Dab tsi yog qhov kev qhia ua haujlwm ntawm digital multimeter?
Ib qho digital multimeter tuaj yeem ntsuas DC tam sim no, DC voltage, AC tam sim no, AC voltage, tsis kam, thiab suab zaus voltage, thiab qee qhov kuj tuaj yeem ntsuas AC tam sim no, capacitance, inductance, thiab qee qhov ntawm cov khoom siv hluav taws xob. Lub hauv paus ntsiab lus yog siv lub rhiab magnetoelectric DC ammeter (microammeter) ua lub taub hau meter. Thaum ib tug me me tam sim no hla lub taub hau ' meter ', lub multimeter yuav qhia qhov tam sim no.
Ib qho digital multimeter tuaj yeem ntsuas qhov tsis kam thiab AC / DC voltage ntawm cov khoom ntsuas, tab sis kuj ntsuas DC voltage. Qee qhov multimeters tuaj yeem ntsuas qhov tseem ceeb ntawm cov transistors thiab lub peev xwm ntawm capacitors. Kev paub txog kev siv lub tshuab multimeter yog ib qho kev txawj ntse tshaj plaws hauv kev siv tshuab hluav taws xob. Cov multimeters muaj xws li analog multimeters thiab digital multimeters. Ib qho analog multimeter yog ib qho kev ntsuas ntau yam nrog lub taub hau ' meter ' raws li nws cov ntsiab lus tseem ceeb, thiab ntsuas tus nqi yog qhia thiab nyeem los ntawm lub ntsuas lub taub hau pointer. Qhov ntsuas tus nqi ntawm cov multimeter yog ncaj qha tso tawm hauv daim ntawv digital ntawm cov kua siv lead ua kua, ua rau nws yooj yim nyeem, thiab qee qhov txawm tuaj nrog lub suab ua haujlwm. Lub multimeter qhia ib lub taub hau 'meter' thiab integrates ib voltmeter, ammeter, thiab ohmmeter rau hauv ib lub twj paj nruag.
Kev teeb tsa DC tam sim no ntawm multimeter yog ntau -ntau DC voltmeter. Los ntawm kev txuas lub taub hau 'meter' nyob rau hauv parallel nrog kaw - Circuit Court voltage divider resistor, nws qhov voltage ntau tuaj yeem nthuav dav. Kev teeb tsa DC voltage ntawm multimeter kuj tseem yog ntau -ntau DC voltmeter. Los ntawm kev sib txuas lub 'meter' lub taub hau nyob rau hauv series nrog ib tug voltage divider resistor, nws voltage range yuav nthuav. Qhov sib txawv voltage divider resistors sib haum mus rau qhov ntsuas sib txawv. Lub taub hau ntawm lub ntsuas hluav taws xob yog lub tshuab ntsuas magnetoelectric, uas tuaj yeem hla ncaj qha tam sim no (DC). Nws siv lub diode los hloov pauv tam sim no (AC) rau hauv DC, yog li ua kom qhov ntsuas ntawm AC.
