Qhov zoo ntawm kev siv cov pa multimeter thiab digital multimeter
Lub analog multimeter yog ib qho nruab nrab meter. Nws muaj ib qho intuitive thiab vivid nyeem ntawv qhia.
Digital multimeter yog ib qho kev ntsuas tam sim no. Nws yuav siv ib qho piv txwv txhua 0.3 vib nas this los tso saib cov txiaj ntsig ntsuas. Qee zaum cov txiaj ntsig ntawm txhua qhov piv txwv tsuas yog zoo sib xws, tsis zoo ib yam. Qhov no tsis yooj yim npaum li tus pointer hom nyeem cov txiaj ntsig.
Pointer multimeters feem ntau tsis muaj lub amplifier sab hauv, yog li qhov kev tiv thaiv sab hauv me me. Piv txwv li, MF-10 hom muaj DC voltage rhiab heev ntawm 100 kiloohms / volt, uas yog qhov zoo heev. Hom MF-500 muaj DC voltage rhiab heev ntawm 20 kiloohms/volt. hluav taws xob.
Vim tias cov multimeter digital siv lub tshuab hluav taws xob ua haujlwm sab hauv, qhov kev tiv thaiv sab hauv tuaj yeem ua tau loj heev, feem ntau 1M ohm lossis ntau dua (uas yog, qhov siab dua tuaj yeem tau txais). Qhov no ua rau qhov cuam tshuam ntawm Circuit Court nyob rau hauv kev sim me me. Qhov tseeb yog siab dua.
Vim tias qhov kev tiv thaiv sab hauv ntawm analog multimeter yog me me, thiab cov khoom sib cais feem ntau yog siv los ua ib qho hluav taws xob thiab hluav taws xob faib hluav taws xob, cov yam ntxwv zaus tsis sib xws (piv rau cov digital). Cov yam ntxwv zaus ntawm analog multimeter kuj zoo dua.
Cov qauv sab hauv ntawm analog multimeter yog qhov yooj yim, yog li tus nqi qis dua. Nws muaj kev ua haujlwm tsawg dua, kev saib xyuas yooj yim, thiab muaj zog overcurrent thiab overvoltage peev xwm.
Cov multimeter digital siv ntau yam oscillation, amplification, zaus faib, tiv thaiv thiab lwm yam circuits sab hauv, yog li nws muaj ntau yam haujlwm. Piv txwv li, nws tuaj yeem ntsuas qhov kub thiab txias, zaus (hauv qhov qis), capacitance, inductance, lossis ua lub teeb liab generator, thiab lwm yam.
Txij li cov qauv sab hauv feem ntau siv cov kev sib xyaw ua ke, lub peev xwm dhau los tsis zoo. (Txawm li cas los xij, qee qhov tam sim no muaj kev hloov pauv hloov pauv tsis siv neeg, kev tiv thaiv tsis siv neeg, thiab lwm yam, tab sis lawv siv tau yooj yim dua). Nws feem ntau tsis yooj yim kho tom qab kev puas tsuaj.
Cov zis hluav taws xob ntawm 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).
