Bently Nevada TK3-2E TK-3 Proximity System Test Kit

The Bently Nevada TK3-2E (Full Part Number: TK3-2E) simulates shaft vibration and position to mechanically manipulate target proximity and verify the overall linearity, eddy-current scaling, and gap voltage outputs of Proximitor sensor systems. This instrumentation field unit provides precise mechanical displacement to validate the operational thresholds, alarm logic, and trip loops of connected machinery protection systems.

Technical Summary

The test kit integrates a calibrated micrometer spindle to adjust a target button relative to a proximity probe tip, inducing a controlled change in the sensor's eddy-current loop impedance. The connected Proximitor sensor processes this impedance variation into corresponding gap voltage shifts for static calibration. For dynamic verification, an electrically driven wobble plate simulates pre-determined rotor dynamics and vibration amplitudes, allowing verification of the monitoring channels and associated OK relay states.

Hardware Specifications

Engineering Notes

• Dynamic Verification: The integrated wobble plate operates via an electric motor to generate a constant vibration amplitude, allowing continuous verification of the dynamic signal response within the vibration monitor.
• Target Metallurgy: The calibration target button consists of AISI 4140 steel. If the operational machine target utilizes a different alloy, an engineering correction factor must be applied to the calculated scale factor.
• Collet Compatibility: Supplied universal collet assemblies secure probe diameters of 5 mm, 8 mm, 11 mm, and 14 mm without causing mechanical distortion to the external probe case threads.

Field Guidelines

• Shield Grounding: Maintain continuous shield grounding from the proximity probe cable through to the monitoring rack during testing to eliminate external noise infiltration on the analog voltage loop.
• Cable Routing and Bend Radius: When laying out extension cables during verification cycles, maintain a minimum bend radius of 25.4 mm (1.0 in) to prevent changes in the coaxial line impedance.
• EMC Separation: Position the powered TK3-2E unit away from heavy transient power cabling, switching relays, or variable frequency drives (VFDs) to isolate analog multimeter readings from induced electromagnetic noise.
• Micrometer Zeroing: Prior to recording calibration reference points, verify the mechanical and electrical zero point by checking the initial probe-to-target contact without applying excessive torque to the micrometer spindle.

Suffix Breakdown

• -2E: Designates a powered unit featuring an electric motor configured for 115 VAC power inputs with standard English (mil) graduation scales on the micrometer.