Dab tsi yog lub ntsiab lus ntawm digital multimeter diode tso saib ntau dua 1
Thaum ntsuas diodes siv lub diode ntau ntawm cov multimeter, yog tias lub diode zoo li qub, cov multimeter digital qhia "1" qhia txog qhov rov qab siab ntawm diode. Rau silicon diodes, nws qhia ib tug pem hauv ntej conduction voltage ntawm 0.5V-0.7V. Rau cov raj germanium, ib qho hluav taws xob txuas mus tom ntej ntawm ib puag ncig 0.2-0.3V tau tshwm sim. Thaum coj mus rau pem hauv ntej, cov hlau lead liab txuas nrog rau tus ncej zoo ntawm lub diode, thaum cov hlau lead dub txuas nrog cov ncej tsis zoo ntawm lub diode. Sib npaug rau "0" qhia txog qhov luv luv, qhia tias lub diode ua haujlwm tsis raug. Hauv txoj kev xav, qhov loj dua qhov rov qab tsis kam ntawm diode, qhov zoo dua, thaum me me rau pem hauv ntej tsis kam, qhov zoo dua.
Multimeters, tseem hu ua multiplexers, multimeters, triple meters, thiab multimeters, yog qhov tseem ceeb ntsuas ntsuas hauv hluav taws xob hluav taws xob thiab lwm lub tuam tsev, feem ntau tsom rau ntsuas qhov ntsuas hluav taws xob, tam sim no, thiab tsis kam. Multimeters muab faib ua pointer multimeter thiab digital multimeter raws li lawv hom zaub. Nws yog multifunctional thiab ntau yam ntsuas ntsuas. Feem ntau, multimeter tuaj yeem ntsuas DC tam sim no, DC voltage, AC tam sim no, AC voltage, tsis kam, suab qib, thiab lwm yam. Qee qhov kuj tuaj yeem ntsuas AC tam sim no, capacitance, inductance, thiab qee qhov tsis sib xws ntawm semiconductors (xws li ) thiab lwm yam.
Thaum teeb tsa digital multimeter rau diode ntau los ntsuas diodes, qee cov ntaub ntawv yuav tshwm sim. Cov ntaub ntawv no txhais li cas
Diode qib ntsuas yog siv los ntsuas qhov ntsuas diode pem hauv ntej thiab thim rov qab ntawm lub diode. Thaum lub multimeter nyob rau hauv lub diode, qhov qhib Circuit Court voltage ntawm V Ω qhov thiab COM qhov yog hais txog 2.8V. Qhov voltage no yog siv rau ob qhov kawg ntawm lub diode. Yog hais tias nws yog nyob rau hauv pem hauv ntej kev taw qhia, lub diode yuav coj thiab tso saib ib txheej ntawm qhov tseem ceeb, qhia tias qhov no yog tus nqi pem hauv ntej diode. Yog hais tias nws yog nyob rau hauv lub rov qab kev taw qhia, lub multimeter yuav tso saib "1" infinity, qhia tias lub diode tsis ua nyob rau hauv lub rov qab kev taw qhia. Yog hais tias lub multimeter qhia 000 nyob rau hauv ob qho tib si kev ntsuas, nws qhia diode breakdown. Yog hais tias lub diode qhia "1" nyob rau hauv ob qho tib si kev ntsuas, nws qhia tau hais tias ib tug qhib Circuit Court.
Vim li cas cov digital multimeter tso saib tus nqi zoo ntawm 410 thaum kuaj diodes hauv diode ntau
Thaum kuaj cov diode ntau ntawm digital multimeter, qee zaum lub ntsuas ntsuas pom qhov zoo ntawm 410, thiab muaj peb qhov xwm txheej:
Vim tias cov khoom siv hluav taws xob ntau dhau ntawm lawv tus kheej, feem ntau cov raj silicon diode muaj qhov hluav taws xob poob ntawm ib puag ncig {{0}}.6V, thaum germanium diodes muaj qhov hluav taws xob poob ntawm ib puag ncig 0.2V. Txawm li cas los xij, nws tsis tuaj yeem txiav txim siab tias qee lub raj diode muaj qhov hluav taws xob poob ntawm ib ncig ntawm 0.4V (piv txwv li 410).
Lub diode ntsuas tau raug puas lawm (nrog muag muag). Qee lub diodes tsis raug puas tsuaj tag nrho tom qab ib qho kev puas tsuaj, thiab thaum ntsuas nrog lub tshuab digital multimeter, tus nqi tsis paub meej.
Lub roj teeb ntawm digital multimeter tuag. Thaum ntsuas qhov zoo voltage poob deviation ntawm lub diode, nws yog ib qho tsim nyog los xyuas seb lub meter roj teeb puas zoo li qub.
