The correct use of torque wrench and the reasons for the failure First, the correct use of torque wrench method 1. Set the required torque value, and the locking device to the lock position;
2. Adjust the torque from the small value to the large value direction. If the value exceeds the set value, adjust it back to the value below the set torque value.
3. Do not directly adjust from the maximum value to the minimum value;
4. Check whether the drive head is suitable, or use the appropriate adapter;
5. The center of grip is the position of applying force;
6. Before applying the force, please make sure that the wrench and the object to which the force is applied are actually combined;
7. The force should be steady and slow, and when the sound is heard, the spring will be released.
8. After use, set the value back to the minimum scale;
9. The operator must pay attention to the use of large torque wrenches.
Second, the torque wrench failure causes 1. The self-locking function can not be adjusted, this happens is often due to the range adjustment exceeds the maximum range; lock key reverse too tight.
2. The overrunning volume does not make a sound. The reason for this is that the direction is adjusted and the wrong position is removed.
3. Torsion joint slipping, this is due to the connector is not installed in place; the direction change button is not pulled into place.
4. The torque value can not be adjusted, this situation is often locked lock state is self-locking.
5. The measurement value is too large, it may be that the acceleration speed is too fast; the torque indicator does not return to zero.
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