Kev ntsuas qhov ntsuas qhov ntsuas ntawm digital multimeter
Feem ntau, AC voltage iav yog siv los ntsuas qhov av voltage ntawm cov khoom siv, thiab cov iav tiv thaiv yog siv los ntsuas qhov av tsis kam ntawm qhov energized nyob rau hauv cov ntaub ntawv ntawm lub hwj chim tsis ua hauj lwm.
Rau cov teeb meem loj heev, koj tuaj yeem siv cov iav tiv thaiv ntawm multimeter kom paub, tab sis qhov xau tsis loj, thiab multimeter ntsuas tsis tau. Thaum ntsuas cov rwb thaiv tsev, koj tuaj yeem siv cov ntsuas hluav taws xob tiv thaiv hluav taws xob, xws li shaker, digital megohmmeter, thiab lwm yam. Cov cuab yeej no tuaj yeem simulate qhov kev ua haujlwm tiag tiag, thiab qhov ntsuas hluav taws xob ntawm multimeter yog tsawg heev.
Ua ntej nug tus neeg siv kho qhov teeb meem txhaum cai tau tshwm sim thiab qhov pom tseeb tau tshwm sim; Tom qab ntawd, saib seb puas muaj qhov tsis txaus ntseeg ntawm qhov chaw, thiab tom qab ntawd mus rau kauj ruam tom ntej ntawm kev tshuaj xyuas.
1. Tshem tawm qhov hloov pauv tseem ceeb ntawm tus neeg siv khoom siv hluav taws xob, thiab tua tag nrho cov khoom siv hluav taws xob ntawm tus neeg siv, xws li tshem tawm lub tub yees, disconnect lub twj tso kua mis hloov, thiab lwm yam.
2. Muab lub iav ntawm lub tshuab digital multimeter rau ntawm 200M iav ntawm ohm iav, muab ib qho kev xeem coj mus kuaj ntawm ib qho ntawm ob lub qhov hluav taws xob nyob ntawm qhov chaw thauj khoom, thiab lwm yam kev sim cov hlau lead kov cov phab ntsa, nyiam dua kov cov av xaim lossis ib ntus grounding Wire. Tom qab tos tus naj npawb tso tawm ntawm lub multimeter kom ruaj khov, nyeem tawm cov nqi rwb thaiv tsev ntawm cov kab tseem ceeb. Yog tias tus nqi hluav taws xob tiv thaiv tsawg dua 0.5 megohm, ces muaj teeb meem nrog lub ntsiab Circuit Court. Yog hais tias lub rwb thaiv tsev tsis kam siab tshaj 0.5 megohm, nws tuaj yeem txiav txim siab tias nws yog lub hauv paus loj. Muaj teeb meem nrog kev xaim. Ntsuas lwm cov hlau nyob rau hauv tib txoj kev, thiab kuj xyuas cov nqi kom pom tias muaj teeb meem nrog lub ntsiab hlau.
3. Tshawb xyuas cov nqi hluav taws xob tiv thaiv ntawm shunt thiab txhua yam khoom siv hluav taws xob, thiab siv tib txoj kev los ntsuas ib qho los ntawm ib qho kom txog thaum pom qhov txhaum.
