Kev xaiv megohmmeter: Qhov loj megohmmeter yog qhov tsim nyog yuav?
Thaum xaiv qhov loj megger, nws yuav tsum tau txiav txim siab raws li qhov ntsuas hluav taws xob ntawm cov khoom siv hluav taws xob.
Yog tias tus kws kho hluav taws xob koom nrog kev ua haujlwm qis, nws feem ntau xaiv lub megohmmeter ntawm 250V-500V. Yog tias tus kws kho hluav taws xob koom nrog kev ua haujlwm siab, nws tuaj yeem xaiv lub megohmmeter ntawm 1000V-5000V.
Thaum ntsuas 250V cov khoom siv hluav taws xob, koj tuaj yeem siv 1000V lossis 5000V megohmmeter los ntsuas nws cov nqi hluav taws xob tiv thaiv, uas yuav ua rau tawg. Nqe lus piav qhia: Tus nqi tseem ceeb kuj tsim nyog.
Yog li ntawd, thaum xaiv ib lub megohmmeter, koj yuav tsum tau txiav txim siab qhov ntau ntawm lub megohmmeter raws li qhov voltage tsis kam ntawm cov khoom siv hluav taws xob hauv kev sim. Xaiv ib lub 500 megohmmeter rau voltages hauv qab 500V, thiab ib tug 1000-2500 megohmmeter rau voltages saum 500V.
Megohmmeter xaiv cov kev cai:
Xaiv lub megohmmeter raws li cov khoom yuav ntsuas thiab ntsuas qhov ua haujlwm voltage. Megohmmeters raug cais raws li cov zis voltage. Feem ntau siv specifications muaj xws li 250V, 500V, 1000V, 2500V, 5000V thiab lwm yam qauv.
Thaum qhov ua haujlwm voltage ntawm cov khoom raug ntsuas qis, koj tuaj yeem xaiv 250V megohmmeter. Feem ntau ntawm AC fais fab mov hauv kuv lub teb chaws yog peb-theem 380V (ib theem 220V), thiab 500V megger feem ntau yog siv. Qhov no kuj yog ib qho kev ntsuas tsim nyog rau cov kws kho hluav taws xob thiab cov neeg ua haujlwm tu cov khoom siv hauv tsev. 1000V, 2500V, thiab 5000V feem ntau yog siv rau cov khoom siv hluav taws xob uas muaj zog ua haujlwm siab dua thiab siv los ntawm cov kws tshaj lij kev kuaj hluav taws xob.
Kev nyeem thawj zaug ntawm qee qhov megohmmeters tsis yog xoom, tab sis 1MΩ lossis 2MΩ. Yog tias hom megohmmeter no siv los ntsuas cov khoom siv hluav taws xob, cov khoom siv hauv tsev lossis cov khoom siv hluav taws xob hauv qhov chaw ntub dej, nws yuav ua rau kev nyeem tsis raug ntawm xoom megohms. Kev txiav txim.
Yog li ntawd, thaum cov kws tshaj lij hluav taws xob thiab cov neeg ua haujlwm tu cov khoom siv hauv tsev xaiv lub megohmmeter, lawv yuav tsum xaiv lub megohmmeter nrog qhov ntsuas ntawm {{0}} ~ 200MΩ lossis 0 ~ 500MΩ.
