Sib piv cov txiaj ntsig thiab qhov tsis zoo ntawm analog thiab digital multimeters
Sib piv cov txiaj ntsig thiab qhov tsis zoo ntawm cov pa thiab digital multimeters
Multimeters, ob qho tib si digital thiab analog, muaj qhov zoo thiab qhov tsis zoo.
Lub multimeter nrog ib tus pointer yog ib qho 'meter'. Nws suav nrog qhov qhia meej thiab ncaj nraim nyeem ntawv.
Nws yog qhov yooj yim heev vim tias qhov kev nyeem ntawv dav dav muaj feem cuam tshuam nrog lub pointer lub viav vias lub kaum sab xis.
Ib qho cuab yeej rau kev kuaj tam sim yog digital multimeter. Cov zaub ntawm qhov ntsuas ntsuas yuav siv sij hawm ib qho piv txwv ntawm 0.3 vib nas this. Qee lub sij hawm, txawm tias tsis yog ib txwm zoo ib yam, qhov kev tshawb pom ntawm txhua qhov piv txwv zoo sib xws. Qhov no tsis tshua muaj txiaj ntsig rau kev nyeem cov txiaj ntsig ntau dua li hom pointer.
Feem ntau, tsis muaj amplifier hauv lub pointer multimeter. Raws li qhov tshwm sim, muaj qhov tsis kam sab hauv. MF-10 hom, piv txwv li, muaj DC voltage rhiab heev ntawm 100 k/V.
Kev ua haujlwm amplifier Circuit Court hauv digital multimeter tuaj yeem siv sab hauv, uas tso cai rau kev ua haujlwm sab hauv siab heev. Feem ntau, nws yog 1M ohms lossis siab dua. Siab rhiab heev tuaj yeem ncav cuag, hauv lwm lo lus. Raws li qhov tshwm sim, qhov cuam tshuam ntawm qhov ntsuas hluav taws xob yuav raug txo qis. Kev ntsuas siab dua.
Cov yam ntxwv zaus ntawm tus pointer multimeter (piv rau cov hom digital) yog qhov tsis sib xws vim qhov sib txawv ntawm cov khoom siv sab hauv thiab kev siv cov khoom sib cais los tsim kom muaj qhov sib faib hluav taws xob thiab shunt circuit. Tus pointer multimeter muaj qhov sib piv zoo dua cov yam ntxwv.
Tus pointer multimeter tus qauv sab hauv yog ncaj nraim, uas ua rau cov nqi pheej yig, muaj nuj nqi tsawg, kev saib xyuas yooj yim, thiab muaj zog overcurrent thiab overvoltage muaj peev xwm.
Lub tshuab hluav taws xob digital yuav ua tau ntau yam haujlwm, suav nrog ntsuas qhov ntsuas kub, zaus (hauv qhov qis dua), muaj peev xwm, inductance, lossis ua lub teeb liab generator. Nws ua qhov no los ntawm kev siv ntau yam oscillation, amplification, zaus faib, thiab tiv thaiv circuits.
Kev tsim kho sab hauv, uas feem ntau yog ua los ntawm kev sib xyaw ua ke, ua rau muaj peev xwm tsis muaj zog tshaj. (Txawm li cas los xij, qee qhov ntawm lawv muaj qhov tsis siv neeg gearshifts, kev tiv thaiv tsis siv neeg, thiab lwm yam, tab sis kev siv nyuaj dua. Kev kho kev puas tsuaj feem ntau nyuaj.
Cov multimeter digital muaj qhov tso zis tsawg tsawg (feem ntau tsawg dua 1 volt). Kev sim qee qhov chaw nrog cov yam ntxwv tshwj xeeb, suav nrog thyristors thiab lub teeb-emitting diodes, yog cumbersome.
Cov zis voltage ntawm tus pointer multimeter yog siab dua (10.5 volts, 12 volts, thiab lwm yam).
Qhov tam sim no kuj tseem ceeb (MF-500*1 European iav, piv txwv li, muaj qhov siab tshaj plaws ntawm kwv yees li 100 mA), ua rau nws yooj yim rau kev sim thyristors, LEDs, thiab lwm yam khoom siv hluav taws xob.
Rau beginners yuav tsum tau siv ib tug pointer multimeter.
Rau cov tsis pib, ob lub ntsuas yuav tsum tau siv.
