Yuav ua li cas siv ib tug multimeter los ntsuas seb lub Circuit Court yog grounded siv cov kauj ruam kuj
Multimeter yuav ua li cas ntsuas lub Circuit Court yog grounded nrog cov ntaub ntawv tiv thaiv, ua ntej ntawm tag nrho cov, tsis hais txog ntawm kev ntsuas ntawm ib kab thiab cov khoom siv, peb yuav tsum xub ntsuas qhov voltage kom muaj kev ruaj ntseg ntawm tsis muaj voltage, thiab ces lwm yam kev ntsuas, yog hais tias tus capacitance los yog capacitive tsis kam ntawm cov khoom siv tab sis kuj yog thawj qhov tso tawm, thiab tom qab ntawd txiav txim siab qhov kev nyab xeeb ntawm tsis muaj hluav taws xob; thiab tom qab ntawd yuav raug hloov kho rau 2000 megohm multimeter iav qib, tus meter cwj mem ib kawg ntawm lub cev sib cuag hauv av lossis cov khoom siv hlau, thiab lwm yam cwj mem tiv nrog cov khoom siv los yog lub cev ua haujlwm ib txwm ua ntawm cov kab them, yog tias qhov kev tiv thaiv tsawg dua 0.5 megohm uas yog hauv av. Kab ib txwm them lub cev hluav taws xob, yog tias qhov kev tiv thaiv tsawg dua 0.5 megohm uas yog hauv av. Feem ntau ntau dua 0.5 megohm 30 mA leakage protector yuav tsis tiv thaiv kev tiv thaiv yog li feem ntau suav tias yog kab lossis khoom siv tsis yog hauv av. Tab sis kuj nyob ntawm cov khoom siv lossis kab khiav hauj lwm voltage lossis ntau yam kev xav tau.
Nyob rau hauv lub neej txhua hnub, raws li rau lub Circuit Court yog dav heev, kuv tsis paub hais tias yam twg ntawm lub Circuit Court koj yog xa mus rau, muaj hluav taws xob circuits, hluav taws xob nyiaj circuits xa voltage, hluav taws xob lub cev muaj zog circuits, thiab lwm yam, nyob rau hauv peb feem ntau. siv circuits ua piv txwv ntawm yuav ua li cas siv ib tug multimeter resistor thaiv los ntsuas seb lub grounding.
Ua ntej, hluav taws xob circuits, feem ntau, kev ntsuas ntawm hluav taws xob circuits xaiv cov multimeter
Lub rooj nres rau qhov siab tshaj plaws nres 10k nres, tom qab ntawd qhov ntsuas kev tiv thaiv yuav luag ze rau 10K, lub pointer txav me ntsis, thiab tom qab ntawd tus cwj mem mus rau qhov ntsuas, qee cov khoom siv hluav taws xob yuav txawv tom qab tus cwj mem rau qhov sib txawv yuav tsawg dua, vim hais tias nyob rau hauv hluav taws xob circuits, nyob rau hauv thiaj li yuav tiv thaiv high-frequency cuam tshuam, nruab nrog high-frequency capacitors grounded, yog li tus nqi ntawm ib co nqi ntawm cov nqi rau hauv av yog ib txwm. Yog li, feem ntau ua rau tib neeg hnov qhov tshwm sim ntawm loog loog tes, qhov Circuit Court tsis tuaj yeem ntsuas nrog lub rooj tuav, yuav ua rau cov khoom siv hluav taws xob puas.
Thib ob, qhov hluav taws xob xa hluav taws xob hluav taws xob, ua piv txwv, lub teeb pom kev hauv tsev, ua ntej ntsuas thawj zaug kom tshem tawm cov hluav taws xob hloov hluav taws xob, tab sis kuj tseem cuam tshuam qhov kev hloov ntawm cov khoom siv, thiab tom qab ntawd ntsuas qhov xwm txheej hauv av, yog tias qhov kev tiv thaiv ntawm Circuit Court nrog. ib tug multimeter resistor thaiv kev ntsuas ntawm qhov tsis kam mus rau hauv av, qhov kev tiv thaiv ntawm firewire-zero kab yuav tsum yog infinity, multimeter ntsuas ntawm Circuit Court txawm tias nws yog siv nyob rau hauv 2 megohm block los ntsuas, nws yog deb ntawm txaus vim hais tias cov multimeter nyob rau hauv lub laminated roj teeb Voltage tsuas yog 9 volts, teeb pom kev zoo voltage nyob rau hauv 220 volts los yog li ntawd, yog hais tias ua tau, nws yog ib qhov zoo tshaj plaws mus siv tsib puas volts ntawm megohmmeter (xav kom hais tias co lub rooj), qhov ntsuas kuj yuav tsum tau. ntau dua 0, 5 megohm, txhawm rau xyuas kom meej tias lub voj voog tsis xau.
Qhov thib peb, lub cev muaj zog Circuit Court rau hauv av ntsuas, nrog ib tug multimeter los ntsuas tsis yog, tib yam nrog tsib puas volts ntawm megohmmeter los ntsuas lub coil Circuit Court rau hauv av kuj tus nqi kuj ntau dua 05 megohms, yuav tsum tau xav tias muaj kev nyab xeeb, yog hais tias nws yog ib tug tshiab winding ntawm lub cev muaj zog coil rau hauv av kuj tus nqi yuav tsum ntau tshaj 10 megohms. Yog li txhua lub voj voog muaj cov kev cai sib txawv rau qhov kev tiv thaiv tus nqi hauv av, qhov kev xav tau siab voltage rau hauv av rwb thaiv tsev tus nqi yog loj.
