Originally Posted by
TromboneAl
Dan was suggesting checking the calibration after resetting the needle to zero. As you say, the flex property is unlikely to change.
I was just making the point that if that calibration failed, there was no way to adjust it.
Dan's illustration and procedure apply to "clicker" type torque wrenches which can come out of calibration and have no pointer to indicate they have. These can be "rezeroed" with an internal adjustment if you know the error. Torque wrenches used in industrial applications are usually clicker or dial or electronic types and are frequently recalibrated for critical applications.