Siv multimeter los ntsuas qhov polarity ntawm qhov zoo thiab qhov tsis zoo ntawm lub diode thiab seb nws puas zoo lossis phem
Nrog kev pab los ntawm ib tug multimeter los ntsuas qhov tsis kam los yog on-off xeem iav, koj yuav tau yooj yim nrhiav tau tawm lub polarity ntawm lub zoo thiab tsis zoo ncej ntawm lub diode thiab roughly ntsuas qhov zoo ntawm lub diode.
Diode zoo thiab tsis zoo
Feem ntau, cov diodes ncaj qha qhia cov ncej zoo thiab tsis zoo. Thaum koj pom cov seem ntawm cov kab dawb ntawm lub plhaub raj, nws yog tus ncej tsis zoo. Los yog luv dua ntawm cov hlau yog cov ncej tsis zoo. Tab sis yuav ua li cas yog tias koj tsis muaj cov yam ntxwv no?
Lub multimeter yog ib qho cuab yeej uas cov kws hluav taws xob muaj nyob hauv lawv txhais tes. Thaum siv lub ohm ntau yam (kev ntsuas tsis kam) ntawm lub multimeter los ntsuas qhov zoo thiab qhov tsis zoo ntawm lub diode, vim hais tias lub multimeter txuas nrog lub roj teeb, nws yog ib qho tsim nyog yuav tsum tau them sai sai rau qhov kev sib txuas ntawm lub davhlau ya nyob twg uas cim "-" ntawm lub tshuab hluav taws xob. multimeter rooj. Cov kev ntsuam xyuas dub txuas nrog; qhov kev xeem liab coj ntawm cov terminals cim nrog "ntxiv" ntawm rooj plaub yog txuas nrog. Cov tam sim no ntws tawm ntawm cov hlau kuaj liab thiab ntws rov qab los ntawm cov hlau lead kuaj dub. Tsis tas li ntawd, lub ohm ntau ntawm Rx1000 yuav tsum tau siv rau kev ntsuas, vim tias tam sim no ntawm Rx1 cov ntaub ntawv loj heev, thiab qhov hluav taws xob ntawm Rx10K cov ntaub ntawv siab dhau lawm, uas yooj yim rau kev puas tsuaj rau diode, yog li nws tsis tsim nyog siv.
Txoj kev xeem tshwj xeeb yog qhia hauv daim duab ntawm sab xis. Txuas ob qhov kev xeem coj ntawm multimeter mus rau ob tus pins ntawm lub diode feem. Lub pem hauv ntej tsis kam ntawm diode yog heev me me, feem ntau kaum ntawm ohms mus rau pua pua ohms, thaum lub rov qab kuj yog heev loj, feem ntau kaum ntawm kilohms mus rau pua pua ntawm kilohms. Yog hais tias nyob rau hauv ob qhov kev ntsuam xyuas nyob rau hauv daim duab, qhov kev ntsuam xyuas ntawm sab xis qhia ib tug me me tsis kam, thiab qhov kev ntsuam xyuas ntawm sab laug qhia tau hais tias ib tug loj kuj, nws muaj peev xwm yuav xaus lus tias tus pin txuas nrog lub liab test cwj mem nyob rau sab xis yog tus ncej zoo. ntawm lub diode, thiab lwm tus pin yog tus ncej tsis zoo.
Qee cov niaj hnub digital multimeters yuav muaj lub iav los txiav txim seb lub diode puas zoo lossis phem (rau-tawm iav). Teem lub multimeter ntawm lub iav no rau kev ntsuas. Yog tias muaj kev nyeem ntawv, tus cwj mem liab kuaj pom zoo. Yog tias tsis muaj kev nyeem ntawv lossis "1" tshwm sim, nws yog xim dub. Cov tshuaj ntsuam xyuas yog qhov zoo.
Diode kev txiav txim zoo los yog phem
Nws tseem raug txiav txim los ntawm txoj kev ntsuas saum toj no siv cov ntaub ntawv tiv thaiv ntawm multimeter. Yog tias muaj qhov sib txawv loj ntawm qhov ntsuas rau pem hauv ntej thiab rov qab ua haujlwm, nws txhais tau hais tias lub unidirectional conductivity ntawm diode yog qhov zoo; Tsis zoo diodes nrog cov teeb meem zoo.
