The Bently Nevada 330103-20-25-05-02-CN serves as the primary 330103 Proximity Probe utilized to execute proximity and vibration sensing across 3300 XL machinery monitoring platforms. The hardware translates mechanical shaft displacement into proportional electrical voltage deviations via high-frequency eddy-current sensing loop paths.
| Suffix Code | Option Description | Technical Parameter |
|---|---|---|
| 330103 | Base Model | 3300 XL 8 mm Proximity Probe |
| -20 | Unthreaded Length Option | 200 mm |
| -25 | Overall Case Length Option | 250 mm |
| -05 | Total Length Option | 0.5 meter (1.6 feet) |
| -02 | Connector and Cable Type Option | Miniature coaxial ClickLoc connector, standard cable |
| -CN | Agency Approval Option | Country-specific regional approvals |
| Parameter | Specification |
|---|---|
| Model | 330103-20-25-05-02-CN |
| Brand | Bently Nevada |
| Origin | USA |
| Weight | 1.5 kg (Shipping Weight) |
| Dimensions | 8 mm probe tip diameter, 250 mm overall case length |
| Operating Temp | -51 deg C to +177 deg C nominal limits |
| Power Consumption | Passive hardware loop powered by external Proximitor Sensor |
| Cable Impedance | 75 Ohm triaxial |
| Cable Insulation | Fluoroethylene propylene (FEP) |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 303 or 304 stainless steel (SST) |
Physical deployment of this 8 mm eddy-current probe requires precise gap voltage validation during mechanical alignment to set the physical sensor within its linear performance range. System calibration mandates adjusting the insertion depth until the output measures a -10 VDC target voltage at the static midpoint. Securing this electrical baseline ensures the internal eddy-current probe scaling accurately tracks high-speed rotor dynamics and structural translations without introducing signal clipping or waveform saturation during machine transient events.
Q: What structural failure occurs if the 0.5-meter probe cable is cut and extended in the field?
A: Splicing or changing the physical cable length modifies the calibrated loop capacitance and inductance. This disrupts the exact eddy-current tuning calibration, causing measuring errors and disabling the standard -10 VDC baseline tracking.
Q: Does replacing the proximity probe demand a matched re-calibration of the Proximitor Sensor?
A: No. The 3300 XL 8 mm series probes are engineered with standardized electrical parameters, permitting direct component hot-swapping without manual loop re-matching or system re-calibration.
Thread the probe case directly into the specialized mounting port, verifying the 8 mm tip maintains adequate clearance from surrounding conductive surfaces to avoid side-viewing interference. Monitor the electrical path with a digital voltmeter, turning the hardware until the gap voltage stabilizes exactly at the -10 VDC benchmark. Torque the locknut to standard engineering tolerances to prevent physical drift under high thermal expansion cycles. Keep the miniature coaxial ClickLoc connection junction clean and isolate it within a dry, weather-tight conduit housing.
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