Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330171-00-94-10-02-00 |
| Base Model | 330171 |
| Brand | Bently Nevada |
| Series | 3300 Series |
| Product Type | 5 mm Proximity Probe |
| Dimensions | Overall case length: 9.4 in |
| Thread Size | 1/4-28 UNF |
| Unthreaded Length | 0 in |
| Cable Length | 1.0 m (3.3 ft) |
| Connector | Miniature coaxial ClickLoc connector |
| Cable Type | Standard cable |
| Armor | Without armor |
| Linear Range | 2 mm (80 mils) |
| Measurement Range | Typically 0.25 mm to 2.3 mm (10 to 90 mils) |
| Incremental Scale Factor | 7.87 mV/um (200 mV/mil) nominal |
| Probe Tip Operating Temperature | -35 deg C to +177 deg C (-31 deg F to +350 deg F) |
| Agency Approval | None |
| Power Consumption | Not specified in provided data |
| Measurement Principle | Eddy-current proximity measurement |
| Primary Measurements | Radial vibration, axial position, speed, zero speed, and Keyphasor reference |
Eddy-Current Scaling and Gap Voltage
The 3300 5 mm probe converts changes in conductive target distance into an electrical output signal. Therefore, installation gap directly affects the operating point and measurement accuracy.
For Bently Nevada proximity systems, technicians should validate the probe gap voltage against the associated Proximitor sensor requirements before commissioning. A nominal -10 VDC gap target is commonly used as a field reference for Bently Nevada eddy-current systems, but the applicable system documentation should govern the final setting.
The 7.87 mV/um nominal incremental scale factor defines the displacement-to-voltage relationship. Consequently, correct probe positioning and compatible target material remain necessary for the specified linear response.
Frequently Asked Questions
Q: What type of target does the 330171-00-94-10-02-00 measure?
A: The probe measures displacement to a conductive target using an eddy-current sensing principle. It does not require physical contact with the shaft.
Q: What is the specified operating temperature at the probe tip?
A: The stated probe tip operating range is -35 deg C to +177 deg C. This corresponds to -31 deg F to +350 deg F.
Q: What connector does this configuration use?
A: The -02 configuration uses a miniature coaxial ClickLoc connector with standard cable. The specified cable length is 1.0 m.
Field Installation Guidelines
- Verify that the mounting thread matches the specified 1/4-28 UNF interface before installation.
- Maintain the probe axis perpendicular to the intended measurement surface where the mechanical arrangement requires it.
- Confirm the physical target area provides sufficient conductive surface for the 5 mm probe.
- Route the probe cable separately from high-current switching conductors and strong electromagnetic noise sources.
- Avoid excessive cable bending, mechanical tension, and abrasion at the connector and probe body.
- Inspect the ClickLoc connector for correct engagement before energizing the measurement circuit.
- Validate the installed gap voltage using the associated Bently Nevada Proximitor system before machinery operation.
- Check the electrical polarity, signal continuity, and shielding arrangement against the applicable system wiring documentation.
- After installation, verify the vibration or position signal at a known machine operating condition before enabling protection logic.
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