Configured for non-contact shaft displacement monitoring in 3300 XL transducer systems, the Bently Nevada 330102-00-20-50-02-00 (330102 Proximity Probes) provides direct physical signal execution via eddy-current induction.

Model Configuration Logic

The 330102-00-20-50-02-00 identifies an 8 mm probe assembly. The configuration follows Bently Nevada 3300 XL series standardized coding, where specific numerical suffixes define the case length, unthreaded length, and total system length required for matching with 3300 XL Proximitor sensors.

Hardware Specifications

Rotor Dynamics and Transducer Scaling

This proximity probe operates by generating a radio-frequency field that interacts with the target shaft material. The resulting signal is conditioned to a voltage output proportional to the gap distance. Maintaining an accurate gap voltage validation, typically targeted at -10 VDC, is necessary for linear measurement within the specified 2 mm range. Cross-talk suppression is achieved by observing minimum physical separation distances between adjacent probes in multi-transducer arrays to prevent beat frequency interference in the monitoring rack.

Ordering Info

• One (1) 330102-00-20-50-02-00 Proximity Probe

• Two (2) 3/8-24 UNF locking nuts

• One (1) probe cable protection cap

• Factory linearity certification documentation

Field Installation Guidelines

• Mechanical Interface:

• Ensure the mounting port is clear of debris.

• Use a depth micrometer to confirm the gap distance before final locking.

• Electrical Connection:

• Mate ClickLoc connectors using an axial push-and-twist motion.

• Verify the tactile click to confirm positive electrical continuity.

• Grounding Requirements:

• Ensure the probe housing maintains a low-impedance connection to the machine chassis.

• Route coaxial leads within grounded metallic conduit to prevent EMI ingress.

Technical Questions

• What is the impact of shaft material on output?

  The probe is factory-calibrated for 4140 steel. Alternative alloys will shift the scale factor and require site-specific monitor adjustment.

• Is the system length field-adjustable?

  No. The coaxial cable is factory-tuned for impedance matching. Cutting or splicing will result in signal reflections and data inaccuracy.

• What causes a constant -24 VDC output reading?

  This indicates an open circuit, usually caused by a severed coaxial cable or a disconnected ClickLoc coupling.

• How are vibrations suppressed at the mounting interface?

  Use the provided jam nuts to secure the probe body. Ensure the bracket or housing is rigid to prevent mechanical resonance from affecting the signal.

• Can this probe be used for speed measurement?

  Yes. The 8 mm probe detects keyway or target notches to generate a pulse-per-revolution signal for speed monitoring modules.

• What is the maximum allowable cable bend radius?

  Maintain a minimum bend radius of 25 mm to prevent stress on the internal coaxial center conductor and shielding.

• Are these probes interchangeable with legacy 3300 series?

  No. 3300 XL probes are electrically incompatible with legacy 3300 Proximitors due to differences in impedance and modulation frequency.

• How is electrical isolation maintained?

  The probe tip is electrically isolated from the stainless steel housing by the TipLoc process, preventing ground loops.