Txoj kev xaiv ntawm pointer hom multimeter thiab digital multimeter
1. Kev nyeem ntawv qhov tseeb ntawm lub ntsuas ntsuas ntsuas yog qhov tsis zoo, tab sis cov txheej txheem ntawm pointer oscillation yog qhov xav tau ntau dua, thiab qhov amplitude ntawm nws cov oscillation ceev tuaj yeem qee zaum cuam tshuam qhov ntsuas qhov loj me (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 nkag siab, tab sis cov txheej txheem ntawm cov lej hloov pauv zoo li ntxhov thiab tsis yooj yim rau kev soj ntsuam.
2. Lub pointer feem ntau muaj ob lub roj teeb sab hauv, 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 qhov zoo piv rau qhov kev sojntsuam liab. Lub ntsuas hluav taws xob feem ntau siv 6V lossis 9V roj teeb. 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 ntsuas digital. Kev siv R × 1 Ω ntau tuaj yeem ua rau tus neeg hais lus tawm suab nrov "nyem", 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 siab thiab tsis tshua muaj tam sim no, 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 theem voltage ntawm lub raj TV, ntsuas tus nqi yuav qis dua qhov tseeb. tus nqi). Qhov 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 theem, thiab muaj kev cuam tshuam me ntsis ntawm qhov ntsuas hluav taws xob. Tab sis cov zis impedance siab heev ua rau nws raug cuam tshuam los ntawm induced voltage, thiab cov ntaub ntawv ntsuas nyob rau hauv tej lub sij hawm uas muaj zog electromagnetic cuam tshuam tej zaum yuav tsis muaj tseeb.
4. Nyob rau hauv cov ntsiab lus, pointer meters yog haum rau analog Circuit Court ntsuas nrog kuj high tam sim no thiab voltage, xws li TV thiab suab amplifiers. Cov ntsuas hluav taws xob, xws li cov xov tooj ntawm tes, tsim nyog rau ntsuas qhov hluav taws xob tsis tshua muaj hluav taws xob thiab tsis tshua muaj hluav taws xob digital circuits. Tsis meej, pointer thiab digital meters tuaj yeem xaiv raws li qhov xwm txheej.
