I've got a cheapo panel meter (V/I) I'm going to use with my power supply remodel, and I noticed it's quite a bit off compared to my multimeter. Amps show 0.0 when it's actually 0.1, and voltage is low by maybe 0.5 volts or so sometimes. Maybe that's within specs, not sure I care.
Anyway, I noticed some super tiny reference pots with metal casings, one for V and one for I. So I figured what the heck lemme see if I can tweak them.
Turns out when I touch the pot with my metal screwdriver the amps reading goes thru the roof. Like up near max rating of 30A. Apparently they want a plastic screwdriver or something? Good luck finding a tiny plastic screwdriver....
Is this normal and I'm just out of the loop?
Thanks.