Txheeb xyuas qhov xau tam sim no ntawm lub tsheb, seb lub tshuab hluav taws xob puas tso rau hauv AC iav lossis DC iav
Txheeb xyuas qhov xau tam sim no ntawm lub tsheb thiab muab tso rau hauv DC tam sim no, ua ntej txiav tawm lub ntsiab sib cais ntawm tus neeg siv lub zog hluav taws xob, thiab tua tag nrho cov neeg siv hluav taws xob, xws li tshem tawm lub tub yees, disconnecting lub twj tso kua mis hloov, thiab lwm yam. . Muab cov iav ntawm lub tshuab digital multimeter rau ntawm 200M iav ntawm ohm iav, tso ib qho kev xeem coj mus rau ib qho ntawm ob lub qhov hluav taws xob ntawm qhov chaw thauj khoom, thiab lwm qhov kev sim cov hlau lead kov cov phab ntsa, nyiam dua hauv av xaim lossis cov xaim hauv av ib ntus. .
Tom qab tus lej tso tawm ntawm lub multimeter yog qhov ruaj khov, qhov ntsuas hluav taws xob tiv thaiv tus nqi ntawm cov kab tseem ceeb tau nyeem. Yog tias tus nqi hluav taws xob tiv thaiv qis dua {{0}}.5 megohm, ces muaj teeb meem nrog cov kab tseem ceeb. Yog hais tias lub rwb thaiv tsev tsis kam siab tshaj 0.5 megohm, nws tuaj yeem txiav tawm. Nws yog ib qho teeb meem nrog cov kab tseem ceeb.
Ntxiv nrog rau cov dej xau ntawm lub roj teeb, cov kab kuj tseem yuav haus qee yam, tsis muaj qhov kev tiv thaiv zoo, thiab ntau qhov kev thauj khoom tsis ncaj qha txiav tawm thaum lub qhov tseem ceeb hloov, xws li cov cuab yeej tiv thaiv tub sab yuav haus qee qhov tam sim no. . Nyob rau hauv ib lub tsheb ib txwm, qhov tsaus nti tam sim no feem ntau nyob ib ncig ntawm 30mA. Vim tias muaj ntau yam khoom siv hluav taws xob nyob rau hauv lub nkoj tau teeb tsa, qhov quiescent tam sim no kuj loj, tab sis nws tsis tuaj yeem siab dua 50mA.
Vim tias lub tsheb roj teeb feem ntau yog 60 ampere teev, 60 * 1000÷50=1200 teev, 1200÷24=50 hnub, uas yog hais, lub roj teeb, nyob rau hauv cov xwm txheej ntawm 50 mA to tam sim no, theoretically siv 50 hnub kom them tag nrho Tom qab tso tawm tag nrho cov hluav taws xob, qhov tseeb, nws tsis tuaj yeem tso tawm tag nrho lawv. Feem ntau, lub tsheb tsis tuaj yeem pib tom qab ib hlis.
Xyuas kom tseeb tias qhov tsaus nti tam sim no ntawm tag nrho lub tsheb loj dua 50mA, piv txwv li, 80mA, 80-50=30mA, 30 * 12/1000=0.36W, koj tuaj yeem txiav txim siab seb qhov twg lub hwj chim zoo li qub nyob ze rau qhov no, piv txwv li Lub quiescent tam sim no ntawm tus navigator kuj nyob ze rau qhov no, thiab nws yuav tsum tau xyuas seb lub hwj chim ntawm tus navigator tsis raug tua.
Yog tias koj nrhiav tsis pom qhov twg cov dej ntws tawm, koj tuaj yeem tshem tawm cov fuses, relays, lossis tshem tawm cov xov hlau hauv av ntawm qee qhov kev thauj khoom ib los ntawm ib qho kom pom qhov twg cov xau tam sim no tso tawm los ntawm multimeter mam li nco dheev, qhia tias qhov teeb meem nyob hauv qhov no. Circuit Court. Sab hauv, thiab tom qab ntawd los ntawm sab hauv ntawm lub voj voog no, txiav lawv cais thiab txuas ntxiv kom nqaim qhov ntau kom txog thaum koj pom qhov tsim nyog xau.
