Yuav Ua Li Cas Qhov Kev Ntsuas Ntsuas Cov Ntsiab Cai ntawm Megohmmeter thiab Professional Multimeter sib txawv
Lub megohmmeter, tseem hu ua lub rooj tuav, feem ntau yog siv los ntsuas qhov rwb thaiv tsev ntawm cov khoom siv hluav taws xob. Nws yog tsim los ntawm cov khoom xws li lub zog hluav taws xob ob npaug ntawm lub tshuab hluav taws xob AC thiab lub taub hau ntsuas. Thaum lub rooj co co co, ib qho hluav taws xob ncaj qha tam sim no yog generated. Thaum muaj qee qhov hluav taws xob siv rau cov khoom siv rwb thaiv tsev, qhov tsis tshua muaj zog tam sim no yuav ntws los ntawm nws, uas yog tsim los ntawm peb ntu: capacitive tam sim no, nqus tam sim no, thiab cov xau tam sim no. Qhov piv ntawm DC voltage generated los ntawm ib lub rooj co rau lub to tam sim no yog hu ua lub rwb thaiv tsev ntsuas ntsuas. Qhov kev sim ntawm kev siv lub rooj sib txhuam los xyuas seb cov khoom siv rwb thaiv tsev puas tsim nyog yog hu ua kev ntsuas kev tiv thaiv hluav taws xob. Nws tuaj yeem kuaj xyuas seb cov khoom siv rwb thaiv tsev puas ntub, puas, lossis hnub nyoog, yog li nrhiav pom cov khoom siv tsis raug. Qhov ntsuas hluav taws xob ntawm lub megohmmeter yog 250, 500, 1000, 2500V, thiab lwm yam, thiab qhov ntsuas ntau yog 500, 1000, 2000M Ω, thiab lwm yam.
Lub rwb thaiv tsev tiv thaiv tester tseem hu ua megohmmeter, megohmmeter, lossis megohmmeter. Lub rwb thaiv tsev ntsuas ntsuas feem ntau muaj peb ntu. Nws yog DC high voltage generator siv los tsim DC high voltage. Nws yog ib tug ntsuas Circuit Court. Qhov thib peb yog zaub.
(1) DC high voltage generator
Txhawm rau ntsuas kev tiv thaiv hluav taws xob, qhov hluav taws xob siab yuav tsum tau siv rau ntawm qhov ntsuas kawg, uas tau teev tseg hauv lub teb chaws tus qauv rau rwb thaiv tsev ntsuas ntsuas li 50V, 100V, 250V, 500V, 1000V, 2500V, 5000V
Feem ntau muaj peb txoj hauv kev tsim kom muaj DC voltage siab. Thawj hom yog tes cranked generator hom. Tam sim no, kwv yees li 80% ntawm cov megohmmeters tsim nyob rau hauv Suav teb siv txoj kev no (lub npe ntawm lub ntsuas ntsuas los ntawm). Qhov thib ob txoj kev yog txhawm rau nce qhov voltage los ntawm lub mains transformer thiab kho nws kom tau txais DC voltage siab. Cov txheej txheem feem ntau siv rau kev lag luam megohmmeter. Qhov thib peb txoj kev yog siv transistor oscillation los yog mob siab rau pulse width modulation circuits los tsim DC high voltage, uas yog feem ntau siv nyob rau hauv roj teeb hom thiab mains hom rwb thaiv tsev ntsuas ntsuas.
