Hi, I'm looking for the calibration/adjustment procedure for any of these Multimeters, which are pretty much the same. I couldn't find it anywhere. Any help??
CEM DT-9939/DT-9929 (original manufacturer)
EXtech EX540/EX530 (Americas/Europe)
Digitech/Jaycar QM1575 (Australia)
Hikari HM2920/2900 (Brazil)