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Tester di campionamento tensione corrente con schermo LCD a colori USB 2.0 RIDEN® UM24/UM24C Voltmetro Amperometro Misura carica batteria Resistenza cavo US$14.20 US$12.09 View It

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KD0JXE 24/04/2018

This is the 4 USB measurement device I have purchased. They all report voltage with reasonable accuracy. Except for this one, they are all so inaccurate measuring current as to be useless. I do not have a calibrated current meter, but I do have some pretty good ones. At 60ma this meter read 1.4ma less than another meter I am comfortable with. They both could be off a little or one spot on and the other off by 1.4ma. Either way is close enough.

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