Configured for shaft displacement monitoring in mechanical platforms, the Bently Nevada 330901-00-18-70-02-CN (330901-00-18-70-02-CN Proximity Probes) provides direct physical and electrical execution of RF-based position signal conditioning.

Model Suffix Configuration

• 330901: Base Model (3300 NSv Proximity Probe)

• 00: Unthreaded Length (00 mm)

• 18: Overall Case Length (18 mm)

• 70: Total System Length (7.0 meters)

• 02: Connector Type (Miniature coaxial ClickLoc connector)

• CN: Agency Approval (China Certification/Standard)

Hardware Specifications

Mechanical Monitoring & TSI Characteristics

The 3300 NSv system utilizes precise eddy-current probe scaling to convert shaft position data into a linearized voltage output. During commissioning, gap voltage validation against -10 VDC targets at the oscillator interface is required to ensure the probe tip remains within the defined linear measurement range. This system is designed for rotor dynamics monitoring where high-sensitivity displacement detection is required. Cross-talk suppression is maintained via frequency-coded oscillator pairs, which prevent signal interference in installations involving multiple adjacent sensors.

Ordering info

• One (1) 330901-00-18-70-02-CN Proximity Probe

• Protective connector thread caps

• Installation technical documentation

Field Installation Guidelines

• Mechanical Mounting: Thread the probe into the mounting bracket; verify the physical air gap using a feeler gauge to meet the -10 VDC operational target.

• Cabling: Route the coaxial cable through grounded metallic conduit; maintain the specified minimum bend radius to prevent internal cable structural damage.

• Grounding: Establish a continuous ground path from the probe body to the machine housing to maintain a reliable signal reference.

• Connection Verification: Ensure all coaxial connectors are clean and hand-tightened prior to system finalization.

• Static Calibration: Confirm the static gap voltage with a high-impedance multimeter before engaging the monitoring system.

Frequently Asked Questions

• Q: Is this probe compatible with standard 3300 XL oscillator systems?

  A: No, the 330901 NSv probe is strictly intended for use with matched 3300 NSv oscillator units to ensure accurate scaling and frequency response.

• Q: How is the correct probe gap validated?

  A: Measure the DC output voltage at the oscillator terminals with a high-impedance multimeter; the nominal target is -10 VDC within the linear operating range.

• Q: Can the coaxial cable be field-spliced if damaged?

  A: No, field-splicing alters the electrical resonance and impedance of the transducer system, which renders the factory-calibrated scale factor inaccurate.

• Q: What effect does the target material have on sensitivity?

  A: Sensitivity is factory-calibrated for 4140 steel; usage with other materials necessitates a scaling factor adjustment to ensure measurement accuracy.

• Q: What is the purpose of the connector protector cap?

  A: The cap prevents moisture, dust, or grease from entering the coaxial connection, preserving electrical signal integrity.

• Q: Does the probe require an external power supply?

  A: No, it is a passive device; excitation power is provided by the radio-frequency carrier signal generated by the NSv oscillator.

• Q: What causes unstable or drifting signal readings?

  A: Instability is typically caused by loose coaxial connections, electrical ground loops, or physical damage to the probe tip or cable insulation.

• Q: Should thread-locking compound be used during installation?

  A: No, thread-locking compounds may create an insulating barrier that disrupts the critical ground path between the probe body and machine housing.