Bently Nevada 330703-000-100-10-02-CN 3300 XL 11 mm Proximity Probe

Hardware Specifications

Eddy-Current Probe Scaling and Gap Voltage

The 330703 probe uses eddy-current sensing to convert the physical gap between the probe tip and conductive shaft target into an electrical output. The nominal incremental scale factor is 3.94 V/mm, equivalent to 100 mV/mil.

During commissioning, technicians should establish the probe gap according to the applicable 3300 XL installation procedure and verify the resulting transducer output. In particular, gap voltage validation should use the specified system target condition rather than assuming that mechanical probe position alone confirms correct calibration.

The 11 mm probe geometry provides a larger sensing configuration than standard 8 mm proximity probes. Therefore, engineers can apply it to measurements such as axial thrust position, differential expansion, and reciprocating compressor rod displacement where the specified mechanical geometry permits.

Frequently Asked Questions (FAQ)

Q: What measurement principle does the 330703 use?

A: The probe uses eddy-current sensing to measure the non-contact distance between its tip and a conductive machinery target. The system converts this gap into a proportional electrical signal.

Q: What does the 3.94 V/mm scale factor represent?

A: It represents the nominal incremental output sensitivity of the probe, corresponding to 3.94 V/mm or 100 mV/mil over the specified measurement region.

Q: Does the supplied data specify the probe operating temperature and power consumption?

A: No. The supplied information does not provide specific operating temperature or power consumption values. These parameters should therefore be taken from the applicable Bently Nevada 3300 XL system documentation.

Field Installation Guidelines

• Install the probe using the specified M14 x 1.5 metric thread and maintain the required mechanical clearance from the monitored target.
• Confirm that the probe tip faces the intended conductive target surface without mechanical interference.
• Set and verify the probe gap using the applicable 3300 XL installation procedure.
• Measure the transducer output during commissioning and compare the result with the expected gap voltage and scaling requirements.
• Route the probe cable separately from high-current power conductors and strong electromagnetic interference sources where practical.
• Avoid sharp bends, excessive mechanical tension, and unnecessary cable movement near the probe connector.
• Maintain cable shielding and grounding according to the installed 3300 XL transducer system wiring practice.
• Verify connector engagement before placing the machinery monitoring channel into service.
• Confirm probe polarity, channel assignment, and signal scaling at the associated monitor or signal-conditioning interface.
• For vibration and axial-position measurements, verify the mechanical reference position before applying alarm or trip limits.
• Do not infer unspecified environmental ratings, cable limitations, or installation dimensions from this part number alone.
• Complete final commissioning with the applicable Bently Nevada system manual and the machinery manufacturer’s installation requirements.

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