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How far to torque wrench is off, or how far the calibrator is off. ;-)

Make certain your source is calibrated occasionall as well.

In both the military and civilian jobs, we all push our calibration standards upward to be checked by a higher-level lab.

We are one of the higher-level labs. I've seen a little oops dropped it change one 25-30 lbs. We had a never used out of the box off by 125 lbs. We usually use inch lbs for anything under 15 foot lbs.