Multimeter ntsuas ntawm cov khoom siv hluav taws xob enclosure to method
Multimeter ntsuas ntawm cov khoom siv hluav taws xob lub plhaub xau txoj kev.
Cov khoom siv hluav taws xob hlau casing yog qhov rwb thaiv tsev zoo, thiab kev txhim khu kev qha hauv av tsis tuaj yeem tawm, tab sis qee zaum cov khoom siv rwb thaiv tsev tsis zoo los yog hauv av tsis tuaj yeem ntseeg tau (feem ntau hauv cov chaw tsim khoom yog cov khoom siv hauv av yog txuas ncaj qha rau cov hlau casing txau nrog cov yas. hmoov), lub sij hawm no cov hlau casing yuav raug them, yog li peb siv ib tug digital multimeter AC voltage cov ntaub ntawv los ntsuas qhov voltage ntawm cov hlau casing thiab hauv av kom paub seb cov khoom to.
Kev ntsuas, cov digital multimeter dialed rau AC 200V cov ntaub ntawv, nrog tus cwj mem liab hu rau cov khoom siv casing, tus cwj mem dub txuas nrog lub ntiaj teb, lub sijhawm no yog lub multimeter qhia ntau tshaj li ob peb kaum ntawm qhov hluav taws xob, qhia tias cov khoom siv rwb thaiv tsev yog tsis zoo heev, los yog grounding tsis txhim khu kev qha. Yog tias qhov ntsuas tau pom tias qhov hluav taws xob nce mus txog ib puas thiab kaum volts, lub sij hawm no txhais tes kov cov hlau casing ntawm cov cuab yeej feem ntau yuav muaj kev xav ntawm hluav taws xob poob siab. Ntawm no peb tuaj yeem ntsuas qhov loj ntawm cov xau tam sim no, lub tshuab hluav taws xob multimeter hu rau AC 2mA (lossis 20mA) iav, nrog cov cwj mem liab hu rau cov khoom vaj tse, cwj mem dub rau lub ntiaj teb, tam sim no tso tawm tam sim no uas yog cov xau tam sim no, qhov loj ntawm uas feem ntau yog nyob rau theem μA.
