Take NovaTork brand STM Model Torque Wrench as an example,
1.Unscrew the lock knob
2.Unscrew the screw
3. Insert the S3 Allen wrench into the screw hole
4.Insert Allen wrench until to button
5.Insert the square drive of torque wrench into the square hole of transducer, load force on force point of the grip, adjust the Allen wrench while checking the torque tester, increase torque in clockwise, decrease the torque in counter-clockwise, until the torque is comply with torque tester.
6.Remove the S3 Allen wrench
7.Tighten the screw
8.Screw back the lock knob.