Interesting discussion, this.
If a torque screwdriver has to be calibrated, is this an annual thing?
Kenny Ken has a point.
If the driver is used once a week, for a CU change say, that's one situation...but if you do 5 a week, should the driver be calibrated more often?
I see a difference between "mechanical" calibration and "electronic" calibration of a MFT. The former has a mechanical wear and tear element that may not be applicable to a MFT?
I expect that most of you will know just how tight is right...and i am willing to bet that even if the driver tells you it's right, if you are in any doubt you will resort to just manually checking anyway?
Maybe you all tighten the terminals, tidy up, then give them all a wee further tighten before you go home?
Better tight than slack?
No point in exhibiting a test certificate if patently the terminals are too loose, imho...the buck stops with you regardless.