielding grounded?

  A: The shield is designed to be grounded at the Proximitor end; ensure proper installation of the cable shield to the monitor housing.

• Q: Can I mix this cable with older 3300 series components?

  A: This cable is optimized for 3300 XL transducers. Mixing with legacy 3300 series parts may compromise system frequency response.

• Q: What is the maximum operating temperature?

  A: The cable assembly is rated for continuous operation up to 177 deg C, assuming the environment does not exceed the specified thermal limits.