Fault Diagnosis thiab Analysis ntawm Digital Multimeters
Raws li qhov kub thiab txias maj mam nce, nag los nag thiab huab cua ntub kuj tseem nce ntxiv, thiab muaj ntau cov lus ceeb toom ntawm kev ua txhaum los ntawm hluav taws xob to. Kuv ntseeg tias cov phooj ywg tau xav ntau heev txog kev nrhiav qhov ua rau hluav taws xob to. Qhov tseeb, peb tuaj yeem yooj yim txheeb xyuas qhov ua rau hluav taws xob los ntawm kev siv yam peb muaj nyob hauv peb txhais tes.
Nrhiav tsis raug thiab tsom xam
Ua ntej, nug txog cov tsos mob tsis raug thiab pom tseeb ntawm tus neeg siv uas qhia txog kev kho; Tom ntej no, saib qhov chaw kom pom tseeb
cov ntsiab lus txhaum, thiab tom qab ntawd mus rau kauj ruam tom ntej ntawm kev tshuaj xyuas.
1. Ua ntej, tshem tawm qhov hloov pauv tseem ceeb ntawm tus neeg siv cov kab nkag thiab tua tag nrho cov khoom siv hluav taws xob ntawm tus neeg siv, xws li tshem tawm lub tub yees plug, disconnecting lub twj tso kua mis hloov, thiab lwm yam.
2. Muab cov iav ntawm cov digital multimeter nyob rau hauv 200M ntau yam ntawm ohm ntau yam, nrog rau ib qho kev sojntsuam muab tso rau ntawm ib qho ntawm ob qhov tso zis kab ntawm sab load thiab lwm qhov kev sojntsuam kov cov phab ntsa, uas tuaj yeem kov cov xaim hauv av lossis ib ntus hauv av. Tom qab tus naj npawb tso tawm ntawm lub multimeter stabilizes, cov nqi hluav taws xob tiv thaiv ntawm lub ntsiab Circuit Court raug nyeem tawm. Yog tias tus nqi hluav taws xob tiv thaiv tsawg dua 0.5 megohms, ces muaj teeb meem nrog lub ntsiab Circuit Court. Yog hais tias lub rwb thaiv tsev tsis kam yog siab tshaj 0.5 megohms, nws tuaj yeem txiav txim siab tias muaj teeb meem nrog lub ntsiab Circuit Court. Ntsuas lwm cov hlau uas siv tib txoj kev thiab xyuas tus nqi kom pom tias muaj teeb meem nrog lub ntsiab Circuit Court.
3. Tshawb xyuas qhov kev tiv thaiv kev tiv thaiv ntawm cov ceg ntoo thiab ntau yam khoom siv hluav taws xob, thiab siv tib txoj kev los xyuas lawv ib qho los ntawm ib qho kom txog thaum pom qhov txhaum.
Kev ceev faj ua haujlwm
Thaum siv lub multimeter nyob rau hauv 200M ohm ntau yam, ceev faj tsis txhob kov cov hlau ntawm qhov kev sojntsuam nrog koj txhais tes thaum ntsuas, vim qhov no yuav ua rau kev nyeem ntawv tsis raug.
2. Thaum ntsuas ntau yam khoom siv hluav taws xob, xyuam xim rau kev tso tawm ua ntej txhawm rau tiv thaiv cov khoom siv hluav taws xob los ntawm cov neeg raug mob.
Txoj kev no yog ib txoj hauv kev zoo los nrhiav qhov chaw txhaum hauv lub xeev tsis muaj hluav taws xob. Txoj kev no kuj tseem siv tau rau kev tshawb nrhiav rau cov neeg siv hluav taws xob thiab lub Hoobkas xau, tab sis thaum lub sij hawm tshawb nrhiav, tsis yog tsuas yog yuav tsum tau txiav lub hwj huam mov, tab sis kuj yuav tsum tau txiav cov kab nruab nrab kom tsis txhob muaj hluav taws xob poob.
