thats why i bought several of these
Put one on each converter, and have a spare in case i need it
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resolution is 200mv aka 00.2v on the voltage setting
and 200ma aka 00.2a on the amps mode
any reading above those numbers seems to be very close
but the meter is listed at 18ma aka 00.018 power use and it shows 00.2a ...when not charging
(the 18ma power use displays as 200ma
meter will just not display any value less than that
its listed in the paper work instructions
Not Lab grade but great to see what a converter charger is doing at a glance
anyway works ok for adjusting the PM 75 adj
i used my DMM and marked the case for knob position for various voltages, and use this meter to check the amps