Qhov zoo thiab qhov tsis zoo ntawm cov pa multimeter thiab digital multimeter yog raws li hauv qab no
Lub pointer multimeter yog qhov ntsuas nruab nrab. Nws muaj intuitive. Visual indications ntawm kev nyeem ntawv.
(Kev nyeem ntawv dav dav yog ze ze rau lub kaum sab xis ntawm lub viav vias ntawm tus taw tes, yog li nws yog qhov yooj yim heev).
Digital multimeter yog ib qho cuab yeej tam sim no. Nws siv 0.3 vib nas this los coj tus qauv los tso saib cov txiaj ntsig ntsuas. Qee zaum cov txiaj ntsig ntawm txhua tus qauv tsuas yog zoo sib xws. Tsis yog tib yam nkaus. Qhov no tsis yooj yim rau kev nyeem cov txiaj ntsig raws li hom pointer.
Pointer multimeters feem ntau tsis muaj lub suab nrov sab hauv. Yog li ntawd lub internal kuj yog me me. Piv txwv li, MF-10 muaj DC voltage rhiab heev ntawm 100 kilohms/volt. MF-500 muaj DC voltage rhiab heev ntawm 20 kilohms/volt.
Digital multimeters muaj ib qho op amp Circuit Court. Internal kuj yuav ua tau loj heev. Feem ntau hauv 1M ohms lossis ntau dua. (Qhov ntawd yog, koj tuaj yeem tau txais kev nkag siab ntau dua). Qhov no ua rau qhov cuam tshuam ntawm qhov ntsuas hluav taws xob tuaj yeem ua rau me me. Kev ntsuas qhov tseeb dua.
Pointer multimeter vim qhov me me sab hauv tsis kam, thiab ntau qhov sib cais los ua ib qho shunt thiab voltage divider circuit. Yog li cov yam ntxwv zaus tsis sib xws (xws li digital). Cov yam ntxwv zaus ntawm tus pointer multimeter yog qhov zoo.
Pointer multimeter internal qauv yog yooj yim yog li tus nqi qis. Tsawg dua ua haujlwm. Kev saib xyuas yooj yim. Muaj zog overcurrent thiab overvoltage muaj peev xwm.
Digital multimeter sab hauv siv ntau yam oscillation, amplification. Kev faib ntau zaus. Kev tiv thaiv circuitry thiaj li muaj nuj nqi ntau, xws li ntsuas kub. Ntau zaus (nyob rau hauv qis qis). Capacitance, inductance. Los yog raws li lub teeb liab generator thiab lwm yam.
Vim yog cov qauv sab hauv ntawm ntau qhov sib xyaw ua ke, yog li lub peev xwm dhau los tsis zoo. (Tab sis tam sim no ib txhia tau tuaj yeem hloov lub zog. Tsis siv neeg tiv thaiv. Tab sis kev siv ntau dua). Kev puas tsuaj feem ntau tsis yooj yim kho.
Digital multimeter tso zis voltage tsawg (feem ntau tsis ntau tshaj 1 volt). Rau qee qhov tshwj xeeb voltage yam ntxwv ntawm cov khoom ntawm qhov kev sim tsis yooj yim (xws li, silicon tswj, lub teeb-emitting diodes, thiab lwm yam).
Pointer multimeter tso zis voltage ntau dua, (10.5 volts, 12 volts, thiab lwm yam).
Tam sim no kuj loj (xws li MF-500 * 1 ohm iav qhov siab tshaj plaws ntawm 100 mA los yog li ntawd) tuaj yeem yooj yim rau kev sim SCR, lub teeb-emitting diodes thiab lwm yam.
