Multimeter peb-theem raj ntsuas qhov zoo lossis qhov tsis zoo
Nws yog ib qho yooj yim heev los siv lub multimeter los txiav txim seb lub triode zoo los yog phem. Ntawm no peb coj cov digital multimeter ua piv txwv los qhia txog txoj kev txiav txim siab (tus pointer multimeter qub dhau lawm thiab muaj ib txoj haujlwm, thiab tam sim no txawm tias African cov neeg nyiam siv hluav taws xob tsis kam siv nws).
Ua ntej, cia peb tham txog qhov sib npaug hauv Circuit Court ntawm triode. Raws li pom hauv daim duab, sab laug ntawm daim duab yog NPN hom triode, thiab sab xis yog qhov sib npaug ntawm NPN hom triode. Nws tuaj yeem pom tau tias rau NPN transistor, qhov sib txuas (PN kev sib tshuam ntawm lub raj puag b thiab lub emitter e) thiab bc kev sib tshuam (PN kev sib tshuam ntawm lub raj puag b thiab cov khoom siv c) yog sib npaug rau ob lub diode. txuas nrog lub anode. Ib yam li ntawd, PNP transistor nyob rau sab xis ntawm daim duab tuaj yeem sib npaug rau ob lub diodes txuas rau ib leeg.
Nws tuaj yeem pom los ntawm kev txheeb xyuas saum toj no tias txhawm rau txiav txim siab seb lub triode puas yog qhov zoo lossis qhov tsis zoo, nws tsuas yog yuav tsum tau siv lub diode thaiv ntawm digital multimeter los ntsuas qhov zoo ntawm nws qhov sib txuas thiab bc junction.
Ntawm no peb coj cov feem ntau siv NPN silicon triode ua piv txwv (germanium triode yuav luag tsis siv tam sim no), thaum ntsuas, tig lub digital multimeter rau diode block (saib daim duab), kov b ncej ntawm triode nrog liab cwj mem ntawm lub multimeter, thiab tom qab ntawd, Siv ib qho kev sim dub coj los kov tus e ncej thiab c ncej ntawm lub triode feem. Lub sijhawm no, kev nyeem ntawv pom los ntawm multimeter yog qhov kev poob qis rau pem hauv ntej ntawm PN hlws ris, thiab nws cov nqi feem ntau yog nyob nruab nrab ntawm ".{500-.700". Lub b ncej thiab tus cwj mem liab yog nyob rau hauv kev sib cuag nrog tus ncej e thiab c ncej ntawm lub triode. Nyob rau lub sijhawm no, kev nyeem ntawv tso tawm los ntawm multimeter yog qhov rov qab qhov hluav taws xob poob ntawm PN hlws ris, thiab cov ntawv nyeem yog tag nrho "1", yog li ntawd lub triode tuaj yeem pom tau tias yog qhov zoo.
Thaum ntsuas, yog qhov kev nyeem ntawv ntawm ib qho kev sib tshuam yog ".{000" los yog lub zog rau pem hauv ntej thiab thim rov qab yog ob qho tib si "1", ces qhov sib txuas ntawm lub raj puas thiab lub raj siv tsis tau.
Rau ib tug zoo triode, siv lub diode thaiv ntawm lub multimeter los ntsuas qhov voltage poob ntawm nws cov ncej. Txawm hais tias qhov hluav taws xob poob rau pem hauv ntej lossis rov qab voltage poob, kev nyeem ntawv ntawm multimeter yuav tsum tso saib "1". Yog hais tias qhov kev nyeem ntawv tso tawm raws li "000", ces lub raj tau tawg lawm, tsis zoo, thiab siv tsis tau. Yog tias muaj qee tus nqi tshwm sim, nws txhais tau hais tias qhov nkag mus tam sim no Iceo ntawm lub raj yog qhov loj. Txawm hais tias nws tuaj yeem siv tau, kev ua haujlwm ruaj khov tsis zoo, yog li nws tsis pom zoo kom siv nws.
