The Bently Nevada 330701-00-20-40-02-00, also cataloged as the 330701 11 mm Proximity Probe, operates as a dedicated hardware component for non-contact shaft vibration and position measurement within TSI systems.

Part Number Configuration Breakdown

• 330701: 11 mm Proximity Probe
• 00: Unthreaded length (0.0 inch)
• 20: Overall case length (2.0 inches)
• 40: Total probe length (4.0 meters)
• 02: Miniature coaxial ClickLoc connector
• 00: Agency approval (Not required)

Technical Hardware Specifications

Rotor Dynamics and Signal Integrity

The 11 mm transducer system utilizes an eddy-current probe scaling specifically designed for applications requiring higher linear range than standard 8 mm probes. Precise rotor dynamics analysis requires strict adherence to gap voltage validation; the transducer should be gapped to a target of -10 VDC to ensure the signal remains centered within the linear range. To maintain measurement accuracy, cross-talk suppression protocols must be observed by ensuring adequate physical separation between adjacent probes using the same carrier frequency oscillator.

Ordering Info

• 1x 330701 11 mm Proximity Probe
• 1x Connector protector
• 1x Installation instruction reference guide

Installation and Field Guidelines

• Mounting: Ensure the probe is installed in a rigid bracket to prevent mechanical resonance and false vibration readings.
• Grounding: Route coaxial cables through grounded steel conduit to minimize external electromagnetic interference.
• Connection: Secure the miniature coaxial ClickLoc connector until fully engaged to prevent signal discontinuity.
• Torque: Tighten the probe locking nuts to the recommended torque to prevent rotation or migration during machine operation.

Frequently Asked Questions

• What is the maximum linear range of this probe?

  The 11 mm probe provides a linear measurement range of 4 mm.

• Can this probe be used for high-speed shaft monitoring?

  Yes, the 3300 XL platform is engineered for high-frequency response suitable for steam and gas turbine vibration analysis.

• How does the 4.0 meter cable length impact system calibration?

  The system is calibrated as a matched set; the cable length is integrated into the impedance calculation of the transducer loop.

• Is the probe tip material conductive?

  The tip is composed of high-temperature engineered polymer, while the internal coil interacts with conductive targets to generate the signal.

• What should the nominal gap voltage be?

  The recommended installation gap is set to produce a -10 VDC output at the Proximitor sensor output.

• Are there specific requirements for the target material?

  The system is calibrated for AISI 4140 steel; other conductive materials may require a material correction factor.

• How does moisture affect the connector?

  The ClickLoc connector must be kept dry; use the provided connector protector to prevent signal noise or shorts in humid environments.

• What is the consequence of exceeding the operating temperature?

  Temperatures above +177 deg C may cause degradation of the probe coil insulation and permanent loss of calibration accuracy.