Kev siv cov digital multimeters tiv thaiv pointer multimeters
1. Kev nyeem ntawv qhov tseeb ntawm lub ntsuas ntsuas ntsuas yog qhov tsis zoo, tab sis cov txheej txheem ntawm lub viav vias pointer yog qhov xav tau ntau dua, thiab nws qhov viav vias nrawm tuaj yeem qee zaum cuam tshuam txog qhov loj ntawm qhov ntsuas tus nqi (xws li qhov sib txawv me ntsis ntawm TV cov ntaub ntawv tsheb npav ( SDL) thaum xa cov ntaub ntawv.jitter); Kev nyeem ntawv ntawm lub ntsuas ntsuas digital yog qhov xav tau, tab sis cov txheej txheem ntawm kev hloov pauv digital zoo li ntxhov thiab tsis yooj yim saib.
2. Feem ntau muaj ob lub roj teeb nyob rau hauv lub pointer saib, ib qho yog tsawg voltage 1.5V, lwm yam yog high voltage 9V los yog 15V, thiab cov dub xeem lead yog zoo davhlau ya nyob twg txheeb ze rau cov liab xeem lead. Cov ntsuas hluav taws xob feem ntau siv 6V lossis 9V roj teeb. Hauv hom kev tiv thaiv, cov zis tam sim no ntawm tus cwj mem ntsuas ntawm lub ntsuas ntsuas ntsuas yog qhov loj dua li ntawm cov ntsuas digital. Lub suab nrov tuaj yeem ua suab nrov "da" nrog R × 1Ω iav, thiab lub teeb-emitting diode (LED) tuaj yeem txawm teeb nrog R × 10kΩ iav.
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 nrog cov ntsuas digital, thiab qhov ntsuas qhov tseeb yog qhov tsis zoo. Qee lub sijhawm uas muaj qhov hluav taws xob siab thiab micro tam sim no tsis tuaj yeem ntsuas qhov tseeb, vim tias nws qhov kev tiv thaiv sab hauv yuav cuam tshuam rau Circuit Court hauv kev sim (piv txwv li, thaum ntsuas qhov nrawm theem voltage ntawm lub raj duab TV, qhov 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 qhov loj heev, yam tsawg kawg hauv megohm theem, thiab muaj kev cuam tshuam me me rau hauv Circuit Court hauv kev sim. Txawm li cas los xij, qhov tso zis ntau dhau impedance ua rau nws raug cuam tshuam rau qhov cuam tshuam ntawm qhov hluav taws xob induced, 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 meters yog haum rau kev ntsuas ntawm analog circuits nrog cov tam sim no thiab high voltage, xws li TV teeb thiab suab amplifiers. Nws yog qhov tsim nyog rau cov ntsuas hluav taws xob hauv kev ntsuas qhov ntsuas hluav taws xob qis thiab qis tam sim no digital circuits, xws li BP tshuab, xov tooj ntawm tes, thiab lwm yam. Nws tsis yog tshwj xeeb, thiab cov lus taw qhia thiab cov rooj digital tuaj yeem xaiv raws li qhov xwm txheej. digital meter
