Txheeb xyuas qhov xau tam sim no ntawm lub tsheb, lub multimeter muab tso rau hauv AC iav lossis DC iav
Txheeb xyuas qhov xau tam sim no ntawm lub tsheb tau muab tso rau ntawm DC tam sim no, thawj zaug disconnect tus neeg siv lub zog hluav taws xob los ntawm kev sib cais dav dav, kaw 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 digital multimeter rau ntawm 200M thaiv ntawm ohm iav, ib tus cwj mem ntawm qhov chaw thauj khoom ntawm ob lub xov hlau tawm ntawm ib qho ntawm lawv, lwm tus cwj mem kov cov phab ntsa, nws yog qhov zoo tshaj plaws los kov cov xaim hauv av lossis cov xaim hauv av ib ntus.
Tos rau lub multimeter ntawm cov zaub ntawm tus naj npawb ntawm qhov ruaj khov, nyeem tawm cov nqi hluav taws xob rwb thaiv tsev ntawm cov kab tseem ceeb, yog tias tus nqi hluav taws xob tsis zoo yog tsawg dua {{0}}}.5 megohm, ces qhov teeb meem tseem ceeb ntawm kab. , yog hais tias lub rwb thaiv tsev tsis kam yog ntau tshaj 0.5 megohm, nws tuaj yeem txiav txim siab yog qhov teeb meem tseem ceeb.
Ntxiv nrog rau cov roj teeb tawm, cov xaim tuaj yeem kos tau qee qhov, tsis muaj qhov cuam tshuam kiag li, ntxiv rau ntau qhov kev thauj khoom tsis ncaj qha cuam tshuam thaum tus yuam sij hloov pauv, piv txwv li, lub immobilizer zoo li yuav kos qee qhov tam sim no. Cov pa tsheb, qhov dav dav tsaus nti tam sim no nyob rau hauv txog 30 mA, vim yog kev teeb tsa ntawm ntau lub tsheb, qhov tam sim no zoo li qub yuav siab dua, tab sis tsis siab tshaj 50 mA.
Vim tias lub tsheb roj teeb feem ntau yog li 60 ampere teev, 60 * 1000 ÷ 50=1200 teev, 1200 ÷ 24=50 hnub, uas yog hais, lub roj teeb, hauv 50 mA to tam sim no, theoretically 50 hnub ua ntej koj tuaj yeem tso tawm tag nrho cov hluav taws xob, qhov tseeb, nws tsis tuaj yeem tso tawm tag nrho, feem ntau muab tso rau ib hlis yuav tsis tuaj yeem pib lub tsheb.
Txiav txim siab qhov tsaus nti tam sim no ntawm lub tsheb yog ntau dua 50 mA, piv txwv li, 80 mA, 80-50=30 mA, 30 * 12 / 1000=0.36 watts, koj tuaj yeem txiav txim siab seb lub zog zoo li cas thiab qhov no ze dua , xws li qhov tam sim no zoo li qub ntawm tus navigator thiab qhov no los ze zog rau cov cuab yeej navigation kom paub seb tus navigator lub hwj chim tsis raug tua.
Yog tias koj tsis tuaj yeem pom qhov chaw xau, koj tuaj yeem rub tawm qhov kev tuav pov hwm ib qho los ntawm ib qho, relay, los yog tshem tawm qee qhov ntawm qhov chaw thauj khoom, saib seb qhov twg tawg mus rau qhov chaw thaum lub multimeter qhia tau tias poob tam sim ntawd hauv cov dej xau, qhia tias qhov teeb meem yog nyob rau hauv no Circuit Court, thiab ces los ntawm no Circuit Court, ntsig txog, disconnect mus txuas ntxiv mus nqaim down lub Scope ntawm lub to taub point yog nrhiav txoj cai.
