Ib qho kev paub me me hauv kev nrhiav cov khoom siv hluav taws xob nrawm nrawm nrog lub tshuab multimeter
Raws li paub zoo, kev xau ntawm cov khoom siv hluav taws xob tuaj yeem tshwm sim txhua lub sijhawm. Yuav ua li cas txhawm rau txhawm rau lub sijhawm? Nov yog ob peb txoj hauv kev yooj yim uas koj yuav xav muab rau lawv sim.
Ua ntej, ntsuas qhov xau hluav taws xob nrog lub multimeter. Muab qhov multimeter hloov ntawm AC voltage ntsuas ntau, feem ntau ntawm AC voltage 250V ntau. Tom qab ntawd, ntxig qhov kev sojntsuam dub rau hauv cov av ze ntawm cov khoom siv kuaj thiab cov tshuaj ntsuam xyuas liab rau hauv cov hlau casing ntawm cov khoom siv. Hauv qhov no, saib cov ntawv nyeem ntawm lub multimeter. Yog tias rab koob tsis txav mus, koj tuaj yeem maj mam hloov nws mus rau lub iav qis kom txog thaum cov ntaub ntawv tshwj xeeb tau qhia, uas yog qhov hluav taws xob xau ntawm lub cuab yeej. Yog tias tseem tsis muaj qhov qhia tau tias thaum qhov kev sojntsuam nyob rau hauv qhov qis, nws txhais tau hais tias tsis muaj qhov tshwm sim los ntawm lub cuab yeej.
* Thib ob, siv tus cwj mem kuaj xyuas seb puas muaj hluav taws xob xau. Tus neeg soj ntsuam tuav tus cwj mem xeem thiab txuas ncaj qha mus rau cov hlau casing ntawm cov khoom siv hluav taws xob. Thaum lub raj neon nyob rau hauv qhov ntsuas mem hluav taws teeb, nws qhia tau hais tias cov cuab yeej muaj to thiab qhov hluav taws xob xau siab. Thaum lub raj neon tsis teeb, nws tsis qhia tias tsis muaj qhov tshwm sim ntawm cov khoom siv. Tej zaum nws yuav yog vim lub neon raj tsis tuaj yeem teeb pom kev vim qhov hluav taws xob tsis tshua muaj hluav taws xob, lossis tej zaum yuav tsis muaj hluav taws xob to.
Thib peb, thaum tsis muaj multimeter lossis ntsuas cwj mem, koj tuaj yeem kov cov hlau casing ntawm cov khoom siv hluav taws xob nrog sab nraub qaum ntawm koj txhais tes. Thaum muaj tes loog lossis hluav taws xob poob siab, nws qhia tau tias lub cuab yeej muaj hluav taws xob to. Yuav tsum ceev faj thaum muaj kev xav ntawm hluav taws xob poob siab, vim nws qhia tau hais tias qhov hluav taws xob xau yog qhov siab heev. Nres lub tshuab rau kev tshuaj xyuas thiab tshuaj xyuas qhov ua rau, tshem tawm qhov ua txhaum ua ntej siv, txwv tsis pub muaj hluav taws xob poob siab yuav tshwm sim.
