330101-00-32-10-02-05 Bently Nevada 3300 XL 8 mm Proximity Sensors

Bently Nevada 330101-00-32-10-02-05 3300 XL 8 mm Proximity Probes

The Bently Nevada 330101-00-32-10-02-05, also cataloged as the 330101 Proximity Sensors, operates as a dedicated hardware component for high-precision vibration monitoring and dynamic position tracking within TSI platforms. The assembly features a 3/8-24 UNF threaded body, an unthreaded length code of 00, a 3.2 in overall case length, and an integrated 1.0 m cable terminating in a ClickLoc miniature coaxial connector with armor. While working alongside a 3300 XL Proximitor Sensor, the probe continuously detects metallic surface displacement, converting proximity gap shifts into proportional high-frequency analog signals.

Suffix Breakdown & Model Matrix

Hardware Specifications

Eddy-Current Probe Scaling & Rotor Dynamics

The transducer employs precise eddy-current probe scaling to translate mechanical shaft movements into proportional electrical variations. When the driver circuit supplies radio-frequency current to the probe tip coil, the coil projects an alternating magnetic field into the target shaft material. Subsequent shaft motion changes the formation of eddy currents in the metal target, altering the total coil impedance. Consequently, the connected Proximitor sensor conditions this impedance change into a linear output voltage scaled at 7.87 V/mm (200 mV/mil). During initial field configuration, maintenance personnel conduct gap voltage validation (-10 VDC targets) to set the physical operating point at the center of the dynamic range. This alignment maintains active cross-talk suppression and captures rapid amplitude spikes caused by rotor dynamics instabilities.

Frequently Asked Questions

Q: How do technicians verify proper physical gap calibration prior to locking the mounting nut?

A: Technicians rotate the probe body inside the mounting bracket while tracking the DC output voltage at the Proximitor sensor terminals. Adjusting the physical spacing until the DMM reads exactly -10 VDC fixes the probe at the midpoint of its linear measurement curve.

Q: How does the ClickLoc connector mechanism prevent signal loss in high-vibration machinery housings?

A: The ClickLoc coaxial connector features a mechanical locking detent that prevents thread back-out under heavy vibration. Sliding the rubber protective boot completely over the coupled joint seals out oil, moisture, and conductive debris.

Field Installation Guidelines

1. Mounting Hole Engagement: Thread the 3/8-24 UNF body into the tapped mounting hole. Ensure a minimum engagement of 5 full threads so that the assembly withstands continuous physical vibration.
2. Gap Setting Execution: Connect the probe to the extension cable and power up the Proximitor unit. Adjust the probe position until the multimeter displays -10 VDC (-10.0 VDC +/- 0.2 VDC), then secure the lock nut to 13.5 N-m (120 in-lb) maximum torque.
3. Cable Bend Radius Controls: Route the armored cable along structural steel members using insulated support clamps. Keep a minimum bend radius of 25.4 mm (1.0 in) to protect the internal coaxial center conductor against physical fatigue.
4. Shield Isolation and Grounding: Terminate the cable shielding braid exclusively at the Proximitor terminal strip ground. Keep the probe housing electrically isolated from local machine frame ground to block earth circulating currents.