Configured for shaft displacement measurements in 3300 XL monitoring systems, the Bently Nevada 330103-02-12-05-02-CN (330103 Proximity Probe) provides direct physical/electrical execution for gap-to-voltage signal conversion.

Model Suffix Breakdown

The 330103 is an 8 mm proximity probe utilizing a 3/8-24 thread configuration. The part number parameters include:

• 02: Unthreaded length (0.2 inches).

• 12: Overall case length (1.2 inches).

• 05: Total cable length (0.5 meters).

• 02: Connector option (Miniature coaxial ClickLoc).

• CN: Approvals (Approvals variant).

Hardware Specifications

Mechanical Monitoring & TSI Technical Attributes

Signal integrity in rotor dynamics monitoring is governed by precise eddy-current probe scaling. This transducer is calibrated for AISI 4140 steel targets; deviations in target metallurgy require specific sensitivity adjustments. Gap voltage validation targeting -10 VDC is mandatory to ensure linear output response. Proper installation requires maintaining specified counterbore clearances to facilitate cross-talk suppression, preventing capacitive interference between parallel signal loops within the machinery housing.

Ordering info

• 1 x 330103-02-12-05-02-CN Proximity Probe

• 1 x 3/8-24 stainless steel lock nut

• 1 x Silicone connector protective boot

Field Installation Guidelines

• Mechanical Torque:

  Apply a maximum torque of 13.5 N·m (120 in-lb) when securing the probe. Over-torqueing may result in mechanical deformation of the probe body.

• Coaxial Cabling:

  Route cables through rigid, grounded metal conduits to provide electromagnetic shielding and mitigate induced noise from high-voltage motor or drive cabling.

• Connector Engagement:

  Manually seat the ClickLoc connector interface until an audible click is detected. Avoid using metal tools to force connection, as this may compromise internal electrical contact.

• Environmental Protection:

  Install protective boots over the connector interface to prevent moisture and oil ingress, which can induce resistive shunting or signal instability.

Frequently Asked Questions

• Is this probe compatible with standard 3300 XL Proximitor sensors?

  Yes, the 330103 transducer is fully compatible with 3300 XL Proximitor units and requires no specialized system recalibration for standard applications.

• How is the probe gap verified during operation?

  Verification is performed by measuring the DC output voltage from the Proximitor using a digital multimeter while the machine is at a known shaft position.

• Can the probe measure static and dynamic signals simultaneously?

  Yes, the eddy-current principle allows the transducer to capture both the DC shaft center-line position and the AC dynamic vibration signals.

• Is the cable length modification possible?

  No. The cable is a fixed, factory-tuned component of the 3300 XL system. Splicing or modifying the cable alters its characteristic impedance and invalidates data.

• Does the -CN suffix indicate specific certification?

  The -CN suffix denotes regional certification requirements. Verify that the site-specific safety and hazard area documentation aligns with these ratings.

• What happens if the probe tip contacts the target?

  Mechanical contact causes wear on the tip, distorting the RF field and leading to erroneous vibration data or failure of the probe's internal components.

• Why is AISI 4140 steel the standard calibration target?

  The sensitivity of the probe is dependent on the magnetic permeability and electrical conductivity of the target, which are standardized for this alloy.

• Can I replace the probe while the machine is running?

  Replacement is possible if the monitor channel is bypassed; otherwise, removing the probe will cause a signal loss condition triggering protective alarms.