Overview
Configured for eddy-current proximity measurement in the Bently Nevada 3300 System, the Bently Nevada 109549-01 (109549-01 3300 XL NSv Photoelectric Probe) provides direct physical sensing of shaft position relative to the probe tip. The specified sensitivity is 200 mV/mil (7.87 mV/um) +/- 10%, with a frequency response of 0.5 Hz to 12 kHz at +/- 3 dB.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 109549-01 |
| Brand | Bently Nevada |
| Operating Temp | Standard: -35 deg C to +125 deg C at probe tip |
| Power Consumption | Not specified in supplied data |
| Product Family | 3300 System |
| Component Type | 3300 XL NSv Photoelectric Probe |
| Measurement Principle | Eddy-current proximity sensing |
| Nominal Probe Tip | 8 mm sensor family |
| Sensitivity | 200 mV/mil (7.87 mV/um) +/- 10% |
| Frequency Response | 0.5 Hz to 12 kHz, +/- 3 dB |
| Humidity | 100% RH, non-condensing |
| Extended Temperature Options | Up to 150 deg C or 175 deg C |
Eddy-Current Probe Scaling and Gap Validation
The 109549-01 uses an eddy-current proximity sensing principle to convert the probe-to-target relationship into an electrical measurement. The specified sensitivity establishes the nominal output scaling at 200 mV/mil, equivalent to 7.87 mV/um, with a tolerance of +/- 10%.
During commissioning, verify the probe system against the applicable Bently Nevada monitor and Proximitor interface. In addition, confirm the required gap voltage target before accepting the measurement channel. Bently Nevada proximity systems commonly use a negative DC bias, with -10 VDC serving as an established reference target for applicable probe installations. Do not assume this value applies to every associated interface without checking the system documentation.
The specified frequency response extends from 0.5 Hz to 12 kHz at +/- 3 dB. Therefore, installation and signal routing should preserve the probe signal bandwidth and avoid unnecessary coupling with high-current or switching conductors.
Frequently Asked Questions
Q: What is the specified operating temperature for the 109549-01 probe tip?
A: The standard probe-tip range is -35 deg C to +125 deg C. Extended-temperature options up to 150 deg C or 175 deg C are specified as available options.
Q: What sensitivity does the 109549-01 provide?
A: The specified sensitivity is 200 mV/mil, equivalent to 7.87 mV/um, with a tolerance of +/- 10%.
Q: What frequency range does the probe support?
A: The specified frequency response is 0.5 Hz to 12 kHz at +/- 3 dB.
Field Installation Guidelines
- Confirm the complete 109549-01 assembly and its compatible interface hardware before installation.
- Verify the probe mounting position and mechanical clearance against the applicable 3300 System installation documentation.
- Maintain the specified probe-to-target geometry during installation and commissioning.
- Route probe signal wiring separately from high-voltage, high-current, and high-frequency switching conductors where practical.
- Use the specified cable and termination arrangement for the associated Bently Nevada proximity system.
- Connect cable shields and grounding points according to the system installation documentation. Avoid creating unintended ground loops.
- Verify the probe gap voltage and signal output before placing the measurement channel into service.
- Confirm the actual operating temperature at the probe tip, especially where extended-temperature options are required.
- Check the complete signal chain from probe through the associated interface and monitor before enabling alarm or trip functions.
- Record the measured commissioning values and compare them with the applicable system limits before placing the channel into operational service.
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