Dab tsi yog qhov zoo ntawm cov multimeters zoo tib yam thiab digital multimeters
Ob qho analog multimeters thiab digital multimeters muaj lawv tus kheej qhov zoo thiab qhov tsis zoo.
Tus pointer multimeter yog qhov nruab nrab meter. Nws muaj ib qho intuitive thiab vivid nyeem ntawv qhia.
(Qhov kev nyeem ntawv dav dav yog ze ze rau lub viav vias lub kaum sab xis ntawm lub pointer, yog li nws yog intuitive heev).
Digital multimeter yog ib qho ntsuas ntsuas ntsuas tam sim. Nws yuav siv ib qho piv txwv ntawm 0.3 vib nas this los tso saib cov txiaj ntsig ntsuas. Qee zaum cov txiaj ntsig ntawm txhua qhov piv txwv zoo sib xws, tsis zoo ib yam. Qhov no tsis yooj yim npaum li tus pointer hom nyeem cov txiaj ntsig.
Feem ntau, tus pointer multimeter tsis muaj amplifier hauv. Yog li ntawd, lub internal kuj yog me me. Piv txwv li, MF-10 hom muaj DC voltage rhiab heev ntawm 100 kΩ / VV
Vim yog kev siv sab hauv ntawm kev ua haujlwm amplifier Circuit Court hauv digital multimeter, qhov kev tiv thaiv sab hauv tuaj yeem ua rau loj heev. Feem ntau nws yog 1M ohms lossis ntau dua. (Qhov ntawd yog, siab dua tuaj yeem tau txais). Qhov no ua rau qhov cuam tshuam ntawm Circuit Court hauv kev sim tuaj yeem ua me me. Kev ntsuas siab dua precision.
Vim qhov me me sab hauv tsis kam ntawm pointer multimeter, thiab siv cov khoom sib cais los ua ib qho shunt thiab voltage divider circuit, cov yam ntxwv zaus tsis sib xws (xws li hom digital). Cov yam ntxwv zaus ntawm tus pointer multimeter kuj zoo dua.
Cov qauv sab hauv ntawm lub pointer multimeter yog qhov yooj yim, yog li tus nqi qis, kev ua haujlwm tsawg dua, kev saib xyuas yooj yim, thiab lub peev xwm overcurrent thiab overvoltage muaj zog.
Ntau yam oscillation, amplification, zaus division, kev tiv thaiv thiab lwm yam circuits yog siv nyob rau hauv lub digital multimeter, yog li nws muaj ntau lub zog, xws li ntsuas kub, zaus (nyob rau hauv ib tug qis ntau), capacitance, inductance, los yog raws li ib tug teeb liab generator, lwm.
Vim hais tias cov qauv sab hauv feem ntau yog sib xyaw ua ke, lub peev xwm dhau los tsis zoo. (Txawm li cas los xij, qee qhov ntawm lawv tuaj yeem hloov lub zog, kev tiv thaiv tsis siv neeg, thiab lwm yam, tab sis kev siv yog qhov nyuaj dua). Tom qab kev puas tsuaj, nws feem ntau tsis yooj yim kho.
Cov zis hluav taws xob ntawm cov digital multimeter yog tsawg (feem ntau tsis ntau tshaj 1 volt). Nws tsis yooj yim rau kev sim qee yam khoom siv nrog cov yam ntxwv tshwj xeeb (xws li thyristors, lub teeb-emitting diodes, thiab lwm yam).
