Some repairs happen as if by pure luck, and [Sebastian] shows us one such repair on Hackaday.io. He found two Fluke 175 meters being sold on eBay, with one having a mere beeper issue, and another ...

In order to find out if his Fluke 12E+ multimeter ... checking if the hidden features had received their EOL calibration by hooking the meter up to a waveform generator. Apparently, it reads ...