Description

Configured for physical transmission of high-frequency eddy-current signals within a 3500 or 3300 Machinery Protection System, the Bently Nevada 330130-00-07-10-02-00 (330130 Standard Extension Cable) provides direct electrical execution. It links the 3300 XL 8 mm proximity probe to the 3300 XL proximity transducer, maintaining loop impedance matching across the specific system length.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics

The coaxial architecture explicitly dictates the calibration stability required for precise rotor dynamics tracking. Because the 3300 XL Proximitor sensor relies on a constant 75.0 ohm rf transmission line to calculate dynamic distance, any impedance mismatch introduces signal reflections. These reflections distort the gap voltage validation, throwing off the critical -10 VDC target midpoint. Furthermore, this cable version integrates specific shielding that acts as cross-talk suppression, preventing inductive interference from adjacent phase trigger or vibration sensor runs within the same conduit tray.

Frequently Asked Questions

Q: Can this 7.0-metre extension cable be deployed with a 5-metre total system Proximitor sensor?

A: No, deploying this 7.0-metre cable with a 5-metre Proximitor creates a major calibration error. The sensor expects the total physical length of the probe plus the extension cable to equal exactly 10.0 metres to hit the correct scale factor.

Q: What is the mechanical function of the fluid locator silicone boot option on this cable?

A: The silicone boot option seals the connection point against oil, moisture, and chemical contaminants common in turbine environments. It physically prevents liquid ingress into the coaxial junction, which would alter the loop capacitance and invalidate calibration.

Field Installation Guidelines

• Connector Engagement: Hand-tighten the click-loc connectors until they click audibly. Do not use pliers or mechanical wrenches, as excessive torque deforms the internal gold-plated coaxial pins.
• Conduit Grounding: Run the cable inside dedicated, isolated metal conduits. Ground the conduit network at one single point on the machine rack to prevent parasitic ground loops from introducing noise into the 4-20 mA or raw voltage buffered outputs.
• Minimum Bend Radius: Maintain a physical bend radius of no less than 25.4 mm (1.0 inch) during routing. Sharp bends tear the outer Teflon jacket and crush the internal dielectric layer, causing immediate signal attenuation.