Cov qauv ntawm digital multimeter thiab yuav siv nws li cas hauv kev nthuav dav
Multimeter, tseem hu ua multipurpose meter, multi-meter, triple meter, complex meter, thiab lwm yam, yog ib qho tseem ceeb ntsuas ntsuas nyob rau hauv lub hwj chim electronics thiab lwm yam departments, feem ntau yog ntsuas voltage, tam sim no thiab kuj yog lub ntsiab lub hom phiaj.
Multimeter muab faib ua pointer multimeter thiab digital multimeter raws li hom zaub. Nws yog ib qho khoom siv ntau yam, ntau qhov ntsuas ntsuas, feem ntau lub tshuab ntsuas ntsuas tau ntsuas DC tam sim no, DC voltage, AC tam sim no, AC voltage, tsis kam thiab qib suab, thiab lwm yam. Qee qhov kuj tuaj yeem ntsuas AC tam sim no, capacitance, inductance thiab qee qhov tsis sib xws ntawm semiconductors. (xws li, ), thiab lwm yam. Lub multimeter yog ib hom kev ntsuas ntsuas nrog lub rectifier, uas tuaj yeem siv rau kev ntsuas qhov hluav taws xob thiab kev ua haujlwm.
Multimeter yog ib hom magneto-hluav taws xob ntsuas nrog rectifier, uas tuaj yeem ntsuas ntau yam hluav taws xob xws li AC thiab DC tam sim no, voltage thiab tsis kam. Rau txhua qhov hluav taws xob ntau, feem ntau muaj ntau ntau yam.
Kuj tseem hu ua multi-meter lossis tsuas yog multi-meter. Lub multimeter muaj xws li magneto-electric ammeter (lub taub hau), ntsuas Circuit Court, thiab ib tug selector hloov. Los ntawm kev hloov qhov hloov pauv, ntau yam kev ntsuas hluav taws xob tuaj yeem ntsuas tau yooj yim. Lub hauv paus tseem ceeb rau kev suav hauv Circuit Court yog Ohm txoj cai rau kaw circuits. Muaj ntau hom multimeters, uas yuav tsum tau xaiv raws li cov kev xav tau sib txawv.
Multimeter rau MF30 hom pointer multimeter thiab DT840 hom digital multimeter ua piv txwv, kom nkag siab txog nws cov qauv thiab kev ua haujlwm, kawm siv cov multimeter kom raug ntsuas qhov voltage, tam sim no, tsis kam thiab lwm yam kev siv hluav taws xob, paub txog kev siv ceev faj.
1. Cov qauv ntawm Pointer Multimeter
Feem ntau los ntawm lub taub hau, ntsuas kab, hloov peb ntu.
Kev siv pointer multimeter, lub ntsiab lus tseem ceeb rau cov ntsiab lus hauv qab no:
(1) Ua ntej siv, tus pointer ntawm lub ntsuas lub taub hau yuav tsum xoom.
(2) Ua ntej ntsuas, qhov hloov pauv hloov yuav tsum raug hu mus rau qhov chaw tsim nyog raws li cov khoom thiab qhov loj ntawm lub zog ntsuas.
(3) Kev ntsuas ua tiav, kev hloov pauv hloov yuav tsum tau hu mus rau qhov siab tshaj plaws AC cov ntaub ntawv hluav taws xob, qee qhov multimeter (xws li 500 hom) yuav tsum tau hu mus rau qhov hloov pauv hloov cim "..." Qhov chaw khoob.
2, AC voltage ntsuas
(1) Ua ntej ntsuas, hloov mus rau qhov sib thooj AC voltage ntau. Yog tias koj tsis paub qhov loj ntawm qhov ntsuas voltage, qhov ntau yuav tsum tau muab tso rau hauv qhov siab tshaj plaws kom tsis txhob muaj kev puas tsuaj rau lub taub hau meter.
(2) Thaum ntsuas, txuas lub ntsuas mem hauv qhov sib npaug mus rau lub ntsuas hluav taws xob lossis cov ntsuas ntsuas. Nws yog nruj me ntsis txwv tsis pub toggle qhov hloov pauv hloov mus xaiv qhov ntau yam thaum ntsuas.
(3) Thaum ntsuas qhov hluav taws xob, nkag mus rau hauv tus cwj pwm ntawm kev ua haujlwm ib leeg thiab mloog zoo rau koj.
(4) Raws li qhov ntsuas hluav taws xob AC ntawm lub xov tooj yog ntsuas raws li sinusoidal AC, yog tias qhov ntsuas qhov ntsuas tsis yog sinusoidal, qhov yuam kev yuav loj dua.
(5) Qhov ntau zaus ntawm kev ntsuas AC voltage feem ntau yog 45HZ ∽ 1000HZ, yog tias ntau tshaj qhov ntau, qhov yuam kev yuav nce.
3 DC voltage ntsuas
Kev ntsuas txoj kev thiab AC voltage yog qhov zoo ib yam, tab sis ua tib zoo saib rau ob lub ntsiab lus hauv qab no:
(1) nrog rau kev ntsuas ntawm AC voltage, ntsuas ua ntej hloov mus rau DC voltage iav, nyob rau hauv cov ntaub ntawv ntawm qhov ntsuas voltage tsis meej ua ntej, qhov ntau yuav tsum tsis txhob me me; kev ntsuas, tus cwj mem yuav tsum tau txuas nrog rau qhov sib npaug nrog qhov ntsuas ntsuas, qhov ntsuas tsis raug tso cai rau toggle hloov pauv hloov.
(2) Thaum ntsuas, qhov zoo thiab qhov tsis zoo ntawm lub ntsuas mem yuav tsum raug sau tseg. Tus cwj mem liab txuas nrog lub siab muaj peev xwm kawg ntawm Circuit Court raug ntsuas, thiab tus cwj mem dub txuas nrog rau qhov kawg ntawm qhov kawg. Yog hais tias lub 'meter' cwj mem txuas nrog qhov sib txawv, tus pointer ntawm lub taub hau 'meter' yuav tawm tsam rov qab, thiab nws yooj yim rau khoov tus pointer. Yog tias koj tsis paub lub peev xwm ntawm qhov ntsuas qhov ntsuas siab siab lossis qis, koj tuaj yeem maj mam sim kov qhov ntsuas ntsuas nrog lub ntsuas ntsuas. Yog hais tias tus pointer thim rov qab bias, lub polarity ntawm tus cwj mem yog thim rov qab, pauv tus cwj mem tuaj yeem ua tau.
4. Kev ntsuas ntawm DC tam sim no
(1) Kev ntsuas, multimeter yuav tsum nyob rau hauv series nrog ntsuas Circuit Court, tsis nyob rau hauv parallel.
(2) yuav tsum xyuam xim rau qhov zoo thiab qhov tsis zoo ntawm tus cwj mem. Kev ntsuas, tus cwj mem liab txuas nrog lub Circuit Court tawg siab muaj peev xwm kawg, tus cwj mem dub txuas nrog lub peev xwm kawg.
(3) Thaum tsis muaj qhov loj ntawm qhov ntsuas tam sim no, qhov ntau yuav tsum loj dua li qhov me me. Nws yog nruj me ntsis txwv tsis pub toggle qhov hloov pauv hloov mus xaiv qhov ntau hauv qhov ntsuas.
