Multimeters, tseem hu ua multiplex meters, multimeters, triple meters, multimeters, thiab lwm yam, yog indispensable ntsuas ntsuas nyob rau hauv lub hwj chim electronics thiab lwm yam departments. Feem ntau, lub hom phiaj tseem ceeb yog ntsuas qhov voltage, tam sim no thiab tsis kam. Multimeters muab faib ua pointer multimeters thiab digital multimeters raws li hom zaub. Nws yog ib tug multi-function thiab ntau yam ntsuas ntsuas. Feem ntau, multimeter tuaj yeem ntsuas DC tam sim no, DC voltage, AC tam sim no, AC voltage, tsis kam thiab suab qib, thiab lwm yam, thiab qee qhov kuj tuaj yeem ntsuas AC tam sim no, capacitance, inductance thiab semiconductor. Qee qhov parameter (xws li) thiab lwm yam.
Kev xaiv ntawm pointer watch thiab digital watch:
1. Kev nyeem ntawv qhov tseeb ntawm lub pointer lub rooj yog qhov tsis zoo, tab sis cov txheej txheem ntawm lub viav vias taw tes yog qhov xav tau, thiab qhov amplitude ntawm lub viav vias nrawm tuaj yeem cuam tshuam qhov ntsuas qhov loj ntawm lub hom phiaj (xws li qhov hloov pauv me ntsis ntawm TV cov ntaub ntawv tsheb npav (SDL). ) thaum xa cov ntaub ntawv). tshee); cov ntsuas digital nyeem intuitively, tab sis cov txheej txheem ntawm kev hloov 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 lossis 15V, cov hlau lead kuaj dub yog qhov kawg zoo txheeb ze rau cov hlau kuaj liab. 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. Siv cov ntaub ntawv R × 1Ω tuaj yeem ua rau tus neeg hais lus tawm suab nrov "nyem", thiab cov ntaub ntawv R × 10kΩ 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. 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 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, thiab cov ntaub ntawv ntsuas yuav tsis raug nyob rau qee lub sijhawm uas muaj zog electromagnetic cuam tshuam.
4. Nyob rau hauv ib lo lus, pointer meter yog haum rau analog Circuit Court ntsuas nrog kuj muaj tam sim no thiab high voltage, xws li TV thiab suab amplifier. Cov ntsuas hluav taws xob tsim nyog rau kev ntsuas hluav taws xob digital ntawm qhov ntsuas hluav taws xob tsawg thiab me me tam sim no, xws li BP tshuab, xov tooj ntawm tes, thiab lwm yam. Nws tsis yog qhov tseeb, thiab cov lus taw qhia thiab cov rooj digital tuaj yeem xaiv raws li qhov xwm txheej.
