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Configured for RF signal transmission in 3300 XL 8mm Proximity Transducer Systems, the Bently Nevada 330130-085-02-CN (330130 Extension Cable) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

The part number 330130-085-02-CN designates specific physical characteristics and agency certifications based on the Bently Nevada ordering matrix:

  • 330130: Base designator for 3300 XL Standard Extension Cable.
  • 085: Cable length option specifying 8.5 meters (27.9 feet).
  • 02: Connector option specifying a standard coaxial cable equipped with integrated connector protectors.
  • CN: Agency approval option specifying certification compliance for ATEX, IECEx, and Chinese NEPSI hazardous area installations.

Hardware Specifications

Parameter Specification
Model 330130-085-02-CN
Brand Bently Nevada
Origin USA
Cable Type Coaxial, 75 ohm nominal impedance
Cable Length 8.5 meters (27.9 feet)
Armor Option Unarmored (Standard sheath)
Connector Protectors Yes, pre-installed on terminal ends
Operating Temp -51 to +177 deg C (-60 to +350 deg F)
Electrical Capacitance 69.9 pF/meter (21.3 pF/foot) typical
Safety Approvals ATEX, IECEx, NEPSI Ex ia IIC T4...T1 Ga
Weight 0.29 kg (0.64 lbs)
Dimensions 8.5 meters length, 3.7 mm nominal outer diameter
Power Consumption Passive device (0 W)

Eddy-Current Probe Impedance Scaling & Gap Voltage Validation

To achieve linear eddy-current probe scaling of 7.87 V/mm (200 mV/mil), the 330130-085-02-CN extension cable is manufactured with tight tolerances for characteristic impedance and capacitance. System calibration mandates that the total electrical length of the probe and extension cable equals exactly 9.0 meters. The Proximitor sensor converts physical proximity fluctuations into voltage outputs based on this matched circuit. Proper system integration preserves electrical parameters to guarantee accurate gap voltage validation, targeting a nominal -10 VDC baseline in the center of the linear calibration range. This signal integrity minimizes phase offset during high-speed rotor dynamics monitoring.

Frequently Asked Questions

Q: How does the CN suffix affect physical installation in hazardous locations?

A: The CN option indicates certified compliance with ATEX, IECEx, and Chinese NEPSI intrinsically safe standards. In these environments, the cable must be wired through certified intrinsic safety barriers or galvanic isolators matching the system electrical entity parameters.

Q: Can this 8.5-meter standard cable be modified or spliced in the field?

A: No. Splicing or cutting the coaxial cable changes the system capacitance and impedance. This permanently alters the calibration parameters of the 3300 XL Proximitor sensor, causing inaccurate vibration and position feedback.

Field Installation Guidelines

  • Minimum Bend Radius: Maintain a minimum bend radius of 25.4 mm (1.0 inch) for standard coax installation.
  • Connector Torque: Hand-tighten coaxial connectors, then turn an additional 1/4 turn using insulated connector wrenches to prevent core degradation.
  • Shield Grounding: The coaxial shield must be grounded at only one point (typically at the Proximitor sensor terminal strip) to prevent ground loops.

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