Yuav ua li cas kho lub buzzer ntawm pointer multimeter thaum nws tsis suab
Rau feem ntau siv MF47 pointer multimeter, qee cov qauv tuaj nrog kev kuaj pom. Uas yog hais, ib tug buzzer yog kev cob cog rua nyob rau hauv series nyob rau hauv lub Circuit Court. Txoj kev buzzer nrhiav pom; Cov iav no nyob ib sab ntawm cov iav tiv thaiv R * 1 Ω.
Cov iav no feem ntau yog siv los txiav txim siab sai sai rau qhov xwm txheej ntawm / tawm ntawm lub voj voog. Thaum nws yog ntsuas kom nyob rau, lub buzzer yuav tam sim ntawd emit suab beep. Nws tsis yog qhov tsim nyog los saib cov koob qhia ntawm lub multimeter nrog koj ob lub qhov muag kom nkag siab txog qhov xwm txheej ntawm / tawm ntawm lub voj voog.
Ua ntej, zoo li cov iav resistor, qhov ntsuas yuav tsum tau xoom. Lub sijhawm no, lub buzzer yuav tawm lub suab nrov ntev txog 1kHz thaum nws ua haujlwm, thiab kev ntsuas tuaj yeem ua tiav. Thaum tus nqi tsis kam ntawm qhov ntsuas hluav taws xob qis dua li 10 Ω, lub buzzer yuav tawm suab nrov. Nws yuav tsum tau muab sau tseg tias lub suab siv ntawm lub buzzer yog inversely proportional rau tus nqi kuj nyob rau hauv lub ntsuas Circuit Court (piv txwv li qhov loj dua tus nqi kuj nyob rau hauv Circuit Court, lub me me lub suab emitted los ntawm lub buzzer). Lub sijhawm no, tus nqi ntawm tus lej dial yog kwv yees li R * 3 (tus nqi siv).
Rau hom pointer multimeter, qhov kev puas tsuaj rau lub buzzer feem ntau yog tshwm sim los ntawm tus neeg siv yuam kev teeb tsa lub buzzer iav los ntsuas AC voltage, ua rau muaj kev puas tsuaj. Txhawm rau muab cov lus nug kom nkag siab meej txog kev kho lub buzzer puas.
Muaj ob hom buzzers, ib qho yog piezoelectric ceramic buzzer hniav, thiab lwm yam yog electromagnetic buzzer. Multimeters sib txawv tuaj yeem siv cov buzzers sib txawv. Lub piezoelectric ceramic buzzer yog ntsuas nrog ib tug multimeter thiab ua suab tab sis muaj ib tug siab heev tus nqi kuj, thaum lub electromagnetic buzzer muaj ib tug tej yam kuj nqi thiab emits ib tug buzzing suab thaum ntsuas nrog ib tug multimeter.
