On the click type wrenches, the thought behind setting them to the lowest setting is so that the spring (which compresses the deformable toggle) will take a set.

So, take the tension off.

FAA licensed aircraft / helicopter maintenance facilities check for calibration on tools within the last 12 months generally.

my "Interplanetary" torque wrench has a 1992 calibration sticker from JPL-Pasadena. However nothing bad has happened, it works fine.

Mark Petry
Bainbridge Island, WA USA