Thaum xaiv ib lub ntsuas ntsuas, cov lus nug uas nquag hnov feem ntau yog "yuav ua li cas" thiab "qhov tseeb". Muaj ntau ntau yam uas cuam tshuam rau qhov tseeb ntawm lub clamp meter. Kev tsim qauv / kev ua haujlwm, kev siv bandwidth, zaus teb, suav nrog seb qhov ntau npaum li cas raug xaiv, yuav cuam tshuam rau kev nyeem ntawv. Txawm li cas los xij, ntawm tag nrho cov xwm txheej no, ib qho tseem ceeb tshaj plaws yog qhov tseeb RMS ntsuas, tshwj xeeb tshaj yog rau cov neeg siv kev lag luam uas muaj ntau yam khoom siv hluav taws xob thiab cov khoom siv hluav taws xob nyuaj.
Tsis muaj tseeb RMS, uas yog, qhov nruab nrab qhov ntsuas ntsuas, feem ntau yog tsom rau kev ntsuas ntawm sine yoj ntawm tus qauv fais fab zaus. Lub hauv paus ntsiab lus ntawm kev siv yog los hloov cov ntsuas ntsuas ntsuas ntsuas qhov ntsuas x1.1 rau hauv sine yoj 'RMS' nyeem ntawv. Qhov no zoo kawg nkaus nyob rau hauv ib puag ncig uas hluav taws xob yog qhov yooj yim, xws li cov tsev thiab cov khoom.
Nyob rau hauv ib puag ncig kev lag luam, tshwj xeeb tshaj yog kev siv ntau thiab ntau zaus hloov dua siab tshiab, rectifier, inverter thiab lwm yam khoom siv, qhov tseeb waveforms tau dhau los ua ntau thiab ntau haiv neeg, thiab ntau thiab ntau lub suab nrov nrov tau qhia. Kev ntsuas qhov tseeb, qhov tseeb RMS dhau los ua ib qho tseem ceeb tshaj plaws.
Thaum nws los txog rau lub suab nrov lossis kev sib haum xeeb, lwm lub tswv yim tseem ceeb yuav tsum tau hais txog: low-pass filter (LPF). Qhov cuam tshuam yog tias tsuas yog qhov tsawg zaus tam sim no thiab qhov hluav taws xob tuaj yeem ntsuas tau, thiab qhov siab zaus yuav raug txiav tawm thiab tsis suav. Nws tuaj yeem hais tau tias tsuas yog qhov tseeb RMS clamp meter nrog qhov ntsuas qis qis yog qhov muaj txiaj ntsig tiag tiag 'RMS tiag'.
