Yuav ua li cas zoo yog qhov peb-theem raj ntsuas ntawm multimeter?
Nws yog qhov yooj yim heev los siv lub multimeter los txiav txim qhov zoo ntawm triode. Ntawm no peb coj ib tug digital multimeter ua piv txwv los qhia txog txoj kev txiav txim siab (analog multimeters qub dhau lawm thiab muaj ib qho kev ua haujlwm. Txawm tias African electronics enthusiasts tsis kam siv tam sim no).
Ua ntej, cia peb tham txog qhov sib npaug hauv Circuit Court ntawm transistor, raws li pom hauv daim duab. Sab laug ntawm daim duab yog NPN transistor, thiab sab xis yog qhov sib npaug ntawm NPN transistor. Nws tuaj yeem pom tau tias rau NPN transistor, nws yog junction (PN hlws ris ntawm lub raj puag b thiab lub emitter e) thiab bc hlws ris (PN hlws ris ntawm lub raj puag b thiab lub collector c) yog sib npaug rau ob Diode nrog zoo terminal txuas. Ib yam li ntawd, PNP transistor nyob rau sab xis ntawm daim duab tuaj yeem sib npaug rau ob lub diodes txuas nrog tus ncej tsis zoo.
Los ntawm kev soj ntsuam saum toj no, nws tuaj yeem pom tau tias txhawm rau txiav txim siab qhov zoo ntawm triode, tsuas yog siv lub diode thaiv ntawm lub tshuab digital multimeter los ntsuas qhov zoo ntawm nws qhov sib txuas thiab bc junction.
Ntawm no peb coj cov nquag siv NPN silicon transistor ua piv txwv (germanium transistors yuav luag tsis siv lawm). Thaum ntsuas, kho cov digital multimeter mus rau diode txoj hauj lwm (saib daim duab), kov lub b electrode ntawm lub transistor nrog tus cwj mem liab ntawm multimeter, thiab tom qab ntawd, Siv cov xim dub coj los kov lub e-ncej thiab c-ncej. ntawm triode raws. Lub sijhawm no, kev nyeem ntawv tso tawm los ntawm multimeter yog qhov kev poob qis ntawm PN kev sib tshuam. Nws tus nqi feem ntau yog nyob nruab nrab ntawm ".500-.700". Tom qab ntawd siv cov tshuaj ntsuam dub coj los kov lub transistor. B ncej, tus cwj mem liab hu rau e ncej thiab c ncej ntawm lub transistor. 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 tau pom tag nrho "1", yog li nws tuaj yeem suav hais tias yog qhov zoo ntawm transistor.
Thaum lub sij hawm 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 ib tug multimeter los ntsuas qhov voltage poob ntawm nws ce ncej. Txawm hais tias qhov hluav taws xob poob rau pem hauv ntej los yog qhov rov qab voltage poob, qhov kev nyeem ntawv multimeter yuav tsum yog "1". Yog tias qhov kev nyeem ntawv yog ".{000" ", lub raj tau tawg lawm, tsis zoo, thiab siv tsis tau. Yog tias muaj qee yam muaj nuj nqis tshwm sim, nws txhais tau hais tias qhov nkag mus tam sim no Iceo ntawm lub raj yog loj. Txawm tias nws tuaj yeem siv tau, nws txoj haujlwm ruaj khov tsis zoo thiab nws tsis pom zoo siv.
