Kev hloov ntawm qhov ntau ntawm ib qho Analog Multimeter
Feem ntau hais lus, tus pointer multimeter tuaj yeem ntsuas cov khoom xws li voltmeters, resistors, capacitors, inductors, thiab lwm yam. Txhua qhov kev ntsuas kev ua haujlwm (qhov chaw iav) sib haum rau ntau lub zog. Thaum lub sij hawm ntsuas, tus neeg siv yuav tsum tau xaiv thiab teem lub ntau yam ntawm lub multimeter raws li cov kev ntsuas ib puag ncig.
Feem ntau, AC voltage nrhiav hom ntawm tus pointer multimeter muaj ib qho kev xaiv tshwj xeeb. Thaum ntsuas tus nqi tsis kam ntawm multimeter, tus nqi kuj ntawm cov khoom ntsuas yuav tsum tau kwv yees ua ntej, thiab tom qab ntawd qhov tsim nyog yuav tsum tau hloov kho raws li.
1. Iav rau AC voltage nrhiav tau:
Thaum ntsuas AC voltage, xaiv cov iav no. Raws li qhov ntsuas qhov ntsuas hluav taws xob, qhov hloov kho tau yog "0V, 50V, 250V, 500V, 1000V"
2. Capacitance, inductance, decibel nrhiav kom pom thaj tsam:
Xaiv cov iav no thaum ntsuas lub capacitance ntawm capacitors, inductance ntawm inductors, thiab decibel nqi.
3. Resistance seem ntawm pointer multimeter:
Kuj tseem muaj cov kev xaiv tshwj xeeb. Thaum ntsuas tus nqi tsis kam ntawm ib lub multimeter, tus nqi kuj ntawm cov khoom ntsuas yuav tsum tau kwv yees ua ntej, thiab tom qab ntawd qhov tsim nyog yuav tsum tau kho raws li qhov xav tau. Yog tias tus nqi tiv thaiv tsis tuaj yeem kwv yees, feem ntau yog xaiv ntau yam khoom loj dua ua ntej, thiab tom qab ntawd qhov kev ntsuas thawj zaug tau ua tiav. Qhov ntau yog maj mam kho thiab txo raws li qhov taw qhia taw qhia. Feem ntau hais lus, qhov ntau yam xaiv thaum lub pointer ntawm lub multimeter nyob rau hauv nruab nrab ntawm lub dial yog qhov tsim nyog tshaj plaws, thiab qhov ntsuas tus nqi kuj yog qhov tseeb.
3.1 Resistance detection iav (cheeb tsam) Ω:
Thaum ntsuas tus nqi tiv thaiv, xaiv cov iav no. Raws li qhov ntsuas ntsuas tus nqi, qhov kho tau ntau yam yog "* 1, * 10, * 100, * 1K, * 10k"
Nyob rau hauv qhov chaw tiv thaiv kev tiv thaiv ntawm qee qhov multimeters, kuj tseem muaj cov iav cim "Y", uas yog lub buzzer iav feem ntau yog siv los xyuas qhov qhib / tawm ntawm diodes thiab circuits.
3.2 Raws li tus sawv cev resistor, nws tuaj yeem paub tias tus nqi nominal ntawm tus resistor yog 2K Ω ± 5%.
3.3 Raws li tus nqi nominal ntawm tus resistor, qhov ntau ntawm tus pointer multimeter tuaj yeem hloov kho rau "* 1K" ohm ntau yam.
3.4 Nyeem qhov ntsuas qhov tseeb ntawm 2K Ω raws li kev paub ntawm tus taw tes ntawm lub dial thiab cov cim ntsuas sib thooj.
4. Kev kuaj pom iav rau transistor amplification yam:
Nyob rau hauv qhov chaw tiv thaiv kev tiv thaiv ntawm lub pointer multimeter, muaj ib txoj hauj lwm hFE, uas yog siv los ntsuas qhov amplification yam ntawm lub transistor.
Infrared chaw taws teeb tswj xyuas cov iav:
Cov iav no tsuas yog siv los txheeb xyuas cov emitter infrared. Thaum qhov kev ua haujlwm tig mus rau lub iav no, siv lub taub hau ntawm lub emitter ntawm lub infrared emitter mus rau vertically ua ke nrog infrared chaw taws teeb tswj nyob rau hauv lub dial mus ntes lub iav, thiab nias lub hwj chim khawm ntawm lub chaw taws teeb tswj. Yog hais tias lub teeb liab -emitting diode (GOOD) flashes, nws qhia tau hais tias lub infrared emitter ua hauj lwm ib txwm
DC tam sim no nrhiav pom iav:
Thaum ntsuas DC tam sim no, xaiv cov iav no. Raws li ntsuas tus nqi tam sim no, qhov hloov kho tau yog "0.05mA, 0.5mA, 5mA, 50mA, 500mA, 5A"
DC voltage nrhiav pom iav:
Thaum ntsuas DC voltage, xaiv cov iav no. Raws li qhov ntsuas qhov ntsuas hluav taws xob, qhov hloov kho tau yog "0.25V, 1V, 2.5V, 10V, 50V, 250V, 500V, 1000V"
