Kev sib piv ntawm qhov zoo thiab qhov tsis zoo ntawm cov multimeters zoo tib yam thiab digital multimeters:
Ob qho tib si analog thiab digital multimeters muaj qhov zoo thiab qhov tsis zoo.
Tus pointer multimeter yog ib qho ntsuas nruab nrab, uas muaj qhov kev nyeem tau zoo thiab muaj txiaj ntsig. (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).
Ib qho digital multimeter yog qhov ntsuas tam sim ntawd. Nws yuav siv ib qho piv txwv txhua txhua 0.3 vib nas this los tso saib cov txiaj ntsig ntsuas, thiab qee zaum cov txiaj ntsig ntawm txhua qhov piv txwv zoo sib xws, tsis zoo ib yam, uas tsis yooj yim npaum li tus taw tes rau kev nyeem cov txiaj ntsig. Tus pointer multimeter feem ntau tsis muaj lub suab nrov sab hauv, yog li qhov kev tiv thaiv sab hauv me me.
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 1M ohms lossis ntau dua. (piv txwv li qhov siab dua tuaj yeem tau txais). Qhov no ua rau qhov cuam tshuam ntawm Circuit Court nyob rau hauv kev sim yuav me me, thiab qhov ntsuas qhov tseeb yog siab dua.
Vim lub me me nyob rau hauv tsis kam ntawm tus pointer multimeter, discrete Cheebtsam yog feem ntau siv los ua ib tug shunt thiab voltage divider circuit. Yog li, cov yam ntxwv zaus tsis sib xws (piv rau hom digital), thiab cov yam ntxwv zaus ntawm digital multimeter kuj zoo dua.
Cov qauv sab hauv ntawm lub pointer multimeter yog qhov yooj yim, yog li tus nqi qis dua, kev ua haujlwm tsawg dua, kev saib xyuas yooj yim, thiab lub peev xwm overcurrent thiab overvoltage muaj zog.
Digital multimeter siv ntau yam oscillation, amplification, zaus division tiv thaiv thiab lwm yam circuits sab hauv, yog li nws muaj ntau lub zog. Piv txwv li, koj tuaj yeem ntsuas qhov kub thiab txias, zaus (hauv qhov qis), capacitance, inductance, ua lub teeb liab generator, thiab lwm yam.
Txij li cov txheej txheem sab hauv ntawm cov digital multimeter siv cov kev sib txuas sib txuas, lub peev xwm dhau qhov tsis zoo, thiab feem ntau nws tsis yooj yim los kho tom qab kev puas tsuaj. DMMs muaj qhov tso zis tsawg voltages (feem ntau tsis 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). Tus pointer multimeter muaj qhov tso zis ntau dua. Tam sim no kuj loj, thiab nws yooj yim rau kev sim thyristors, lub teeb-emitting diodes, thiab lwm yam.
Ib tug pointer multimeter yuav tsum tau siv rau beginners, thiab ob meters yuav tsum tau siv rau cov tsis pib.
