Kev xaiv ntawm pointer multimeter thiab digital multimeter:
1. Kev nyeem ntawv qhov tseeb ntawm tus pointer multimeter yog qhov tsis zoo, tab sis cov txheej txheem ntawm lub pointer viav vias yog qhov nkag siab zoo, thiab qhov amplitude ntawm lub viav vias nrawm tuaj yeem cuam tshuam qhov ntsuas qhov loj ntawm lub hom phiaj (xws li kev hloov pauv me ntsis ntawm TV cov ntaub ntawv tsheb npav (SDL ) thaum xa cov ntaub ntawv. jitter); cov digital multimeter nyeem intuitively, tab sis cov txheej txheem ntawm cov kev hloov digital zoo li cluttered thiab tsis yooj yim rau saib.
2. Feem ntau muaj ob lub roj teeb nyob rau hauv lub pointer multimeter, ib tug low-voltage 1.5V thiab high-voltage 9V los yog 15V. Lub multimeter dub yog lub davhlau ya nyob twg zoo piv rau liab multimeter. Digital multimeters feem ntau siv 6V lossis 9V roj teeb. Nyob rau hauv hom tsis kam, cov zis tam sim no ntawm tus cwj mem multimeter ntawm tus pointer multimeter yog qhov loj dua li ntawm digital multimeter. Siv R × 1Ω hom tuaj yeem ua rau tus neeg hais lus ua suab nrov "da", thiab R × 10kΩ hom tuaj yeem ua rau lub teeb pom kev zoo (LED). .
3. Nyob rau hauv qhov voltage ntau, lub internal kuj ntawm tus pointer multimeter kuj me me piv rau cov multimeter digital, thiab qhov ntsuas qhov tseeb yog qhov tsis zoo. Qee qhov xwm txheej high-voltage thiab micro-tam sim no tsis tuaj yeem ntsuas qhov tseeb, vim tias qhov kev tiv thaiv sab hauv yuav cuam tshuam rau lub voj voog hauv kev sim (piv txwv li, thaum ntsuas qhov nrawm theem voltage ntawm lub raj duab TV, qhov ntsuas tus nqi yuav qis dua li qhov ntsuas hluav taws xob. tus nqi tiag). Qhov kev tiv thaiv sab hauv ntawm qhov ntsuas hluav taws xob ntawm cov digital multimeter yog qhov loj heev, yam tsawg kawg hauv megohm theem, thiab muaj kev cuam tshuam me ntsis ntawm Circuit Court hauv kev sim. Txawm li cas los xij, qhov tso zis siab impedance ua rau nws raug cuam tshuam rau qhov cuam tshuam ntawm qhov hluav taws xob, thiab cov ntaub ntawv ntsuas yuav tsis raug nyob rau qee lub sijhawm uas muaj zog electromagnetic cuam tshuam.
4. Nyob rau hauv luv luv, pointer multimeters yog haum rau analog Circuit Court ntsuas nrog kuj muaj tam sim no thiab high voltage, xws li TV teeb thiab lub hwj chim amplifiers. Nws yog tsim rau digital multimeters hauv kev ntsuas qhov ntsuas hluav taws xob tsis tshua muaj hluav taws xob thiab cov hluav taws xob me me tam sim no, xws li BP tshuab, xov tooj ntawm tes, thiab lwm yam. Tsis yog, pointer multimeter thiab digital multimeter tuaj yeem siv raws li qhov xwm txheej.
