Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 330880-28-40-058-01-02 |
| Brand | Bently Nevada |
| Product Type | PROXPAC XL Proximity Transducer Assembly |
| Series | 3300 XL Series |
| Origin | USA |
| Weight | Approximately 1.44 kg |
| Dimensions | Not specified |
| Operating Temp | Industrial rotating machinery environment |
| Power Consumption | Maximum 12 mA |
| Probe Type | 3300 XL 8 mm Eddy Current Proximity Probe |
| Measurement Principle | Eddy Current non-contact displacement measurement |
| Configuration | Integrated proximity probe and Proximitor sensor assembly |
| Mounting Thread | 3/4-14 NPT |
| Standoff Adapter | 40 (4.0 inch B Dimension) |
| Probe Penetration Length | 058 (5.8 inch / approximately 147 mm) |
| Housing Material | Polyphenylene Sulfide (PPS) |
| Protection Rating | Type 4X / IP66 |
| Output Signal | Voltage proportional to measured gap/displacement |
| Operating Voltage | -17.5 VDC to -26 VDC |
| Frequency Response | 0 to 10 kHz (-3 dB at 305 m / 1000 ft cable length) |
| Measurement Accuracy | Best Fit Linearity deviation less than ±0.025 mm (±1 mil) at 0 deg C to +45 deg C |
| Minimum Target Size | 15.2 mm diameter |
| Minimum Shaft Diameter | 50.8 mm diameter |
Eddy-Current Probe Scaling and Rotor Dynamics Measurement
The 330880-28-40-058-01-02 uses the Bently Nevada 3300 XL 8 mm eddy-current sensing technology to convert shaft-to-probe gap variation into an electrical output signal. The integrated Proximitor electronics performs probe signal conditioning and gap voltage conversion for machinery vibration and shaft position monitoring.
The eddy-current measurement circuit requires correct probe scaling, target material compatibility, and gap voltage validation. Bently Nevada proximity systems commonly use a nominal -10 VDC gap voltage reference point during calibration checks to verify probe operating position and linear measurement range.
The assembly supports rotor dynamics analysis by providing dynamic vibration signals and static position information required for monitoring radial vibration, axial displacement, and phase reference parameters.
Frequently Asked Questions (FAQ)
Q: Does the 330880-28-40-058-01-02 require a separate extension cable between the probe and Proximitor sensor?
A: No. The PROXPAC XL design integrates the probe and Proximitor electronics into a single assembly, eliminating a separate external probe housing and extension cable connection.
Q: What type of measurement signal is generated by this assembly?
A: The assembly provides a voltage output proportional to the measured probe gap, representing shaft displacement and vibration movement.
Q: What installation factors affect eddy-current measurement accuracy?
A: Correct probe gap adjustment, target surface condition, shaft material compatibility, cable routing, and electrical grounding practices affect measurement performance.
Field Installation Guidelines
- Install the assembly using the specified 3/4-14 NPT mounting connection and ensure mechanical engagement is maintained during operation.
- Maintain correct probe-to-shaft clearance according to the system calibration requirements.
- Route signal wiring separately from high-current power cables and switching circuits to reduce electrical interference.
- Connect cable shields according to the machinery monitoring system grounding practice.
- Verify probe polarity, power supply voltage, and output signal before commissioning.
- Confirm the target shaft material and surface condition match the eddy-current probe calibration requirements.
- Perform gap voltage verification after mechanical installation to confirm the probe operates within the intended measurement range.
Reviews
There are no reviews yet.