Lub multimeter's resistance setting tsis tso saib tus nqi thaum ntsuas lub pem hauv ntej thiab rov qab tsis kam ntawm lub diode.
Vim li cas ho tsis tuaj yeem ntsuas diodes siv qhov ntsuas tsis kam?
Lub unidirectional conduction yam ntxwv ntawm lub diode yog conditional, uas yog, PN hlws ris ntawm lub diode yuav tsum tau rau pem hauv ntej biased ua ntej nws ua. Yog tias koj tsuas yog siv qhov kev teeb tsa kev tiv thaiv los ntsuas qhov tsis kam, lub diode nws tus kheej yuav tsis ua, yog li qhov ntsuas tsis tuaj yeem ntsuas. Lub diode teeb tsa ntawm lub multimeter yog tag nrho them, feem ntau yog hais txog 1.5-2.8V. Thaum ntsuas lub diode, qhov hluav taws xob tau ntxiv rau ob qhov kawg ntawm lub diode kom xa mus rau qhov kev tsis ncaj ncees ntawm PN kev sib tshuam. Tsuas yog tom qab ntawd kuv pom txog 0.7V ntawm lub multimeter. Lub zog poob ua pov thawj tias lub diode zoo. Qhov kev tiv thaiv ntawm kwv yees li 10K ntsuas los ntawm lub ntsuas ntsuas ntsuas tsis raug, thiab cov txiaj ntsig tau los ntawm kev ntsuas cov diodes sib txawv kuj txawv.
Yuav ua li cas ntsuas diodes nrog multimeter
Koj yuav tsum siv lub diode nplai ntawm lub multimeter los ntsuas lub diode. Tig lub multimeter mus rau qhov chaw diode, ntxig cov hlau kuaj liab mus rau hauv qhov zoo davhlau ya nyob twg, thiab ntxig cov hlau lead dub rau hauv qhov tsis zoo.
Siv cov hlau kuaj liab thiab cov xim dub ua rau kov ob lub electrodes ntawm diode hauv kev sim. Yog hais tias lub diode qhia tau hais tias qhov hluav taws xob poob ntawm txog 0.7V, nws txhais tau hais tias ib qho kawg ntawm cov hlau kuaj liab yog lub anode ntawm diode, thiab lwm qhov kawg yog cathode ntawm diode.
Hloov cov kev taw qhia ntawm lub diode nyob rau hauv kev sim. Yog tias tsis ntsuas tus nqi hluav taws xob, nws txhais tau hais tias cov hlau kuaj liab yog nyob rau hauv kev sib cuag nrog lub cathode ntawm lub diode thiab cov hlau lead dub yog nyob rau hauv kev sib cuag nrog lub anode ntawm lub diode.
Tom qab ob qho kev ntsuas saum toj no, qhov zoo thiab qhov tsis zoo ntawm cov diode tuaj yeem lees paub, thiab qhov zoo ntawm diode tuaj yeem lees paub.
Thaum lub digital multimeter nyob rau hauv hom tsis kam, qhov voltage ntawm ob qhov kev xeem coj mus rau qis qis, qis dua qhov kev xa hluav taws xob rau pem hauv ntej ntawm kwv yees li 0.6-0.7V ntawm silicon diodes zoo tib yam, thiab cov diodes yog nyob rau hauv lub xeev txiav tawm. Tus nqi kuj nyob rau hauv lub xeev txiav tawm yog loj heev, yog li thaum ntsuas lub diode nrog ib tug digital multimeter, txawm nws yog rau pem hauv ntej los yog rov qab, cov zaub tus nqi yuav overflow. Cov multimeter digital muaj qhov ntsuas diode ntau, uas yuav tsum tau siv los ntsuas qhov txuas mus tom ntej thiab thim rov qab ntawm lub diode.
Tsis tas li ntawd, lub diode yog ib qho tsis-linear tivthaiv, thiab tus nqi kuj tsis tas. Thaum lub pem hauv ntej conduction tsis kam ntawm lub diode yog ntsuas nrog cov kuj ntau yam ntawm ib tug pointer multimeter, nws yuav pom tau hais tias tus nqi kuj ntawm txawv chaw txawv heev. Yog li ntawd, nws yog ib qho tseem ceeb me ntsis los siv ib tug multimeter los ntsuas tus nqi kuj ntawm diode. Tsuav nws tuaj yeem ntsuas qhov kev coj mus rau pem hauv ntej thiab thim rov qab, lossis txheeb xyuas qhov zoo thiab qhov tsis zoo, thiab txiav txim siab seb puas muaj kev puas tsuaj lossis hlawv, tsis tas yuav tsum tau nyeem cov nqi tshwj xeeb. tsis kam.
Cov multimeter digital muaj qhov tshwj xeeb diode ntsuas qhov ntsuas rau kev ntsuas diodes. Yog tias koj yuav tsum siv qhov ntsuas tsis kam ntsuas, lub diode muaj qhov tsis kam ntawm ntau tshaj kaum ntawm K nyob rau hauv qhov kev taw qhia rov qab, yog li lub 'meter' yuav dhau 1. Muaj ntau pua ohms mus rau ob peb K nyob rau hauv cov kev taw qhia pem hauv ntej. Vim hais tias qhov hluav taws xob siv rau ob qhov kawg ntawm lub semiconductor diode yog qhov sib txawv, tus nqi kuj txawv. Yog li ntawd, thaum ntsuas diodes, feem ntau siv tshwj xeeb qhov chaw. Tus nqi thim rov qab feem ntau yog 1 (dhau), thiab tus nqi pem hauv ntej yog nyob nruab nrab ntawm 300 thiab 750 (qhov no yog qhov tseeb qhov poob qis). Feem ntau ntawm lawv yog nyob ib ncig ntawm 600 (silicon) thiab qis dua 500 (germanium) hlab. .
