Configured for high-frequency displacement measurement in rotating machinery monitoring networks, the BENTLY NEVADA 330878-50-00 (330878 3300 XL 50 mm Proximitor Sensor) provides direct physical signal processing between the non-contacting inductive probe and the vibration monitoring instrumentation.
| Suffix | Description |
|---|---|
| 50 | 5.0 meters system length, panel mount configuration |
| 00 | No hazardous area agency approvals |
| Parameter | Specification |
|---|---|
| Model | 330878-50-00 |
| Brand | Bently Nevada |
| Origin | USA |
| Weight | 0.255 kg (approx.) |
| Dimensions | 60 mm x 60 mm x 100 mm |
| Operating Temp | -35 deg C to +85 deg C |
| Power Consumption | 12 mA maximum |
The 330878-50-00 utilizes eddy-current probe scaling to convert the gap between the probe tip and the metallic target into a proportional electrical signal. Precise gap voltage validation—targeting -10 VDC at the nominal operating position—is mandatory during installation to ensure the sensor remains centered within its linear measurement range. This bias is fundamental for accurate rotor dynamics analysis. Furthermore, in high-density installations, engineers must implement cross-talk suppression by maintaining specified physical distances between adjacent probe tips to eliminate mutual frequency interference in the oscillator circuit.
Q: Can the 50 mm probe system be used with standard 8 mm or 25 mm extension cables?
A: No. The 3300 XL 50 mm system is factory-calibrated as a matched set. Interchanging components between different probe series will result in non-linear scaling and erroneous displacement output.
Q: How is the Proximitor protected against transient surges in the field?
A: The device requires a stable DC power supply (-17.5 VDC to -26 VDC). While the Proximitor itself is robust, surge protection should be implemented at the monitor or cabinet level to safeguard the signal loop from industrial transients.
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