Overview
Suffix Breakdown & Model Matrix
The provided documentation identifies a single fixed ordering model, 330850-51-CN. No official suffix allocation or ordering matrix is included in the supplied data; therefore, no suffix interpretation is provided.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330850-51-CN |
| Brand | Bently Nevada |
| Product Type | 3300 XL 25 mm Proximitor Sensor |
| Origin | USA |
| Shipping Location | Xiamen, China |
| Weight | 0.22 kg |
| Dimensions | 8.8 x 6 x 6.5 cm |
| Operating Temp | -35 degC to +85 degC |
| Storage Temp | -51 degC to +100 degC |
| Power Consumption | Powered from -18 VDC to -24 VDC supply |
| Measurement Range | 1.0 to 3.0 mm |
| Sensitivity | 7.87 V/mm (200 mV/mil) +/-5% |
| Output Signal | -2 VDC to -18 VDC |
| Frequency Response | 0 to 10 kHz (+/-1 dB) |
| Linearity | +/-1% of full scale |
| Tariff Code | 8537101190 |
| Country of Shipment | China |
Gap Voltage Validation and Eddy-Current Signal Scaling
The 3300 XL Proximitor Sensor performs signal conditioning for an eddy-current proximity measurement chain. Correct system operation depends on probe, extension cable, and Proximitor Sensor being installed as a matched system configuration.
Gap voltage validation is typically performed during commissioning to confirm that the probe operates within the expected negative DC bias region before dynamic vibration measurements are accepted. Verification of probe gap voltage helps confirm correct target spacing and establishes the reference operating position for displacement monitoring. Proper cable routing, shield continuity, and separation from high-energy conductors reduce electrical cross-talk and preserve calibrated sensor scaling throughout the specified frequency range.
Frequently Asked Questions
Q: Can the Proximitor Sensor be replaced independently of the probe?
A: Replacement should maintain the manufacturer-approved matched probe system configuration. Mixing incompatible probes, extension cables, or signal conditioners can affect calibration and measurement accuracy.
Q: Does the module support hot replacement while energized?
A: The supplied documentation does not specify hot-swap capability. Replacement should follow the equipment manufacturer’s maintenance procedure and plant lockout requirements.
Q: Why is shield grounding important for proximity sensor wiring?
A: Proper shield termination minimizes electromagnetic interference and reduces measurement errors introduced by ground loops or induced noise in low-level eddy-current signals.
Field Installation Guidelines
- Install the Proximitor Sensor within the specified operating temperature range.
- Route probe cables separately from motor power, inverter output, and high-current conductors.
- Maintain continuous cable shielding according to the system grounding practice specified by the equipment manufacturer.
- Verify probe gap voltage during commissioning before enabling machine protection functions.
- Avoid bending, crushing, or sharply twisting extension cables to preserve calibration characteristics.
- Confirm power supply polarity and voltage remain within the specified -18 VDC to -24 VDC operating range before energizing the sensor.
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