Yuav ntsuas seb puas muaj cov dej xau nrog digital multimeter
Txoj kev ntsuas qhov dej ntws
Ua ntej, disconnect lub ntsiab kev rho tawm ntawm tus neeg siv lub hwj huam mov, thiab tua tag nrho cov hwj huam loads ntawm tus neeg siv, xws li unplugging lub tub yees thiab disconnecting lub twj tso kua mis hloov.
Muab lub iav ntawm lub tshuab hluav taws xob digital rau ntawm 200M iav ntawm ohm iav, muab ib lub stylus rau ntawm ib qho ntawm ob kab tawm ntawm sab load, thiab kov phab ntsa nrog rau lwm lub stylus , zoo dua kov cov xaim hauv av lossis ib ntus hauv av xaim. Tom qab tus naj npawb tso tawm ntawm lub multimeter yog qhov ruaj khov, cov nqi hluav taws xob tsis zoo ntawm cov kab tseem ceeb tau nyeem tawm. Yog tias tus nqi hluav taws xob tsis zoo yog tsawg dua 0.5 megohm, muaj qee yam tsis zoo nrog cov kab tseem ceeb. Yog hais tias lub rwb thaiv tsev tsis kam siab tshaj 0.5 megohm, nws tuaj yeem txiav txim siab tias muaj ib yam dab tsi tsis ncaj ncees lawm nrog cov kab tseem ceeb. Ntsuas lwm cov hlau nyob rau hauv tib txoj kev, thiab kuj xyuas tus nqi kom pom tias muaj ib yam dab tsi tsis ncaj ncees lawm nrog cov kab tseem ceeb.
Txheeb xyuas qhov ntsuas kev tiv thaiv hluav taws xob ntawm shunt thiab tag nrho cov khoom siv hluav taws xob, thiab sim lawv ib qho los ntawm ib qho tib yam kom txog thaum pom qhov txhaum.
Kev ceev faj rau kev ua haujlwm
Thaum siv 200M block ntawm multimeter ohm block, ceev faj tsis txhob kov cov hlau ntawm lub stylus nrog koj txhais tes thaum ntsuas.
Qhov ntawd yuav ua rau kev nyeem ntawv tsis raug.
Ua tib zoo saib xyuas kev tso tawm ua ntej ntsuas txhua yam khoom siv hluav taws xob los tiv thaiv cov khoom siv hluav taws xob hauv cov khoom siv hluav taws xob los ntawm kev ua phem rau tib neeg.
Txoj kev no yog txoj hauv kev nyab xeeb los nrhiav qhov txhaum thaum tsis muaj hluav taws xob. Txoj kev no kuj tsim nyog rau lub zog.
Kev tshawb nrhiav hauv tsev thiab lub Hoobkas, tab sis hauv kev tshawb nrhiav, tsis yog tsuas yog kom tshem tawm cov khoom siv hluav taws xob mus rau hauv kab, tab sis kuj yuav tsum tau txiav tawm ntawm xoom kab.
Multimeter tuaj yeem siv los ntsuas tsis tau tsuas yog qhov kev tiv thaiv ntawm cov khoom ntsuas, tab sis kuj yog AC thiab DC voltage. Txawm hais tias qee qhov multimeters tuaj yeem ntsuas qhov tseem ceeb ntawm cov transistors thiab cov capacitance ntawm capacitor. Kev paub txog kev siv multimeter yog ib qho kev txawj ntse tshaj plaws ntawm kev siv tshuab hluav taws xob.
Multimeters muaj xws li pointer multimeter thiab digital multimeters. Lub pointer multimeter yog ib qho kev ntsuas ntau yam nrog lub ntsuas lub taub hau ua cov ntsiab lus tseem ceeb, thiab ntsuas tus nqi yog nyeem los ntawm tus pointer ntawm lub ntsuas lub taub hau. Qhov ntsuas qhov tseem ceeb ntawm digital multimeter tau tso tawm ncaj qha hauv daim ntawv digital los ntawm LCD npo, uas yooj yim nyeem, thiab qee qhov ntawm lawv kuj muaj lub suab ua haujlwm. Multimeter yog ib hom 'meter' uas suav nrog voltmeter, ammeter thiab ohmmeter.
Cov ntaub ntawv DC tam sim no ntawm multimeter yog ntau hom DC voltmeter. Qhov hluav taws xob ntau ntawm lub 'meter' tuaj yeem nthuav dav los ntawm kev txuas lub kaw-circuit voltage divider nyob rau hauv parallel. DC voltage ntau ntawm multimeter yog ntau yam DC voltmeter. Qhov voltage ntau ntawm lub 'meter' tuaj yeem nthuav dav los ntawm kev sib txuas ntawm qhov hluav taws xob faib hluav taws xob resistor hauv series. Qhov sib txawv voltage faib cov resistors muaj qhov sib txawv sib txawv. Lub 'meter' lub taub hau ntawm lub multimeter yog magnetoelectric ntsuas *, uas tsuas yog hloov AC rau hauv DC los ntawm kev siv diodes, yog li paub qhov ntsuas ntawm AC.
