Here is the information you will need to test your torque wrenches. The picture is how you will mount the torque wrench in a vise for testing. The tables below are for hanging a weight from the handle.
[Edit: I have updated the tables below. The first were too difficult to use. These are much simpler and easy to read.]Put a mark on the handle at the median location on the torque wrench handle. Notice the median distance in the tables. For example, one table lists [4", 5",
6", 7", 8"] -- 6" is the median location. There are also tables for hanging the weight at 12", 18", 24", 30" and 36". Set your torque wrench to the median torque setting. Hang the weight at the median location first and see if it clicks. Don't change the setting, but reposition the weight until you can determine which location makes the torque wrench click. If necessary, adjust the wrench until it clicks perfectly at the median location.
This table is based on hanging a weight 6" from the socket drive, plus or minus 2 inches.
Adjust the wrench so it clicks at the 6" setting.
This table is based on hanging a weight 12" from the socket drive, plus or minus 2 inches.
Adjust the wrench so it clicks at the 12" setting.
This table is based on hanging a weight 18" from the socket drive, plus or minus 2 inches.
Adjust the wrench so it clicks at the 18" setting.
This table is based on hanging a weight 24" from the socket drive, plus or minus 2 inches.
Adjust the wrench so it clicks at the 24" setting.
This table is based on hanging a weight 30" from the socket drive, plus or minus 2 inches.
Adjust the wrench so it clicks at the 30" setting.
This table is based on hanging a weight 36" from the socket drive, plus or minus 2 inches.
Adjust the wrench so it clicks at the 36" setting.
Have fun and make all your torque wrenches work perfectly.
Dean.