Overview

RS Technologies can provide the equipment needed to calibrate mechanical torque wrenches, such as dial-type and click-type wrenches.

This test procedure provides the steps necessary to check hand torque wrenches and "click" type wrenches..

Test Equipment

1. Model 920 Portable Instrument: Calculates peak torque values for "click" type wrenches and displays peak torque values for other types of hand torque wrenches.
2. Stationary Torque Transducer: Measures the amount of torque that is applied by the hand torque wrench.
3. Transducer Cable: Connects the torque transducer to the Model 920 instrument.
4. Printer (optional): Prints out data and statistics recorded by the Model 920.

Torque Wrench Test Procedure

1. Connect the instrument to the torque transducer and power it up.
2. Perform a transducer calibration and clear the memory.
3. Make sure that the Measurement Mode of the instrument is set to read Peak torque. Refer to the Model 920 instruction manual.
4. Position the drive of the wrench in the correct fitting on the torque transducer. Allow enough room to pull the wrench to reach the desired torque.
5. When checking a "dial-type" wrench, simply pull the wrench in a slow steady pull until the desired reading is reached. Compare that value to the Peak Torque reading displayed on the Model 920. Typically 5- 10 tests are required to satisfy the necessary sample size requirement for most tool testing standards.
6. Consult the manufacturer's specifications and technical information to determine if adjustments to the wrench are necessary to ensure accurate operation and use.
7. Print out data and statistics as desired.

Click Wrench Test Procedure

1. Connect the instrument to the torque transducer and power it up.
2. Perform a transducer calibration and clear the memory.
3. Make sure that the Measurement Mode of the instrument is set to read Click Torque. Refer to the Model 920 instruction manual.
4. Position the drive of the wrench on the top fitting of the torque transducer. Allow enough room to pull the wrench to reach the desired click point.
5. Pull the handle in a slow steady manner through the "click" point then release the handle. The Model 920 will search through the recorded torque to find the point at which the wrench "clicked" and then display the corresponding value.
6. Consult the wrench manufacturer's specifications and technical information to determine if adjustments to the wrench are necessary to ensure accurate operation and use.
7. Print out data and statistics as desired.

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