Configured for signal transmission in machine monitoring networks, the Bently Nevada 330930-040-04-00 (330930-040-04-00 Extension Cable) provides direct physical and electrical linking between the eddy-current probe and the Proximitor sensor.

Suffix Breakdown And Model Matrix

• Base Model: 330930 - 3300 NSv Extension Cable
• Cable Length Option: 040 - 4.0 meters (13.1 feet) total length
• Connector and Cable Option: 04 - With stainless steel armor, FEP jacket, and connector protector
• Agency Approval Option: Not Required

Hardware Specifications

Rotor Dynamics And Eddy-Current Proximity Transducer Performance

The 3300 XL NSv Transducer System maintains an average scale factor of 7.87 V/mm (200 mV/mil) across its linear measurement range. The system utilizes high-frequency radio frequency signals generated by the Proximitor sensor, transmitted through this 4-meter extension cable, to measure the static and dynamic distance between the probe tip and the observed conductive target surface. Gap voltage validation must be maintained within the standard linear operating window, typically targeting -9 V to -11 V DC when the shaft is centered in the probe linear range. The inclusion of the 4-meter extension cable requires system length matching to guarantee that the combined electrical length of the probe and extension cable matches the calibrated Proximitor sensor configuration requirement of either 5 meters or 7 meters total system length.

Ordering Information

• 1 x 330930-040-04-00 3300 NSv Extension Cable (4.0 meters length, with stainless steel armor, FEP jacket, and connector protectors)

Field Installation Guidelines

• System Length Matching: Ensure the cumulative electrical length of the probe and extension cable matches the specific calibration configuration of the paired Proximitor sensor.
• Connector Protection: Install the included connector protectors over all interconnections to prevent moisture ingress, particulate contamination, and mechanical strain on the gold-plated pins.
• Routing and Separation: Route the armored cable away from high-voltage power conduits, variable frequency drive cables, and high-temperature steam lines to eliminate electromagnetic interference and thermal degradation.
• Wiring Limits: Maintain the maximum distance between the Proximitor sensor and the monitoring system within the specified limit of 305 meters (1,000 feet) utilizing approved multi-conductor shielded cable.

Frequently Asked Questions

• What is the primary function of the 330930-040-04-00 extension cable?

  The cable acts as an electrical transmission line between the eddy-current proximity probe and the Proximitor sensor in machinery monitoring applications.

• Can this extension cable be spliced or cut to length in the field?

  No. Altering the physical length of the cable changes its distributed capacitance and impedance, invalidating system calibration and scale factor accuracy.

• What material is used for the outer protective jacket?

  The cable utilizes a Fluorinated Ethylene Propylene (FEP) jacket combined with flexible stainless steel armor for chemical and mechanical protection.

• Does the cable require external power supply input?

  No. As a passive cabling component, it requires no external power source and relies entirely on the signal loop driven by the Proximitor sensor.

• What is the nominal output resistance of this cable assembly?

  The nominal output resistance specification for this extension cable assembly is 50 ?.

• How does the system handle signal transmission over long distances?

  The high-frequency carrier signal from specialized sensors passes through the matched-impedance cable to preserve signal integrity for vibration and position measurement.

• What is the specified capacitance per unit length for this cable?

  The extension cable capacitance is characterized at a typical value of 69.9 pF/m (21.3 pF/ft).

• What target size restrictions apply to the NSv transducer system?

  The NSv system is engineered for small target measurements, supporting radial vibration on shafts under 51 mm or axial targets under 15 mm.