Yuav ua li cas kom sai thiab meej nrhiav DC fais fab mov tsis raug siv lub Multimeter
Muaj ntau yam tshwm sim ntawm DC fais fab mov tsis ua haujlwm, xws li cov khoom siv hluav taws xob tsis ruaj khov, tsis muaj qhov tso tawm, kev tiv thaiv overload, thiab lwm yam. Tau ntsib nrog cov kev nyuaj no thiab puas tau - hloov qhov tshwm sim txhaum cai, Fluke multimeter tuaj yeem pab peb nrhiav qhov teeb meem sai sai los ntawm nws qhov kev ntsuas qhov tseeb.
Kev ua haujlwm ntawm DC fais fab mov pib nrog lub tswv yim ntawm AC lub zog. Yog li ntawd, thaum lub DC fais fab mov tsis ua hauj lwm, thawj qhov yuav tsum tau xyuas yog seb qhov AC input voltage yog qhov qub. Siv lub Fluke multimeter, peb tuaj yeem hloov qhov kev ntsuas mus rau AC voltage hom, thiab sai sai nyeem cov input voltage tus nqi los ntawm kev hu rau "L" (nyob hlau) thiab "N" (nruab nrab xaim) terminals ntawm lub hwj chim mov nrog cov dub thiab liab probes, ntsig txog. Yog tias qhov ntsuas tus nqi tsis sib xws rau tus nqi nominal ntawm cov khoom siv hluav taws xob, lossis muaj qhov hloov pauv loj, ces qhov teeb meem zoo li yuav pw hauv cov khoom siv hluav taws xob lossis cov kab hluav taws xob.
Tom qab paub meej tias AC input voltage yog qhov qub, cov kauj ruam tom ntej yog txhawm rau txheeb xyuas qhov hluav taws xob DC. Fluke multimeter kuj txhawb ntsuas DC voltage. Peb tsuas yog yuav tsum tau hloov qhov ntsuas ntsuas mus rau DC voltage hom, thiab kov qhov kev sojntsuam mus rau qhov chaw tso zis ntawm lub zog hluav taws xob raws li qhov zoo thiab qhov tsis zoo polarity los nyeem DC cov zis voltage tus nqi. Yog tias qhov tso zis hluav taws xob tsis sib haum nrog tus nqi hluav taws xob tau teev tseg los ntawm cov chaw tsim khoom, lossis muaj qhov hloov pauv tsis zoo lossis qhov tshwm sim tsis ruaj khov, nws tuaj yeem raug txiav txim ua ntej tias muaj teeb meem hauv DC fais fab mov, xws li lim capacitor tsis ua haujlwm, voltage regulator Circuit Court tsis ua haujlwm, thiab lwm yam.
Thaum Fluke multimeter kuaj pom qhov txawv txav DC tso zis voltage tab sis tsis tuaj yeem txiav txim siab ntxiv qhov yuam kev, peb yuav tsum siv cov cuab yeej tshaj lij xws li oscilloscopes rau hauv - tshawb xyuas qhov tob. Oscilloscopes tuaj yeem tso saib qhov tseeb- lub sijhawm hloov pauv ntawm qhov hluav taws xob dhau sijhawm, pab peb ntes cov xwm txheej tsis ntev los no thiab cov qauv tsis sib xws uas tsis tuaj yeem kuaj pom los ntawm ntau lub ntsuas. Los ntawm kev soj ntsuam lub waveform ntawm oscilloscope, peb tuaj yeem muaj kev nkag siab ntau dua ntawm kev ua haujlwm ntawm lub zog hluav taws xob, yog li nrhiav qhov tseeb ntawm qhov txhaum.
