Siv lub multimeter los ntsuas qhov kev tiv thaiv pem hauv ntej ntawm diode, vim li cas txhua qhov ntau
Ib qho digital multimeter hloov cov ntsuas ntsuas tus nqi mus rau hauv lub teeb liab digital los ntawm A / D hloov dua siab tshiab nti, thiab tom qab ntawd qhia tus nqi tsis kam. Tus pointer multimeter qhia tus nqi los ntawm deflecting lub taub hau sib nqus. Yog hais tias nyob rau hauv qhov tseeb kev ntsuas, peb pom tau hais tias siv ib tug multimeter los ntsuam xyuas cov kuj ntau yam ntawm ib tug diode tsis muaj nqi kuj nyob rau hauv ob qho tib si rau pem hauv ntej thiab rov qab cov lus qhia, thaum siv ib tug pointer multimeter los ntsuam xyuas lub diode muaj kuj nqi nyob rau hauv pem hauv ntej kev taw qhia, muaj. Feem ntau yog cov laj thawj hauv qab no:
Diode ntsuas hauv Circuit Court boards
Ua ntej, qhov tso zis voltage ntawm qhov tsis kam ntawm tus pointer multimeter thiab digital multimeter sib txawv. Feem ntau, qhov siab tshaj plaws tso zis hluav taws xob ntawm tus pointer multimeter yog 9 volts, thaum lub digital multimeter feem ntau muaj qhov tso zis ntau tshaj ntawm 3 volts. Nyob rau tib lub sijhawm, tsis tsuas yog lawv tso tawm qhov sib txawv voltages, tab sis peb xaiv ntau qhov sib txawv thaum ntsuas, thiab cov zis hluav taws xob ntawm qhov tsis kam ntawm cov ntsuas digital sib txawv ntawm 1.0 volts rau 3.{{5} } volts, Qhov tsis kam tso zis voltage ntawm tus pointer multimeter feem ntau siab dua li ntawm digital multimeter. Cov zis hluav taws xob ntawm lub pointer multimeter yog ntau dua li qhov voltage poob tus nqi ntawm diode, thiab lub diode tuaj yeem ua tau. Txawm li cas los xij, qee zaum lub tshuab hluav taws xob digital me dua li qhov ntsuas hluav taws xob poob ntawm diode, ua rau lub diode tsis ua haujlwm. Qhov no tuaj yeem ua rau infinite rau pem hauv ntej thiab thim rov qab qhov tseem ceeb thaum ntsuas lub diode.
Qhov thib ob, cov yam ntxwv ntawm qhov poob qis ntawm theem ob ntawm transistor yog qhov sib txawv, uas tuaj yeem ua rau muaj kev sib txawv hauv cov txiaj ntsig ntawm kev ntsuas qhov thib ob theem transistor siv lub pointer multimeter kuj qib piv rau kev siv digital multimeter los ntsuas qhov thib ob theem transistor. Piv txwv li, silicon thiab germanium tubes feem ntau muaj qhov ntsuas hluav taws xob poob ntawm {{{0}}}.3 volts thiab 0.6 volts, tab sis qee qhov tshwj xeeb theem ob transistors, xws li high-voltage diodes. , muaj ib tug loj conduction voltage poob thiab feem ntau yuav tsum tau mus txog 0.7 volts los yog ntau tshaj, thaum peb cov multimeter kuj cov qib voltage yog qis dua, Nws tsis muaj peev xwm ua lub diode, yog li nws yuav ua rau tus nqi kuj tshwm sim infinite thaum ntsuas.
Thaum ntsuas qhov zoo ntawm diode nrog lub digital multimeter, nws yog qhov zoo tshaj los xaiv lub diode iav. Lub diode iav ntawm ib qho digital multimeter feem ntau nyob ib ncig ntawm 2.6 volts, uas feem ntau yog ntau dua li tus nqi hluav taws xob rau pem hauv ntej ntawm diode, thiab diode tuaj yeem ua tau ob qho tib si.
Yog tias peb xav siv qhov kev tiv thaiv ntau yam los ntsuas seb puas muaj cov dej xau hauv lub diode, peb tuaj yeem xaiv cov digital multimeter resistance range. Ntawm no, qhov tshwm sim yuav tsum yog tus nqi tsis kam nyob rau hauv kev ntsuas rau pem hauv ntej, tus nqi tsis muaj kev tiv thaiv nyob rau hauv qhov kev ntsuas rov qab, thiab qhov tshwm sim ntawm tus pointer multimeter ntsuas yog tib yam. Yog tias pom tus nqi tiv thaiv nyob rau hauv qhov kev ntsuas rov qab, nws qhia tau hais tias lub diode yuav muaj cov dej xau hauv qhov rov qab. Hauv qhov no, peb yuav tsum siv cov cuab yeej tshwj xeeb los kuaj xyuas nws, Nws tsis yog qhov tseeb uas siv multimeter los ntsuas seb puas muaj cov pa tawm hauv lub diode no.
