Kev xaiv ntawm Digital thiab Analog Multimeters
1.Analog multimeters muab kev nyeem ntawv tsawg dua, tsis tau lub pointer viav vias yog intuitive thiab pom. Qhov ceev thiab amplitude ntawm deflection tuaj yeem cuam tshuam qhov hloov maj mam hloov hauv qhov ntsuas qhov ntau. Piv txwv li, nws qhia meej meej qhov kev hloov pauv me ntsis ntawm lub tsheb npav TV (SDL) thaum lub sijhawm xa cov ntaub ntawv. Digital multimeters tso saib nyeem ncaj qha; Txawm li cas los xij, cov lej hloov pauv sai feem ntau tshwm sim tsis zoo thiab nyuaj rau kev soj ntsuam tas li.
2.Analog multimeters feem ntau muaj ob lub roj teeb: qis-voltage 1.5 V cell thiab high-voltage 9 V lossis 15 V roj teeb. Ntawm analog meters, qhov kev sojntsuam dub yog qhov zoo rau qhov kev sojntsuam liab. Cov multimeters digital feem ntau siv ib zaug xwb 6 V lossis 9 V roj teeb.Nyob rau hauv hom kev tiv thaiv, analog multimeters muab ntau dua kev sojntsuam tso zis tam sim no dua li cov qauv digital. Qhov R × 1 ntau tuaj yeem tsim lub suab nrov nrov los ntawm tus hais lus, thaum R × 10k ntau tuaj yeem teeb lub LED.
3.Nyob rau hauv voltage ntsuas hom, analog multimeters muaj qis sab hauv tsis kam thiab tsis zoo qhov tseeb. Lawv feem ntau tsis xa cov txiaj ntsig zoo hauv high-voltage thiab micro-tam sim no circuits, vim hais tias lawv tsis tshua muaj kev tiv thaiv nyob rau hauv loads thiab cuam tshuam Circuit Court nyob rau hauv kev sim. Piv txwv li, thaum ntsuas qhov nrawm anode voltage ntawm lub TV duab raj, kev nyeem ntawv yuav qis dua li tus nqi tiag tiag.Digital multimeters feature tsis tshua muaj siab sab hauv tsis kam ntawm qib megaohm, ua rau tsis muaj kev thauj khoom ntawm lub voj voog. Txawm li cas los xij, lawv ultra-high input impedance ua rau lawv raug cuam tshuam los ntawm kev cuam tshuam voltage; ntsuas qhov tseem ceeb yuav ua tsis ruaj tsis khov los yog tsis tseeb nyob rau hauv ib puag ncig uas muaj zog electromagnetic cuam tshuam.
4.Nyob rau hauv cov ntsiab lus, analog multimeters yog ntau haum rau ntsuas analog circuits nrog kuj muaj tam sim no thiab high voltage, xws li TVs thiab lub hwj chim amplifiers. Digital multimeters ua haujlwm zoo dua rau cov hluav taws xob qis, me me tam sim no digital circuits, xws li pagers thiab xov tooj ntawm tes. Ob hom yog universally superior; Cov neeg siv tuaj yeem xaiv analog lossis digital multimeters raws li cov kev xav tau ntawm daim ntawv thov.
