The Bently Nevada 330730-040-01-00, also cataloged as the 330730 Extension Cable, operates as a dedicated hardware component for signal transmission between eddy-current proximity probes and Proximitor sensors within vibration monitoring platforms.

Model Matrix and Suffix Breakdown

The 330730-040-01-00 identifier is defined by the following specifications:

• 040: 4.0 meters (13.1 feet) cable length.

• 01: Armored cable construction for physical protection.

• 00: No special agency approvals required.

Hardware Specifications

Rotor Dynamics and Signal Integrity

Proper eddy-current probe scaling is required when integrating this extension cable into a 3300 XL system, as the total system length (probe + extension cable) determines the calibration profile. The system is designed to maintain a -10 VDC gap voltage target at the Proximitor sensor output during nominal operation. Cross-talk suppression is achieved through controlled-impedance design and standardized shielding, which is maintained throughout the length of the armored cable to prevent noise injection into the rotor dynamics signal path.

Ordering Information

• 1 x 330730-040-01-00 11 mm Extension Cable (4.0 m armored).

• 1 x Connector protector kit (integrated).

Cable Installation and Routing Guidelines

• Physical Handling

• Do not exceed the minimum bend radius of the armored cable during installation to avoid damaging the internal coaxial structure.

• Use cable ties to secure the extension cable to structural members, preventing vibration-induced wear.

• Electrical Shielding

• Ensure the connector mating surfaces are clean and free of contaminants to prevent signal attenuation.

• Ground the shield at the Proximitor sensor end only to avoid creating ground loops that interfere with low-level displacement signals.

Frequently Asked Questions

• Does the cable length affect system calibration?

  Yes, the 3300 XL system is calibrated for a specific total length. Changing the extension cable length requires recalibration of the Proximitor sensor.

• What is the purpose of the armor on the 01 option?

  The armor provides physical protection against mechanical abrasion, cutting, or crushing in harsh industrial environments.

• Is this cable compatible with 8 mm probes?

  No, the 3300 XL 11 mm extension cable is specifically engineered for impedance matching with 11 mm probes and corresponding Proximitor sensors.

• How do I verify signal continuity?

  Continuity is verified by measuring the resistance between the center conductor and the outer shield using a multimeter at the connector ends.

• Can I splice this cable if it is too short?

  Splicing is not recommended as it alters the impedance and capacitance, leading to inaccurate displacement readings and potential system failure.

• What is the typical capacitance of this cable?

  The cable has a typical capacitance of 69.9 pF/m, which is accounted for in the 3300 XL system's total frequency response calculation.

• How should connectors be protected?

  Use the provided connector protectors to prevent moisture and debris from entering the connection point, which could cause signal drift.

• What is the resistance of the center conductor?

  The cable is designed with a standard output resistance of 50 Ohm to match the requirements of the Bently Nevada 3300 XL monitoring system.