I know someone with calibrated kit that is better than mine. I bring him beer when I want to check mine. Beer is cheaper than voltage standards!
I want someone to calibrate my 10V reference; my highest resolution DVM indicates ~30ppm error, but is that just the DVM?
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/smiley.gif)
Currently I'm thinking of taking it to Germany, because that might be least expensive. But it might be fun persuading the airport checkers that it
is switched on aand working!