Configured for high-frequency signal transmission in 3300 XL monitoring systems, the Bently Nevada 330730-080-02-00 (330730-080-02-00 Extension Cable) provides direct physical electrical continuity between the proximity probe and the Proximitor sensor.

Suffix Component Matrix

The 330730-080-02-00 part number indicates the following hardware configuration:

• 330730: 3300 XL Extension Cable assembly.

• 080: 8.0 meters total system length requirement.

• 02: Connector assembly option with protective components.

• 00: No agency approval options.

Hardware Specifications

Rotor Dynamics and Signal Conditioning

The 3300 XL system performance is predicated on maintaining a precise 75 Ohm impedance path across the entire transducer loop. Achieving accurate rotor dynamics data requires consistent eddy-current probe scaling; therefore, the total cable length must match the Proximitor calibration settings. Gap voltage validation (-10 VDC targets) is performed at the Proximitor terminal to ensure the system is operating within its linear sensing range. Additionally, cross-talk suppression is maintained by utilizing high-quality coaxial shielding which must remain continuous, ensuring that high-frequency carrier signals are protected from induced electromagnetic interference in the industrial environment.

Ordering info

• 1 x 330730-080-02-00 Extension Cable assembly

• 1 x ClickLoc connector interface kit

• 1 x Protective connector cap

• 1 x Installation manual

Field Installation Guidelines

• Cable Routing: Maintain a minimum static bend radius of 25 mm. Exceeding this limit will alter the characteristic impedance of the coaxial cable.

• Connector Mating: Hand-tighten all ClickLoc connections. Do not use external tools to prevent damage to the internal seals and contact pins.

• Grounding: Ensure the cable shield is terminated at the monitoring system's common ground point to eliminate potential ground loops.

• Support: Use cable ties or clamps to secure the assembly, ensuring no mechanical tension is applied to the connector junctions during machine operation.

Frequently Asked Questions

• Q: Can this cable be shortened to fit a specific installation?

  A: No. The cable is calibrated for a specific system length; cutting or splicing will create impedance discontinuities and result in measurement errors.

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

  A: No. It is engineered specifically for the 3300 XL platform and is not electrically or mechanically compatible with older 3300 series proximity equipment.

• Q: What is the benefit of the protective connector option?

  A: This option includes enhanced housing protection, offering better resistance to contaminants and incidental mechanical stress at the connection point.

• Q: How does ambient temperature affect cable performance?

  A: The cable is designed for operation between -51 deg C and +177 deg C. Do not manipulate the cable at the low end of this range to avoid insulation cracking.

• Q: Does the shield provide electrical return?

  A: No. The coaxial shield is intended for electromagnetic isolation. The return path is the outer braid, which must be connected correctly to the Proximitor.

• Q: Can I use this with non-Bently Nevada Proximitors?

  A: No. The system is designed as a matched set; performance cannot be guaranteed when using hardware from different manufacturers.

• Q: How do I identify if the extension cable is failing?

  A: A failed cable often results in a loss of gap voltage or erratic vibration readings. Verify continuity and inspect the connectors for corrosion or debris.

• Q: What is the impact of moisture in the connector?

  A: Moisture ingress will create signal leakage and erratic data. Ensure connectors are sealed with the provided protective caps when not mated.