Ob txoj hauv kev zoo los siv digital multimeter
Txoj kev no tuaj yeem siv los xyuas seb cov hlua hluav taws xob ntawm cov khoom siv hauv tsev puas puas lawm, thiab nws tuaj yeem tshawb xyuas qhov tawg ntawm cov cua sov hlau hauv cov pam hluav taws xob, hluav taws xob hlau thiab lwm yam khoom siv hauv tsev.
1. Txiav txim siab qhov chaw ntawm qhov tawg ntawm cov hlau [Phase Nuclear Phase Meter]
Txoj kev: Txuas ib kawg ntawm cov tub ntxhais uas tawg tawg rau cov hlau nyob ntawm 220V AC fais fab mov, thiab tawm mus rau lwm qhov kawg. Teem lub digital multimeter rau 2V txoj haujlwm. Pib los ntawm qhov kawg ntawm cov hlau nyob, txav cov hlau kuaj liab raws li cov txheej txheem insulated ntawm cov hlau. Tus nqi tso tawm voltage yuav tsum dhia nce thiab nqis ntawm ob peb feem kaum ntawm ib lub volt. Thaum cov hlau lead kuaj liab txav mus rau ib qho chaw, qhov hluav taws xob tam sim ntawd poob rau ob peb 0.0 volts, qhia tias qhov no yuav tsum yog qhov chaw ntawm cov tub ntxhais tawg.
Transformation ratio tester chaw tsim tshuaj paus qhia ob qho kev siv zoo ntawm digital multimeter [DC high voltage generator]
Hauv AC 20V iav ntawm digital multimeter, kev nyeem ntawv ntawm ob qhov ntsuas yog 6.01V thiab 0.4V raws. Tom qab ntawd lub 6.01V davhlau ya nyob twg yog "hluav taws" xaim ntawm lub hwj huam mov, thiab 0.4V yog qhov hloov.
Vim lub siab rhiab heev ntawm AC block ntawm digital multimeter, nws kuj tseem tuaj yeem txiav txim siab cov hlau nyob hauv qhov tsis tas kov cov xov hlau sab hauv thiab tsuas yog kov cov hlua sab nraud ntawm ob lub zog xaim. Txoj kev yog tib yam li saum toj no. Txij li thaum qhov kawg ntawm cov hlau lead tsis kov cov tooj liab hlau sab hauv, qhov hluav taws xob induced yog me dua, yog li yuav tsum tau xaiv ntau yam me me.
2. Sib txawv ntawm "zero" nyiaj thiab "hluav taws" nyiaj ntawm mains hluav taws xob
Teem lub multimeter rau AC 20V, tshem tawm cov cwj mem dub, tuav lub pas ntsuas hluav taws xob ntawm tus cwj mem liab, thiab kov ob lub qhov hauv lub qhov hluav taws xob nrog lub hau ntawm tus cwj mem. Ib qho nrog tus nqi loj dua yog "kub" xaim, thiab ib qho uas muaj tus lej loj dua yog "kub" xaim. Lub qhov (socket) me me yog qhov "nruab nrab" hlau.
