Yuav ua li cas ncaj qha txheeb xyuas qhov sib thooj hloov nrog multimeter?
Cov kev sib txuas sib txuas tau muab faib ua ob lub xov hlau thiab peb cov xov hlau. Cia peb piav qhia nyias hauv qab no.
Ua ntej ntawm tag nrho cov, nws yog peb-xaim, thiab peb-xaim sib thooj keyboards yog dav siv. Cov zis tau muab faib ua NPN thiab PNP. Peb-xaim qhov sib thooj hloov pauv xav tau lub zog ntxiv rau kev ua haujlwm, yog li nws yuav tsum tau siv lub zog ua ntej ntsuas. Feem ntau, cov xaim yog 12-24VDC xim av, 0V hauv xiav thiab cov teeb liab tso tawm dub. Peb txuas cov xov hlau thiab lub hwj chim rau, muab cov khoom tso rau pem hauv ntej ntawm qhov sib thooj hloov thiab kom ze li sai tau. Yog hais tias qhov sib thooj hloov mus pom ib yam khoom, nws qhov tso zis qhov taw qhia teeb yuav teeb. Nws muaj qhov chaw uas koj yuav tsum paub tias qhov kev sib thooj sib thooj no pom dab tsi. Yog tias koj tsis paub, koj tuaj yeem sim ntau yam khoom, xws li hlau thiab hlau nplaum. Yog tias tag nrho cov no tau sim thiab qhov ntsuas lub teeb tsis nyob, ces koj tuaj yeem siv multimeter los ntsuas. Txawm nws zoo li cas los xij, tsuas yog ntsuas cov kab teeb liab thiab qhov hluav taws xob ntawm 24V lossis 0V kom pom tias muaj qhov voltage. Yog tias tsis muaj qhov hluav taws xob, nws txhais tau hais tias qhov sib thooj hloov tau tawg. Yog tias qhov taw qhia lub teeb qhib, nws yog qhov zoo, yog li tsis tas yuav ntsuas.
Ua raws li ob-xaim, ob-xaim sib thooj hloov tsis xav tau lub zog ntxiv, tab sis nws kuj tau muab faib ua ob qhov sib txuas. Txoj kev ntsuas yog qhov pib zoo ib yam li ntawm kab thib peb. Cov xim ntawm ob kab feem ntau yog xim av thiab xiav. Thawj qhov kev sib txuas yog tias cov xaim xiav txuas nrog 0V, thiab cov xaim xim av txuas nrog lub teeb liab. Los yog siv ib yam khoom los mus rau qhov sib thooj hloov. Yog hais tias qhov sib thooj hloov tau zoo, qhov taw qhia lub teeb yuav qhib. Yog tias tsis yog, nws tuaj yeem ntsuas nrog lub multimeter. Ntsuas seb puas muaj qhov hluav taws xob ntawm cov kab teeb liab thiab 24V voltage. Tsis muaj dab tsi phem. Lwm qhov kev sib txuas thiab kev ntsuas tsuas yog qhov sib txawv.
