The Bently Nevada 330104-00-20-05-02-00, also cataloged as the 330104 Proximity Probe, operates as a dedicated hardware component for non-contacting vibration and displacement measurements within the 3300 XL Proximity Transducer System.
| Parameter | Specification |
|---|---|
| Model | 330104-00-20-05-02-00 |
| Brand | Bently Nevada |
| Origin | U.S.A. |
| Weight | 0.323 kg |
| Shipping Weight | 1.5 kg |
| Unthreaded Length | 0 mm |
| Overall Case Length | 200 mm |
| Total Length | 5.0 meters (16.4 feet) |
| Connector / Cable Type | Miniature coaxial ClickLoc connector, standard cable |
| Agency Approval | Not required |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 303 or 304 stainless steel (SST) |
| Operating Temp | -51 deg C to +177 deg C (-60 deg F to +351 deg F) |
The 3300 XL 8 mm proximity probe relies on eddy-current technology to determine the physical dynamic or static distance between the probe tip and a conductive target surface. Accurate system scaling requires correct calibration to a specific target material (typically AISI 4140 steel) to achieve a nominal scale factor of 7.87 V/mm (200 mV/mil). During physical loop commissioning, engineers must perform gap voltage validation to ensure the probe operates within its linear range. The target DC gap voltage is typically adjusted to -10 VDC, corresponding to the midpoint of the linear displacement envelope. Proper calibration mitigates signal cross-talk suppression issues when multiple probe cases are installed in close proximity within a machine housing, ensuring that overlapping electromagnetic fields do not introduce errors into the rotor dynamics data stream.
Q: What is the significance of the -10 VDC target during physical installation?
A: The -10 VDC value represents the electrical midpoint of the linear range for the 3300 XL 8 mm transducer system. Setting the probe gap to this voltage ensures equal dynamic range for both positive and negative target displacements without clipping the output signal.
Q: Can the ClickLoc connector be disassembled or modified in the field?
A: No, the ClickLoc connector is factory-terminated to maintain precise physical impedance and environmental sealing. Modifying the connector assembly in the field alters the electrical length and total capacitance of the coaxial line, which corrupts the scale factor and system calibration.
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