The Bently Nevada 330130-085-02-05, also cataloged as the 330130 Extension Cable, operates as a dedicated hardware component for high-frequency signal transmission within 3300 XL Proximity Transducer Systems. It routes dynamic analog displacement signals between proximity probes and Proximitor sensors without signal loss or amplitude distortion across continuous machinery protection channels.
| Option Code | Designation | Parameter Value / Option Description |
|---|---|---|
| 330130 | Base Model | 3300 XL Standard Extension Cable |
| -085 | Cable Length Option | 8.5 meters (27.9 feet) |
| -02 | Connector Protector and Cable Option | Standard cable with connector protectors |
| -05 | Agency Approval Option | Multiple Approvals |
| Parameter | Specification |
|---|---|
| Model | 330130-085-02-05 |
| Base Model | 330130 |
| Brand | Bently Nevada |
| Series | 3300 XL |
| Product Type | Extension Cables |
| Origin | USA |
| Cable Length | 8.5 meters (27.9 feet) |
| Cable & Connector Configuration | Standard coaxial cable with integrated connector protectors |
| Agency Approval Option | Multiple Approvals (-05 option) |
| Operating Temp | -51 to +177 deg C (Standard 3300 XL cable environment rating) |
| Power Consumption | Passive physical component (0 W) |
| Dimensions | Standard 8.5 m cable length assembly |
| Weight | 2 kg (Shipping Weight) |
| System Impedance | 75 ohm coaxial matched construction |
The 330130-085-02-05 extension cable maintains precise electrical length and 75 ohm coaxial impedance to preserve original eddy-current probe scaling across the transducer circuit. Length deviations or improper capacitance degrade the high-frequency excitation field emitted by the paired 3300 XL Proximitor sensor, shifting the standard 7.87 V/mm (200 mV/mil) output scale factor. Proper connection continuity enables exact gap voltage validation targeting -10 VDC at nominal shaft center position, suppressing cross-talk and delivering undistorted dynamic signal paths for continuous tracking of rotor dynamics.
Q: Why must total electrical length be verified when using the 330130-085-02-05 extension cable?
A: Bently Nevada 3300 XL Proximitor sensors are calibrated for total system lengths (typically 5.0, 9.0, or custom total meters). An 8.5-meter extension cable must pair with a specific probe lead length (such as a 0.5-meter probe lead) to equal the exact system length specified on the Proximitor label; mismatched total lengths cause scale factor errors.
Q: What protection is provided by the -02 connector option?
A: Option -02 supplies elastomeric connector protectors over the miniature coaxial joining ends. These protectors prevent moisture, oil, and conductive debris from contaminating the coaxial connection while isolating the metallic outer shell from ground contact.
Q: How does proper cable shielding prevent ground loop currents in TSI monitoring racks?
A: Coaxial shielding must remain isolated from intermediate junction boxes or ground conduits along the field run. Establishing a single ground reference at the Proximitor sensor chassis prevents circulating ground loops from interfering with low-amplitude vibration signals.
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