Bently Nevada TK-3G Proximity Test Kit | Genuine Stock

Bently Nevada TK-3G Proximity System Test Kit Signal Simulator

The Bently Nevada TK-3G (Proximity System Test Kit) serves as the essential global standard for simulating shaft vibration and position to calibrate Bently Nevada monitors. It addresses the critical need for field-verifying the scale factor of proximity probes and the accuracy of the associated 3500 or 9000 series monitoring systems. By using the TK-3G, maintenance engineers can precisely simulate mechanical motion to ensure that machinery protection systems trip correctly during actual high-vibration events, preventing catastrophic asset failure.

Technical Specifications

The TK-3G (Bently Nevada) is engineered for precision and durability in industrial environments:

• Manufacturer: Bently Nevada (Baker Hughes)

• Power Requirements: Universal Air-Driven or Electric (115/230 VAC selectable)

• Vibration Range: 50 to 254 μm (2 to 10 mils) peak-to-peak

• Speed Range: 0 to 5,000 rpm (Variable control)

• Mechanical Dial Micrometer Range: 0 to 25.4 mm (0 to 1.000 in)

• Micrometer Graduation: 0.01 mm (0.001 in)

• Target Plate Material: AISI 4140 Steel (Standard for Proximitor calibration)

• Operating Temperature: 0°C to +50°C (+32°F to +122°F)

• Storage Temperature: -18°C to +65°C (0°F to +150°F)

• Weight: 5.9 kg (13 lbs) including carrying case

Model Code Decomposition

The Bently Nevada TK-3G utilizes a modular ordering code to define its power source and measurement system. Understanding the specific 3BSE025349R1 or similar part configurations relies on these suffixes:

• TK-3G-01 (Electric Metric): Equipped with a 115/230 VAC electric motor for consistent disc rotation and a metric dial micrometer.

• TK-3G-02 (Electric English): Equipped with a 115/230 VAC electric motor and an English (imperial/inches) dial micrometer.

• TK-3G-03 (Air-Driven Metric): Uses a pneumatic drive (requires external air supply) for explosive environments; includes a metric micrometer.

• TK-3G-04 (Air-Driven English): Pneumatic drive version with an English (imperial/inches) micrometer.

Installation and Field Calibration Guide

To achieve accurate results with the TK-3G (Bently Nevada), follow these professional calibration steps:

1. Mounting the Probe: Secure the proximity probe into the probe mount on the kit. Ensure the probe tip is parallel to the 4140 steel target button.

2. Static Calibration (Position): Use the dial micrometer to move the probe toward and away from the target in 0.25 mm (10 mil) increments. Record the voltage output (VDC) from the Proximitor at each step to verify the Average Scale Factor (typically 200 mV/mil).

3. Dynamic Calibration (Vibration): Position the probe over the "wobbulator" portion of the rotating disc. Adjust the gap to the center of the linear range and turn on the motor. The eccentric motion of the disc simulates shaft vibration, allowing you to verify the Peak-to-Peak readings on your MCM monitor.

FAQ: Professional User Support

Q: Why is 4140 steel used for the target plate in the TK-3G?A: Bently Nevada proximity probes are factory-calibrated to AISI 4140 steel. Using the TK-3G target plate ensures that the electrical properties (conductivity and permeability) match the standard calibration curve of the Proximitor.

Q: Can the TK-3G be used to test Keyphasor signals?A: Yes. By placing the probe over the notched section of the disc, the TK-3G (Bently Nevada) simulates the once-per-turn event needed to verify Keyphasor functionality and RPM logic in the 3500/40 monitor.

Q: Is the electric motor dual-voltage?A: Yes, the electric versions of the TK-3G feature a switch-selectable motor for 115 VAC or 230 VAC, making it compatible with global power standards.