Configured for radial vibration and axial position measurement in rotating machinery, the Bently Nevada 330130-070-00-00 (330130-070-00-00 Proximity Probe) provides direct physical execution of displacement sensing via eddy-current induction.

Configuration and Model Definition

The 330130-070-00-00 designates an 8mm probe component within the 3300 XL series. The specific configuration utilizes a 070 (7.0 meter) cable length, which integrates the probe tip, cable, and connector assembly. This component is designed to interface with the 3300 XL Proximitor Sensor to maintain system linear range and signal integrity.

Technical Performance Parameters

Mechanical Monitoring and Eddy-Current Scaling

The 3300 XL system relies on eddy-current probe scaling to convert target displacement into a proportional voltage signal. Calibration is typically performed against an AISI 4140 steel target. The 330130-070-00-00 must be adjusted to a mid-range gap voltage of -10 VDC during installation to ensure the sensor operates within the linear portion of its response curve. Proper rotor dynamics analysis requires that the probe is mounted rigidly to suppress mechanical resonance, as any vibration in the probe assembly itself will be interpreted as target displacement.

Ordering and Package Contents

• 1 x 330130-070-00-00 8mm Proximity Probe

• 1 x Protective Connector Cap

• 1 x Installation Instruction Sheet

• 1 x Calibration Data Tag

Installation and Integration Procedures

• Mounting Requirements: Ensure the mounting bracket provides sufficient stiffness to prevent natural frequency interference with the monitored machine.

• Gap Setting: Utilize a feeler gauge or depth micrometer to set the probe gap to the manufacturer specified distance, targeting -10 VDC output from the Proximitor.

• Cable Routing: Route the coaxial cable through shielded conduit to minimize electromagnetic interference (EMI). Maintain a minimum bend radius of 25 mm to prevent cable damage.

• Grounding: Ensure the probe housing is electrically isolated from the machine case if specified by the loop configuration to prevent ground loops.

Technical Inquiry Clarifications

• Q: Can this probe be used with non-standard extension cables?

  A: No. The 3300 XL system is impedance-matched. Using cables other than official 3300 XL components will alter the system scaling and cause significant measurement errors.

• Q: What is the maximum operating distance?

  A: The linear range is 2 mm. Operation beyond this range results in non-linear signal output and potential loss of vibration data.

• Q: How does cable length affect the signal?

  A: The 070 designation indicates a 7.0m length calibrated for specific system impedance. Extending this cable will introduce signal attenuation and phase shift.

• Q: Is the probe tip heat resistant?

  A: Yes. The Polyphenylene Sulfide (PPS) tip is rated for continuous operation up to 177 deg C.

• Q: How do I verify if the probe is functioning?

  A: Measure the gap voltage at the Proximitor output terminals using a high-impedance digital multimeter.

• Q: Can the probe be painted?

  A: No. Foreign material on the probe tip, including paint or heavy grease, will disrupt the eddy-current field and degrade accuracy.

• Q: What is the purpose of the 303 stainless steel housing?

  A: It provides chemical resistance and structural integrity in harsh industrial environments including oil and moisture exposure.

• Q: Does this probe require external power?

  A: The probe is passive. It receives a high-frequency carrier signal from the Proximitor sensor which provides the necessary excitation.