Kev txheeb xyuas qhov yuam kev hauv kev ntsuas qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm cov multimeters
Lub multimeter muaj peb qhov tseem ceeb: lub taub hau meter, ntsuas Circuit Court thiab hloov pauv hloov.
Multimeter yog cov cuab yeej yooj yim tshaj plaws hauv kev ntsuas hluav taws xob thiab siv dav siv ntsuas ntsuas. Multimeter tseem hu ua multi-meter, triple meter (A, V, Ω uas yog, tam sim no, voltage, tsis kam, peb), multiplexing meter, multimeter, multimeter muab faib ua pointer multimeter thiab digital multimeter, kuj tseem muaj oscilloscope nrog. oscilloscope muaj nuj nqi ntawm oscilloscope multimeter, yog ib hom multifunctional, ntau yam ntsuas ntsuas. General multimeter tuaj yeem ntsuas DC tam sim no, DC voltage, AC voltage, tsis kam thiab suab theem, thiab lwm yam. Qee qhov tseem tuaj yeem ntsuas AC tam sim no, capacitance, inductance, kub thiab semiconductor (diode, transistor) ntawm qee qhov tsis muaj. Digital multimeter tau dhau los ua qhov tseem ceeb, tau hloov lub ntsuas ntsuas analog. Piv nrog analogue meters, digital meters muaj siab rhiab heev, siab raug, ntshiab zaub, muaj zog tshaj lub peev xwm, yooj yim rau nqa, thiab ntau yooj yim thiab yooj yim rau siv.
Nrog ib tug multimeter ntawm tib qhov ntau los ntsuas qhov sib txawv ntawm ob qhov hluav taws xob tsim los ntawm qhov yuam kev
Piv txwv li: MF-30 hom multimeter, nws qhov tseeb yog 2.5 qib, nrog 100V thaiv los ntsuas 20V thiab 80V tus qauv voltage, nug seb qhov thaiv qhov yuam kev me me?
Qhov tseeb txheeb ze yuam kev: △ A%=qhov siab tshaj qhov yuam kev △ X / ntsuas tus qauv voltage tswj × 100%, 100V thaiv ntawm qhov siab tshaj qhov yuam kev △ X (100)=± 2.5% × 100V {{ 8) ± 2.5V
Rau 20V, nws tus nqi tso saib yog nyob nruab nrab ntawm 17.5V-22.5V. Qhov siab tshaj qhov txheeb ze yuam kev yog: A (20)%=(± 2.5V/20V) × 100%=± 12.5%.
Rau 80V, nws tus nqi tso saib yog nyob nruab nrab ntawm 77.5V-82.5V. Qhov siab tshaj qhov txheeb ze yuam kev yog: A(80)% =±(2.5V/80V) × 100%=± 3.1%.
Kev sib piv Sib piv qhov siab tshaj qhov txheeb ze qhov yuam kev ntawm qhov ntsuas qhov ntsuas hluav taws xob 20V thiab 80V, nws tuaj yeem pom: qhov qub yog qhov loj dua qhov yuam kev tom kawg. Yog li ntawd, thaum ntsuas ob qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm ib qho multimeter, tus neeg twg los ze zog rau tag nrho cov nqi nres yuav muaj qhov tseeb dua. Yog li ntawd, thaum ntsuas qhov ntsuas hluav taws xob, ntsuas qhov ntsuas hluav taws xob yuav tsum tau ua kom qhia ntau tshaj 2/3 ntawm cov khoom siv multimeter. Tsuas yog nyob rau hauv txoj kev no tuaj yeem txo qhov kev ntsuas yuam kev.
Lub hauv paus ntsiab lus ntawm multimeter yog siv lub rhiab magneto-electric DC ammeter (microammeter) ua lub taub hau meter.
Thaum ib qho me me tam sim no dhau los ntawm lub taub hau meter, yuav muaj qhov qhia tam sim no. Txawm li cas los xij, lub taub hau tsis tuaj yeem hla cov tam sim no loj, yog li qee qhov kev tiv thaiv yuav tsum tau txuas nrog nyob rau hauv parallel thiab series ntawm lub taub hau kom shunt los yog nqis los ntawm qhov voltage, thiaj li ntsuas qhov tam sim no, voltage thiab kuj nyob rau hauv Circuit Court.
