multimeter yuam kev
Qhov tseeb ntawm multimeter yog hais txog qhov ntsuas ntau yam (200mv/2v/20v/200v/1000v) thiab qhov yuam kev ntau (ntxiv rau -(0.5 feem pua ntxiv 3)) ntawm qhov ntsuas no.
E.g:
Yog tias tus nqi ruaj khov yog 110V DC, nws yog qhov yuav tsum tau ntaus DC 200V iav, thiab nws qhov kev ntsuas qhov yuam kev yog 110v ntxiv (ntxiv rau -(0.5 feem pua ntxiv 3))v
Yog tias tus nqi ruaj khov yog 220V AC, nws yog qhov yuav tsum tau ntaus AC 750V iav, thiab nws qhov kev ntsuas qhov yuam kev yog 220v ntxiv (ntxiv rau -(0.8 feem pua ntxiv 5))v
Yog tias tus nqi tsis raug, kom paub meej tias nws tsis muaj zog.
Siv lub DC voltage 2V point ua piv txwv:
Qhov tseeb qhov yooj yim yog: ±({{0}}.5 feem pua ntxiv rau 3), yog tias koj lub multimeter qhov kev daws teeb meem 2V yog 0.001V;
Tom qab ntawd lub siab txwv qhov yuam kev{{0}}*(1 ntxiv rau 0.5%) ntxiv rau 0.001*3=2.013V
yuam kev qis qis =2*(1-0.5 feem pua)-0.001*3=1.987V
Yog li qhov yuam kev ntawm 2V yog ±0.013V
