330709-000-030-10-02-00 | Bently Nevada | 3300 XL 11 mm Proximity Probe

Configured for high-range displacement sensing in machine monitoring systems, the Bently Nevada 330709-000-030-10-02-00 (330709 11 mm Proximity Probe) provides direct physical execution of non-contact vibration and shaft position measurement. This probe converts mechanical shaft movement into proportional voltage signals for processing by the 3300 XL transducer platform.

Suffix Breakdown & Model Matrix

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics

The 330709 probe utilizes a specific coil geometry requiring an eddy-current probe scaling of 7.87 V/mm (200 mV/mil) relative to AISI 4140 steel. During commissioning, gap voltage validation at the Proximitor sensor output is mandatory; technicians must verify a reading of -10 VDC at the linear center of the probe range to ensure measurement accuracy. To provide robust cross-talk suppression, all transducer cabling must be routed within grounded metallic conduits, maintaining physical isolation from AC power distribution and high-frequency switching sources to prevent noise induction.

Frequently Asked Questions

Q: Can the 330709 11 mm probe be utilized in an 8 mm probe mounting hole?

A: No. The 330709 probe features an M16 x 1.5 metric thread, which is physically incompatible with the standard 3/8-24 or M10 mounting threads found on 5 mm or 8 mm probe assemblies.

Q: Is field-shortening of the 1.0 m integral cable permitted?

A: No. The factory-molded cable is tuned to maintain specific impedance and capacitive characteristics. Any modification to the cable length alters the electrical loop properties and invalidates the system calibration.

Field Installation Guidelines

• Probe Gap Setting: Thread the M16 x 1.5 probe body into the mounting bracket until the required gap is achieved. Secure the assembly with the locking nut to prevent loosening due to mechanical vibration.
• Shielding: Ensure shield continuity is maintained through the ClickLoc connector interface. Ground the shield at the Proximitor sensor terminal block to prevent ground loops.
• Connector Integrity: Inspect the ClickLoc connector for debris before mating. Ensure the connection is fully seated until an audible click is heard, confirming a proper electrical contact.
• Cable Routing: Adhere to the minimum static bend radius of 25.4 mm (1.0 inch). Avoid applying tensile force to the coaxial cable, as mechanical stress deforms the internal conductor and shifts system impedance.