Tshawb xyuas qhov xau tam sim no ntawm lub tsheb thiab seb lub multimeter puas nyob hauv AC lossis DC iav
Txheeb xyuas qhov xau tam sim no ntawm lub tsheb thiab muab tso rau hauv DC tam sim no. Ua ntej, disconnect lub ntsiab kev rho tawm ntawm tus neeg siv lub hwj chim inlet, thiab tua tag nrho cov hluav taws xob loads ntawm tus neeg siv, xws li unplugging lub tub yees plug thiab disconnecting dej twj tso kua mis hloov. Muab cov digital multimeter nyob rau hauv 200M ntau yam ntawm Ohm ntau yam, nrog rau ib qho kev sojntsuam tso rau ntawm ib qho ntawm ob lub xov hlau tso rau ntawm qhov chaw thauj khoom, thiab lwm qhov kev sojntsuam kov cov phab ntsa, nyiam dua cov xaim hauv av lossis cov xaim hauv av ib ntus.
Tom qab tus naj npawb tso tawm ntawm lub multimeter stabilizes, qhov kev nyeem ntawv yog cov nqi hluav taws xob tsis zoo ntawm cov kab tseem ceeb. Yog tias tus nqi hluav taws xob tiv thaiv qis dua {{0}}.5 megohms, nws yog ib qho teeb meem nrog cov kab loj. Yog hais tias lub rwb thaiv tsev tsis kam siab tshaj 0.5 megohms, nws tuaj yeem txiav txim siab tias muaj teeb meem nrog cov kab tseem ceeb.
Cov ntaub ntawv txuas ntxiv:
Ntxiv nrog rau roj teeb to, lub Circuit Court kuj siv qee qhov tam sim no. Tsis muaj kev rwb thaiv tsev kiag li, thiab ntau qhov kev thauj khoom tsis raug cuam tshuam ncaj qha thaum lub qhov tseem ceeb hloov pauv, xws li cov khoom siv tiv thaiv tub sab uas siv qee qhov tam sim no. Cov tsheb tsoos feem ntau muaj qhov tsaus ntuj ntawm ib ncig ntawm 30 milliamperes, raws li ntau cov khoom siv hauv lub nkoj tau teeb tsa, qhov tam sim no zoo li qub kuj yuav siab, tab sis nws tsis tuaj yeem tshaj 50 milliamperes.
Vim hais tias lub tsheb roj teeb feem ntau nyob ib ncig ntawm 60 ampere teev, 60 * 1000 ÷ 50=1200 teev, 1200 ÷ 24=50 hnub, uas yog hais, nyob rau hauv ib tug to tam sim no ntawm 50 milliamperes, ib lub roj teeb theoretically yuav siv sij hawm 50 hnub. kom tso tawm tag nrho nws cov hluav taws xob. Qhov tseeb, nws tsis tuaj yeem tso tawm tag nrho, thiab lub tsheb tsis tuaj yeem pib tom qab khaws cia rau ib hlis.
Txiav txim siab yog tias qhov tsaus nti tam sim no ntawm tag nrho lub tsheb loj dua 50 milliamperes, xws li 80 milliamperes, 80-50=30 milliamperes, 30 * 12 / 1000=0.36 watts. Koj tuaj yeem txiav txim siab seb qhov twg lub zog zoo li qub nyob ze rau qhov no, xws li qhov tam sim no zoo li qub ntawm cov cuab yeej navigation. Txhawm rau xyuas seb lub hwj chim ntawm cov cuab yeej navigation tsis raug tua.
Yog tias koj tsis tuaj yeem nrhiav tau cov ntsiab lus xau tam sim no, 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 tshwm sim los ntawm multimeter dheev poob, qhia tias qhov teeb meem nyob. hauv lub voj voog no. Tom qab ntawd, txiav tawm ntawm qhov hluav taws xob sib cais thiab txuas ntxiv kom nqaim qhov ntau kom txog thaum koj pom qhov tsim nyog xau.
