Overview
The Bently Nevada 330709-000-080-10-02-00, also cataloged as the 330709 3300 XL 11 mm Proximity Probe, operates as a dedicated hardware component for eddy-current displacement measurement and rotor position monitoring within Bently Nevada TSI monitoring systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330709-000-080-10-02-00 |
| Brand | Bently Nevada |
| Origin | USA |
| Product Type | 3300 XL 11 mm Proximity Probe |
| Dimensions | Overall case length: 8.0 in (203.2 mm) |
| Operating Temp | -52 deg C to +177 deg C |
| Power Consumption | Supplied by compatible Bently Nevada proximity transducer system |
| Probe Tip Diameter | 11 mm |
| Linear Range | 4.0 mm (160 mils) |
| Incremental Scale Factor (ISF) | 3.94 V/mm (100 mV/mil) nominal |
| Frequency Response | 0 to 8 kHz (+0, -3 dB) |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 304 stainless steel |
| Thread Size | 5/8-18 UNF |
| Connector Type | Miniature coaxial ClickLoc connector |
| Total Cable Length | 1.0 m |
| Minimum Target Size | 30.5 mm diameter flat target |
| Recommended Minimum Shaft Diameter | 152 mm |
Eddy-Current Measurement and Rotor Dynamics Characteristics
The 3300 XL 11 mm proximity probe uses eddy-current sensing technology to convert shaft displacement into electrical signals. The probe maintains a nominal 3.94 V/mm scaling factor, allowing the connected monitoring system to process radial vibration and axial position data.
Additionally, the probe requires correct gap voltage validation during commissioning. Technicians typically verify the operating gap condition against the Bently Nevada proximity system target value, including the commonly applied -10 VDC gap voltage reference for proper signal calibration.
The probe construction supports rotor dynamics analysis by providing displacement feedback from rotating shafts. Therefore, engineers can evaluate vibration amplitude, shaft position changes, and mechanical movement trends through compatible TSI monitoring modules.
Frequently Asked Questions
Q: What type of signal does the 330709-000-080-10-02-00 provide?
A: The probe provides an eddy-current displacement signal proportional to the distance between the probe tip and the conductive shaft target. A compatible Bently Nevada proximitor converts this signal into a monitoring output.
Q: Can the probe operate without a proximitor module?
A: No. The 330709-000-080-10-02-00 requires a compatible Bently Nevada proximity transducer interface to supply excitation and process the eddy-current measurement signal.
Q: What installation factors affect measurement accuracy?
A: Correct probe gap setting, target surface condition, cable routing, and shielding practices directly affect measurement stability and signal quality.
Field Installation Guidelines
- Install the probe with the specified 5/8-18 UNF mounting thread and maintain mechanical alignment with the shaft target surface.
- Verify the probe tip faces a clean conductive target area without excessive surface damage or contamination.
- Route the coaxial cable away from high-current power conductors to reduce electrical interference.
- Connect cable shielding according to the monitoring system grounding practice.
- Confirm the probe gap voltage during commissioning before placing the monitoring channel into service.
- Avoid sharp cable bends and mechanical stress near the ClickLoc connector interface.
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