Configured for high-frequency signal transmission in 3300 XL monitoring systems, the Bently Nevada 330730-080-00-00 (330730-080-00-00 Extension Cable) provides direct physical electrical continuity between the proximity probe and the Proximitor sensor.

Model Suffix Decomposition

The 330730-080-00-00 part number indicates the following hardware configuration:

• 330730: 3300 XL Extension Cable assembly.

• 080: 8.0 meters total system length requirement.

• 00: Standard connector assembly.

• 00: No agency approval options.

Hardware Specifications

Rotor Dynamics and Signal Integrity

The 3300 XL system accuracy depends on maintaining a precise 75 Ohm impedance path across the transducer loop. Signal integrity is critical for rotor dynamics monitoring; thus, the cable must remain free of splices or abrupt bends that could cause reflections. Eddy-current probe scaling is directly affected by the total cable length, which must be calibrated in conjunction with the Proximitor sensor. Cross-talk suppression is maintained via the integrated coaxial shield, which should be properly routed away from high-current conductors to minimize inductive interference.

Ordering info

• 1 x 330730-080-00-00 Extension Cable assembly

• 1 x ClickLoc connector kit

• 1 x Protective connector cap

• 1 x Installation documentation

Field Installation Guidelines

• Handling: Do not exceed the minimum bend radius of 25 mm to prevent impedance changes.

• Connection: Ensure ClickLoc connectors are clean and fully seated by hand; do not use pliers or tools to tighten.

• Routing: Use shielded conduits where possible to reduce exposure to electromagnetic interference (EMI).

• Grounding: Terminate the cable shield at the monitoring system ground point to prevent ground loops that could introduce electrical noise.

Frequently Asked Questions

• Q: Can I splice this cable if it is too long?

  A: No. Splicing creates impedance discontinuities that distort the signal, resulting in errors in vibration measurement and phase data.

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

  A: This impedance is required to match the output of the probe and the input of the Proximitor sensor, ensuring maximum power transfer and signal clarity.

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

  A: No. This cable is specifically engineered for 3300 XL components and is not electrically or mechanically compatible with legacy systems.

• Q: How do I verify the cable is working properly?

  A: Use a high-impedance multimeter to check continuity of the center conductor and ensure the shield is not shorted to the signal wire.

• Q: Does the connector need to be lubricated?

  A: No. Lubricants can attract debris and degrade electrical contact; ensure the connector is clean and dry before mating.

• Q: Can I install this in a high-vibration area?

  A: Yes, but the cable must be secured with clamps to prevent fatigue at the connector junction.

• Q: What is the effect of the -10 VDC gap voltage target?

  A: Maintaining this gap voltage ensures the Proximitor operates in its linear range, which is mandatory for accurate displacement detection.

• Q: How does ambient temperature affect performance?

  A: The materials are rated for -51 deg C to +177 deg C, but avoid excessive mechanical stress on the cable jacket at the lower temperature limit.