Kev soj ntsuam yuam kev ntawm kev ntsuas qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm multimeter
Lub multimeter yog tsim los ntawm peb qhov tseem ceeb: meter taub hau, ntsuas Circuit Court thiab hloov pauv hloov.
Lub multimeter yog cov cuab yeej yooj yim tshaj plaws hauv kev ntsuas hluav taws xob, thiab nws kuj yog cov cuab yeej siv dav siv. Multimeters tseem hu ua multimeters, peb lub hom phiaj ntsuas (A, V, Ω yog tam sim no, voltage, thiab tsis kam), multimeters, thiab multimeters. Multimeters muab faib ua pointer multimeters thiab digital multimeters. Kuj tseem muaj multimeter nrog oscilloscope muaj nuj nqi. Lub oscilloscope multimeter yog ib qho khoom siv ntau yam, ntau qhov ntsuas ntsuas. General multimeters tuaj yeem ntsuas DC tam sim no, DC voltage, AC voltage, tsis kam thiab suab qib, thiab lwm yam, thiab qee qhov kuj tuaj yeem ntsuas AC tam sim no, capacitance, inductance, kub thiab qee qhov tsis sib xws ntawm semiconductors (diodes, triodes). Digital multimeters tau dhau los ua qhov tseem ceeb thiab tau hloov cov ntsuas analog. Piv nrog cov cuab yeej analog, cov cuab yeej digital muaj qhov rhiab heev, siab precision, pom tseeb, muaj zog tshaj qhov muaj peev xwm, nqa tau yooj yim, thiab yooj yim dua thiab siv yooj yim.
Qhov yuam kev ua los ntawm kev ntsuas ob qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm ib qho multimeter
Piv txwv li: MF-30 multimeter, nws qhov tseeb yog 2.5, siv 100V iav los ntsuas tus qauv voltage ntawm 20V thiab 80V, lub iav twg muaj qhov yuam kev me dua?
Cov txheeb ze yuam kev ntau tshaj plaws: △A feem pua = qhov yuam kev siab tshaj plaws △X / ntsuas tus qauv voltage hloov × 100 feem pua, qhov siab tshaj qhov yuam kev ntawm 100V thaiv △X(100)=± 2.5 feem pua × 100V{{8 ± 2.5V
Rau 20V, nws qhov taw qhia tus nqi yog nyob nruab nrab ntawm 17.5V-22.5V. Nws qhov yuam kev loj tshaj plaws yog: A(20) feem pua =(± 2.5V/20V) × 100 feem pua =± 12.5 feem pua .
Rau 80V, nws qhov taw qhia tus nqi yog nyob nruab nrab ntawm 77.5V-82.5V. Qhov siab tshaj qhov txheeb ze yuam kev yog: A(80) feem pua =±(2.5V/80V) × 100 feem pua =±3.1 feem pua .
Muab piv rau qhov kev txheeb ze tshaj plaws ntawm qhov ntsuas qhov ntsuas hluav taws xob 20V thiab 80V, nws tuaj yeem pom tau tias qhov yuam kev ntawm qhov qub yog qhov loj dua qhov tom kawg. Yog li ntawd, thaum siv tib yam ntawm ib tug multimeter los ntsuas ob qhov sib txawv voltages, leej twg nyob ze rau tag nrho cov nqi yuav muaj ntau dua. Yog li ntawd, thaum ntsuas qhov ntsuas hluav taws xob, ntsuas qhov ntsuas hluav taws xob yuav tsum tau qhia saum toj 2/3 ntawm lub ntsuas ntsuas qhov ntau. 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 magnetoelectric DC ammeter (microampere meter) 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 ' meter ' tsis tuaj yeem dhau qhov tam sim no loj, yog li qee cov resistors yuav tsum tau txuas nrog nyob rau hauv parallel los yog series ntawm lub taub hau 'meter' kom shunt los yog txo qhov voltage, thiaj li ntsuas qhov tam sim no, voltage thiab kuj nyob rau hauv lub Circuit Court.
