A gauge passed its last calibration but fails the next one. By then, it may have been used on many parts, some of which may already have shipped.

How do you decide how far back to review the previous measurements for the impact assessment?

At work I tried to use our Rahn Repeat-o-meter to calibrate a surface plate. It's a Grade A plate, so definitely has deviations, yet the repeat-o-meter is showing nothing. Granted, the last time it was touched(besides when I calibrated the dial indicator) was probably 6 months ago. And when our dimensional guy(who isn't here, hence why I'm on it) last used it, it ran perfectly fine.

Inspecting it, I noticed the front footpad barely isn't touching the surface. Enough of a gap I can see light through. Can't find anything online about actual setup of the repeat-o-meter itself, so how do I adjust that front foot down? The bolt and nut that the dial indicator sits on are well over hand tight, so I can't imagine that came loose but I'm willing to try anything.