I just received my Nano V3 (the version without the SD card) and I went to check accuracy with a power supply and my calibrated Fluke 87v. At 3 VDC I noticed the Nano was reading 2.88 Vavg. Not the greatest but it would work for what I want to do, which is check audio levels.
I noticed the calibration menu and I wondered if I could adjust it to be more accurate. I fiddled around with it and I was able to get the reading pretty close, 3.04 Vavg. Great, now I just have to save it, and there is the problem, I cannot get the calibration to save. Every time I power cycle the unit the calibration resets to factory defaults.
Does anyone know how to get the calibration to save?