Sorry to revive such an old thread, but it's the first Google search result
Does anybody have the calibration procedure for the EX330?
Through trial-and-error, I've figured these out:
VR1 - Adjusts capacity measurement
VR2 - Adjusts AC Volts measurement
VR3 - Adjusts DC Volts measurement
VR5/VR6 affect temperature, though I'm not entirely sure what their relation is
There is one more trim-pot under VR1 (VR4?) but I can't figure out what it does.