Multimeter troubleshooting Circuit Court board luv Circuit Court faults
Multimeter diode cov ntaub ntawv los yog cov ntaub ntawv tiv thaiv tuaj yeem ntsuas Circuit Court board tsis ua haujlwm, yog tias cov ntaub ntawv diode nrog tus cwj mem los ntsuas cov ntsiab lus yuav tsum tau ntsuas, yog tias lub rooj tsav xwm Circuit Court luv luv, nws yuav nplhaib, yog tias qee qhov multimeter ntawm lub teeb, lossis cov ntaub ntawv tsis kam, nws yog luv luv, ces lub multimeter zaub yog xoom.
1. Multimeter, tseem hu ua multipurpose meter, multi-purpose meter, peb nrog lub 'meter', tsoos meter, thiab lwm yam, yog ib qho tseem ceeb ntsuas ntsuas rau lub hwj chim electronics thiab lwm yam departments, feem ntau yog ntsuas voltage, tam sim no thiab kuj raws li lub ntsiab lub hom phiaj. . Multimeter yog ib qho kev ua haujlwm ntau, ntau qhov ntsuas ntsuas, cov khoom siv dav dav tuaj yeem ntsuas DC tam sim no, DC voltage, AC tam sim no, AC voltage, tsis kam thiab qib suab, qee qhov kuj tuaj yeem ntsuas AC tam sim no, capacitance, inductance thiab semiconductor qee qhov tsis muaj. Lub multimeter muab faib ua pointer multimeter thiab digital multimeter raws li hom zaub.
2. DC voltage ntsuas: ua ntej tshaj, tus cwj mem dub rau hauv "com" qhov, tus cwj mem liab rau hauv "V Ω". Cov nqi tuaj yeem nyeem ncaj qha los ntawm cov zaub, yog tias cov zaub yog "1.", nws pom tau tias qhov ntau me me, ces peb yuav tsum tau nce qhov ntau thiab tom qab ntawd ntsuas cov khoom lag luam. Xaiv lub pob qhov rooj rau ntau qhov loj dua li qhov kwv yees (Ceeb toom: qhov tseem ceeb ntawm lub xov tooj yog qhov siab tshaj plaws, "V-" uas DC voltage iav, "V ~" uas AC voltage iav, "A" yog cov ntaub ntawv tam sim no) , ces txuas lub ntsuas mem rau lub hwj huam mov los yog lub hwj huam mov terminals; khaws kev sib cuag ruaj khov. Yog tias muaj "-" nyob rau sab laug ntawm tus nqi, nws qhia tau hais tias lub polarity ntawm tus cwj mem yog qhov sib txawv ntawm qhov tseeb ntawm lub hwj huam mov polarity, thiab tus cwj mem liab txuas nrog tus ncej tsis zoo nyob rau lub sijhawm no.
3. AC voltage ntsuas: tus cwj mem jack thiab DC voltage ntsuas, tab sis lub pob qhov rooj yuav tsum tau ua si rau AC cov ntaub ntawv "V ~" ntawm qhov yuav tsum tau muaj. AC voltage tsis zoo lossis tsis zoo, txoj kev ntsuas yog tib yam li yav dhau los. Txawm hais tias ntsuas AC lossis DC voltage, peb yuav tsum xyuam xim rau kev nyab xeeb ntawm tus kheej, tsis txhob kov cov hlau ntawm tus cwj mem nrog koj txhais tes.
4. Kev ntsuas kev tiv thaiv: Teem qhov hloov pauv mus rau qhov tsim nyog ntawm Ω, ntxig tus cwj mem liab rau hauv V / Ω qhov, thiab tus cwj mem dub rau hauv lub qhov COM. Yog tias qhov ntsuas qhov ntsuas tsis zoo tshaj qhov siab tshaj plaws ntawm qhov kev xaiv, lub multimeter yuav tso saib .1. Thaum ntsuas kev tiv thaiv, tus cwj mem liab yog qhov zoo thiab tus cwj mem dub yog qhov tsis zoo, uas yog qhov txawv ntawm tus pointer multimeter. Yog li ntawd, thaum ntsuas transistors, electrolytic capacitors thiab lwm yam khoom nrog polarity, koj yuav tsum tau them sai sai rau lub polarity ntawm tus cwj mem.
5. Kev ntsuas tam sim no nrog ib lub multimeter: ua ntej ntawm tag nrho cov, xaiv qhov ntau yam, multimeter DC tam sim no cov ntaub ntawv sau npe "mA" muaj 1mA, 1omA, 100mA peb ntau yam. Xaiv qhov ntau, yuav tsum ua raws li qhov loj ntawm qhov tam sim no hauv Circuit Court. Tom qab ntawd lub multimeter yuav tsum tau txuas nrog nyob rau hauv series nrog Circuit Court nyob rau hauv kev sim. Qhov sib thooj ntawm lub voj voog yuav tsum raug txiav, thiab tom qab ntawd tus cwj mem multimeter yuav tsum txuas nrog rau ob qho kawg ntawm qhov tawg. Thaum kawg, kev nyeem ntawv kom raug, DC cov ntaub ntawv teev tam sim no tseem yog qhov thib ob, xws li xaiv cov ntaub ntawv 100mA, muaj nyob rau hauv peb kab ntawm cov duab, kev nyeem ntawv tuaj yeem muab faib ua 10.
6. Kev ntsuas ntawm capacitance nrog lub multimeter: qee qhov digital multimeter muaj lub luag haujlwm ntawm kev ntsuas capacitance, qhov ntau yog muab faib ua 2000p, 20n, 200n, 2μ thiab 20μ tsib cov ntaub ntawv. Kev ntsuas tuaj yeem tso tawm lub peev xwm ntawm ob tus pins ncaj qha rau hauv lub rooj ntawm Cx jack, xaiv qhov tsim nyog tuaj yeem nyeem tom qab cov ntaub ntawv tso tawm.
