Multimeter ntsuas txoj kev thiab AC zaus teb
Cov multimeter tsis tuaj yeem ntsuas DC voltage (DCV), AC voltage (ACV), DC tam sim no (DCA), AC tam sim no (ACA), tsis kam (Ω), diode rau pem hauv ntej voltage poob (VF), transistor emitter tam sim no amplification yam ( hrg), tab sis kuj ntsuas capacitance (C), conductance (ns), kub (T), zaus (f), thiab tau ntxiv buzzer hom (BZ) thiab low-power method kuj hom (L0 Ω) rau kev soj ntsuam Circuit Court continuity. Qee cov twj paj nruag kuj muaj cov haujlwm ntawm inductance hom, teeb liab hom, AC / DC tsis siv neeg hloov dua siab tshiab, thiab capacitance hom tsis siv neeg hloov pauv ntau yam.
Feem ntau hais lus, txoj kev ntsuas ntawm multimeter feem ntau yog ntsuas AC cov cim. Raws li peb txhua tus paub, muaj ntau hom thiab cov xwm txheej nyuaj ntawm AC teeb liab, thiab nrog kev hloov pauv ntawm AC teeb liab zaus, ntau zaus cov lus teb tshwm sim, uas cuam tshuam rau kev ntsuas ntawm multimeter. Feem ntau muaj ob txoj hauv kev rau kev ntsuas AC cov cim nrog ib qho multimeter: tus nqi nruab nrab thiab qhov muaj txiaj ntsig zoo ntsuas. Qhov nruab nrab ntsuas feem ntau yog siv rau cov ntshiab sine tsis, uas siv cov txheej txheem ntawm kev kwv yees qhov nruab nrab los ntsuas AC cov cim, thaum yuav muaj teeb meem loj rau cov tsis yog sine wave signals.
Nyob rau tib lub sijhawm, yog tias muaj kev cuam tshuam kev sib haum xeeb tshwm sim hauv sine wave signals, qhov kev ntsuas qhov yuam kev kuj tseem yuav hloov pauv. Kev ntsuas RMS tiag tiag siv tus nqi siab tshaj plaws tam sim no ntawm lub waveform muab faib los ntawm 0.707 los xam cov tam sim no thiab qhov hluav taws xob, xyuas kom meej cov kev nyeem ntawv hauv qhov tsis sib haum xeeb thiab tsis muaj suab nrov. Nyob rau hauv txoj kev no, yog tias koj xav pom cov ntaub ntawv digital zoo tib yam, ntsuas nrog qhov nruab nrab multimeter yuav tsis ua tiav qhov ntsuas qhov tseeb. Cov lus teb zaus ntawm cov teeb liab kev sib txuas lus kuj tseem ceeb heev, thiab qee qhov tuaj yeem ncav cuag 100KHz.
Txoj Kev Loj Hlob ntawm Digital Multimeters
Kev sib xyaw ua ke: Lub handheld digital multimeter txais ib qho-chip A / D converter, thiab cov khoom siv hluav taws xob yog qhov yooj yim, tsuas yog xav tau qee qhov me me ntawm cov chips thiab cov khoom siv. Nrog rau qhov kev tshwm sim tas mus li ntawm cov chips rau ib leeg-chip digital multimeters, ib leeg IC tuaj yeem siv los tsim kom muaj kev ua haujlwm tsis siv neeg ntau yam digital multimeter, tsim kom muaj txiaj ntsig zoo rau kev tsim qauv yooj yim thiab txo cov nqi.
