Cov hauv qab no yuav tsum tau xav txog ua ntej yuav ib lub multimeter:
1. Kev nyeem ntawv qhov tseeb ntawm pointer meters yog qhov tsis zoo, tab sis cov txheej txheem ntawm pointer oscillation yog qhov yooj yim heev, thiab qhov amplitude ntawm nws cov oscillation ceev muaj peev xwm qee zaum objectively cuam tshuam qhov loj ntawm cov khoom ntsuas (xws li me ntsis jitter ntawm TV cov ntaub ntawv tsheb npav (SDL) thaum xa cov ntaub ntawv); Kev nyeem ntawv ntawm lub ntsuas hluav taws xob yog qhov xav tau, tab sis cov txheej txheem ntawm cov lej hloov pauv zoo li chaotic thiab nyuaj rau kev soj ntsuam.
2. Feem ntau muaj ob lub roj teeb hauv lub ntsuas ntsuas ntsuas, ib qho muaj qhov tsis tshua muaj hluav taws xob ntawm 1.5V thiab lwm qhov muaj qhov hluav taws xob siab ntawm 9V lossis 15V. Qhov kev sojntsuam dub yog lub davhlau ya nyob twg zoo txheeb ze rau qhov kev sojntsuam liab. Lub roj teeb 6V lossis 9V feem ntau yog siv rau digital watches. Nyob rau hauv qhov kev tiv thaiv ntau yam, cov zis tam sim no ntawm lub ntsuas ntsuas ntsuas yog qhov loj dua li ntawm cov ntsuas digital. Kev siv R × 1 Ω ntau tuaj yeem ua rau tus neeg hais lus ua suab nrov "nias", thiab siv R × 10k Ω ntau tuaj yeem teeb lub teeb-emitting diode (LED).
3. Nyob rau hauv qhov hluav taws xob ntau, qhov kev tiv thaiv sab hauv ntawm lub ntsuas ntsuas ntsuas yog qhov me me piv rau cov ntsuas digital, thiab qhov ntsuas qhov tseeb yog qhov tsis zoo. Hauv qee qhov xwm txheej high-voltage microcurrent, nws tseem tsis tuaj yeem ntsuas qhov tseeb vim nws qhov kev tiv thaiv sab hauv tuaj yeem cuam tshuam rau qhov ntsuas hluav taws xob (piv txwv li, thaum ntsuas qhov nrawm ntawm lub TV cathode ray tube, qhov ntsuas tus nqi yuav qis dua li tus nqi tiag). Kev tiv thaiv sab hauv ntawm qhov ntsuas hluav taws xob ntawm lub ntsuas hluav taws xob yog siab heev, yam tsawg kawg hauv megaohm ntau yam, thiab muaj kev cuam tshuam me ntsis ntawm qhov ntsuas hluav taws xob. Txawm li cas los xij, qhov tso zis ntau dhau impedance ua rau nws muaj kev cuam tshuam rau qhov cuam tshuam ntawm induced voltage, thiab cov ntaub ntawv ntsuas nyob rau hauv qee qhov xwm txheej uas muaj zog electromagnetic cuam tshuam yuav tsis raug.
4. Nyob rau hauv luv luv, pointer meters yog haum rau ntsuas analog circuits nrog kuj muaj tam sim no thiab high voltage, xws li TV thiab suab amplifiers. Cov ntsuas hluav taws xob tsim nyog rau kev ntsuas qhov hluav taws xob tsis tshua muaj hluav taws xob thiab tsis tshua muaj hluav taws xob digital circuits, xws li BP tshuab, xov tooj ntawm tes, thiab lwm yam. Nws tsis yog qhov tseeb, thiab tus taw tes thiab cov xov tooj tuaj yeem xaiv tau raws li qhov xwm txheej.
