Configured for high-frequency displacement measurement in rotating machinery monitoring networks, the BENTLY NEVADA 330850-90-05 (330850 3300 XL 25 mm Proximitor Sensor) provides direct physical signal processing between the non-contacting probe and the vibration monitoring instrumentation.
| Parameter | Specification |
|---|---|
| Model | 330850-90-05 |
| Brand | Bently Nevada |
| Origin | USA |
| Weight | 0.255 kg |
| Dimensions | 60 mm x 60 mm x 100 mm |
| Operating Temp | -35 deg C to +85 deg C |
| Power Consumption | 12 mA maximum |
The 330850-90-05 utilizes eddy-current probe scaling to convert the gap between the probe tip and the observed shaft into a proportional electrical signal. During commissioning, operators must perform gap voltage validation to ensure the steady-state reading is centered at -10 VDC, optimizing the linear range for dynamic observation of rotor dynamics. To maintain measurement precision, particularly in multi-probe arrays, cross-talk suppression must be implemented by strictly adhering to installation spacing guidelines to prevent inductive interference between adjacent sensors.
Q: How should the probe gap be verified during initial installation?
A: Using a high-impedance digital multimeter, measure the voltage at the Proximitor signal output terminals while the machine is at rest. Adjust the probe depth until the voltage reaches the -10 VDC target, confirming the sensor is at the center of its linear range.
Q: Is it permissible to field-trim the 9.0 meter coaxial cable?
A: No. The 3300 XL system is factory-calibrated as a complete assembly (probe, extension cable, and Proximitor). Altering the system length will invalidate the calibration and introduce significant measurement errors.
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