Puas yog Voltage tester cwj mem qhia qhov txawv ntawm kev hloov tam sim no thiab ncaj qha tam sim no?
Txoj kev xav, nws muaj peev xwm ua tau, tab sis tus cwj mem kev lag luam dav dav tsis muaj txoj haujlwm no. Vim nws tsis tsim nyog. Tab sis yog tias qhov kev kawm muaj qhov xav tau no, koj tuaj yeem siv ib qho multimeter zoo tib yam kom ua tiav txoj haujlwm no. Txoj kev tshwj xeeb yog - lub multimeter yog tig mus rau lub iav los ntsuas qhov voltage, thiab nws siab npaum li qhov ua tau. Yog tias lub iav siab dhau lawm, kev nyeem ntawv yuav tsis raug, thiab yog tias lub iav qis dhau, nws yooj yim kom tau txais hluav taws xob poob siab. Tom qab ntawd, tuav lub taub ntawm cov hlau lead nrog ib txhais tes, thiab lwm qhov kev sim cov hlau lead kov qhov ntsuas qhov ntsuas. Yog tias nws yog DC, koj tuaj yeem tshawb xyuas qhov voltage nrog DC iav, thiab tus nqi tshwj xeeb tsuas yog xa mus rau. Tab sis qhov polarity tseem tuaj yeem kuaj pom. Yog tias nws yog kev sib txuas lus, nws tsuas tuaj yeem tshawb pom nrog cov ntaub ntawv AC. Tau kawg, feem ntau, AC sib xyaw nrog DC, thiab ob lub zog tuaj yeem kuaj pom. Qhov no kuj yog vim li cas tsis muaj manufacturers tsim DC xeem cwj mem.
