Kev soj ntsuam ntawm txoj kev ntsuas qhov ntsuas tus nqi ntawm lub multimeter:
Muaj ntau ntau yam khoom siv hauv kev lag luam, txhua qhov yuav tsum muaj kev siv sib txawv thaum siv. Raws li ib tug multimeter feem ntau siv nyob rau hauv kev lag luam, tib neeg kuj yuav tsum tau them sai sai rau thaum siv nws. Lub ntsiab lus tseem ceeb ntawm tsab xov xwm no yog ua tib zoo saib xyuas cov teeb meem uas yuav tsum tau them sai sai rau thaum siv multimeter los ntsuas cov nqi ntawm qhov tsis kam. Cia peb saib.
Multimeters tau muab faib ua cov multimeters thiab digital multimeters. Traditional multimeters yog hom electromagnetic deflection nrog pointers. Kev hloov kho tshuab xoom yog xav tau ua ntej txhua qhov kev siv. Nws yog cumbersome siv thiab kev nyeem ntawv ntawm cov zauv qhia yog subjective thiab tsis raug. Tsis tshua muaj tam sim no. Siv; thiab digital multimeters tuaj yeem tso saib cov lej ncaj qha yam tsis tau soj ntsuam qhov ntsuas rau kev nyeem ntawv, cov txiaj ntsig tau raug ntau dua, thiab tam sim no tau siv dav.
Kev ceev faj thaum ntsuas qhov tsis kam nrog multimeter:
(1) Ua ntej siv lub multimeter, "kev hloov kho tshuab xoom" yuav tsum tau ua ua ntej, uas yog, thaum tsis muaj hluav taws xob los ntsuas, ua tus pointer ntawm multimeter taw tes rau txoj hauj lwm ntawm xoom voltage lossis xoom tam sim no.
(2) Nyob rau hauv tus txheej txheem ntawm kev siv lub multimeter, tsis txhob kov cov hlau ib feem ntawm lub xeem cwj mem nrog koj ob txhais tes, yog li ntawm ib sab, nws muaj peev xwm xyuas kom meej qhov tseeb ntawm kev ntsuas, thiab ntawm qhov tod tes, nws kuj muaj peev xwm xyuas kom meej. tus kheej kev nyab xeeb.
(3) Thaum ntsuas qee qhov hluav taws xob, koj tsis tuaj yeem hloov lub zog thaum ntsuas, tshwj xeeb tshaj yog thaum ntsuas qhov hluav taws xob siab lossis siab tam sim no, koj yuav tsum tau saib xyuas ntau dua. Txwv tsis pub, lub multimeter yuav raug puas tsuaj. Yog tias koj xav tau hloov lub zog, koj yuav tsum txiav tawm qhov kev xeem ua ntej, thiab tom qab ntawd mus ntsuas tom qab hloov lub zog.
(4) Thaum siv multimeter, nws yuav tsum tau muab tso rau hauv kab rov tav kom tsis txhob ua yuam kev. Nyob rau tib lub sijhawm, xyuam xim kom tsis txhob muaj kev cuam tshuam ntawm sab nraud magnetic teb ntawm multimeter.
(5) Tom qab siv multimeter, qhov hloov pauv yuav tsum muab tso rau hauv qhov siab tshaj plaws ntawm AC voltage. Yog tias nws tsis siv sijhawm ntev, lub roj teeb hauv lub tshuab hluav taws xob yuav tsum tau muab tshem tawm los tiv thaiv lub roj teeb ntawm corroding lwm yam khoom hauv lub ntsuas.
Multimeter yog ib qho khoom siv ntau yam, ntau qhov ntsuas ntsuas. Nws tuaj yeem ntsuas qhov tsis kam ntawm qhov khoom yuav ntsuas, tab sis kuj ntsuas qhov DC voltage. Raws li cov cuab yeej ntsuas tseem ceeb hauv kev lag luam, tsuas yog los ntawm kev paub txog cov ntsiab lus uas yuav tsum tau them nyiaj rau thaum ntsuas nws tuaj yeem ua nws lub luag haujlwm zoo dua.
Yuav ua li cas mus ntes tus photoresistor?
1. Npog lub qhov rais xaim hluav taws xob ntawm lub photoresistor nrog ib daim ntawv dub. Nyob rau lub sijhawm no, tus pointer ntawm lub multimeter tseem tseem tsis hloov pauv, thiab tus nqi kuj nyob ze rau infinity. Qhov loj dua tus nqi, qhov ua tau zoo ntawm photoresistor. Yog tias tus nqi no tsawg heev los yog ze rau xoom, nws txhais tau hais tias lub photoresistor tau raug hlawv los ntawm kev puas tsuaj thiab siv tsis tau lawm.
2. Teem lub teeb ci ntawm lub qhov rais xaim hluav taws xob ntawm photoresistor. Lub sijhawm no, tus pointer ntawm multimeter yuav tsum muaj lub viav vias loj, thiab tus nqi kuj yuav raug txo kom tsawg. Tus nqi me dua, qhov ua tau zoo ntawm photoresistor. Yog tias tus nqi no loj heev lossis tsis muaj qhov kawg, nws qhia tau hais tias lub kaw lus qhib sab hauv ntawm photoresistor puas thiab siv tsis tau lawm.
3. Teem lub qhov rais xaim hluav taws xob ntawm lub photoresistor nrog qhov teeb meem teeb meem, thiab siv ib daim ntawv dub me me los co rau sab sauv ntawm lub qhov rais tiv thaiv lub teeb ntawm lub photoresistor kom nws tau txais lub teeb tsis tu ncua. Lub sijhawm no, tus pointer ntawm multimeter yuav tsum viav vias sab laug thiab sab xis nrog kev co ntawm daim ntawv dub. Yog hais tias tus pointer ntawm lub multimeter ib txwm nres ntawm ib qho chaw thiab tsis viav vias nrog lub co ntawm daim ntawv, nws txhais tau hais tias cov photosensitive khoom ntawm lub photoresistor puas lawm.
