Description

Configured for non-contacting shaft displacement and dynamic vibration measurement in Turbine Supervisory Instrumentation (TSI) systems, the Bently Nevada 330103-00-11-10-02-00 (330103 Proximity Probe) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

The alphanumeric suffix combination defines the specific mechanical and electrical configurations of the hardware assembly:

• 330103: Base model for 3300 XL 8 mm proximity probe with M10 x 1 thread, unarmored.
• 00: Unthreaded Length Option (00 = 0 mm).
• 11: Overall Case Length Option (11 = 110 mm).
• 10: Total Length Option (10 = 1.0 meter / 3.3 feet).
• 02: Connector and Cable-Type Option (02 = Miniature coaxial ClickLoc connector, standard cable).
• 00: Agency Approval Option (00 = Not required / no approvals).

Hardware Specifications

Eddy-Current Probe Scaling & Rotor Dynamics

During operation, high-frequency RF fields generated by the Proximitor loop penetrate the target surface. Consequently, accurate calibration requires an exact eddy-current probe scaling profile that matches the metallurgy of the shaft. To establish a stable operating baseline for rotor dynamics tracking, field engineers must validate that the gap voltage achieves a target value of -10 VDC at the geometric center of the linear zone. Furthermore, tight winding geometries optimize cross-talk suppression, thereby preventing electromagnetic interference between adjacent multi-axis probes installed within the same bearing housing block.

Frequently Asked Questions

Q: What extension cable configuration does this 1.0 meter probe require?

A: This specific 1.0 meter probe requires a matching 3300 XL extension cable to achieve a complete system length. For instance, a standard 5.0 meter Proximitor system requires a 4.0 meter extension cable, whereas a 9.0 meter system requires an 8.0 meter extension cable.

Q: How does a deviation from the AISI 4140 target material affect performance?

A: Any target material other than AISI 4140 steel shifts the eddy-current probe scaling profile. As a result, this variation alters the system scale factor from the standard 7.87 V/mm (200 mV/mil) and necessitates manual cross-calibration.

Field Installation Guidelines

• Mechanical Clearance: Maintain a minimum counterbore clearance of 2 or more probe tip diameters (16 mm minimum) to avoid side-loading errors from surrounding metal structures.
• Torque Limits: When installing the M10 x 1 threaded case into the mounting bracket, do not exceed the maximum allowable tightening torque of 22.6 N m.
• Connector Integrity: Ensure the miniature coaxial ClickLoc connector faces remain completely free of moisture and particulate matter. Subsequently, twist the collar until a mechanical click occurs to confirm lock engagement.
• Shielding Protocols: Leave the coaxial cable shield floating at the probe end. Instead, execute terminal grounding solely at the instrument rack or the Proximitor isolation housing ground terminal block to eliminate ground loops.