Yuav ua li cas ntsuas tam sim no nrog digital multimeter
Xaiv ntau yam: Multimeter's DC tam sim no ntau yam yog cim nrog "mA" thiab muaj peb yam: 1mA, 10mA, thiab 100mA. Kev xaiv ntawm qhov ntau yuav tsum yog nyob ntawm qhov tam sim no hauv Circuit Court.
1. Xaiv qhov ntau: DC tam sim no ntau yam ntawm multimeter yog cim nrog "mA" thiab muaj peb qhov sib txawv ntawm 1mA, 10mA thiab 100mA. Kev xaiv ntawm qhov ntau yuav tsum yog nyob ntawm qhov tam sim no hauv Circuit Court. Yog tias qhov loj me tam sim no tsis paub, qhov siab tshaj plaws yuav tsum raug xaiv.
2. Kev ntsuas txoj kev: Lub multimeter yuav tsum tau txuas nrog hauv series nrog lub voj voog nyob rau hauv kev sim. Tom qab qhov sib thooj ntawm lub Circuit Court yuav tsum raug txiav, txuas lub multimeter test coj mus rau ob qhov kawg ntawm qhov tawg. Cov hlau lead kuaj liab yuav tsum tau txuas nrog lub breakpoint txuas nrog tus ncej zoo ntawm lub hwj huam mov, thiab cov hlau lead kuaj dub yuav tsum tau txuas nrog lub breakpoint txuas nrog rau tus ncej tsis zoo ntawm lub hwj huam mov.
1) Txuas lub voj voog ua kom lub teeb LED ib txwm muaj.
2) Npaj lub multimeter raws li qhov yuav tsum tau ua ua ntej siv thiab teeb tsa tus xaiv hloov mus rau mA ntau ntawm 100mA.
3) Tshem tawm cov hlau lead ntawm qhov nruab nrab ntawm lub potentiometer thiab qhov tsis zoo ntawm lub teeb-emitting diode los tsim ib qho "breakpoint". Lub sijhawm no, lub teeb-emitting diode tawm mus.
4) Txuas lub multimeter nyob rau hauv series ntawm breakpoint. Cov hlau kuaj liab txuas nrog rau qhov tsis zoo electrode ntawm lub teeb-emitting diode, thiab cov hlau kuaj dub txuas nrog rau qhov nruab nrab ntawm cov hlau lead ntawm potentiometer. Lub sijhawm no, lub teeb-emitting diodes rov ua dua. Tus nqi ntsuas taw qhia los ntawm tus pointer ntawm multimeter yog tus nqi tam sim no dhau los ntawm lub teeb-emitting diode.
5) Ua kom raug nyeem tus nqi tam sim no los ntawm LED.
Cov ntaub ntawv: Tam sim no los ntawm LED yog xx mA.
6) Tig lub potentiometer kov los soj ntsuam qhov kev hloov pauv ntawm tus pointer ntawm multimeter thiab qhov kev hloov ntawm qhov ci ntawm lub teeb-emitting diode. Nws tuaj yeem pom tau tias: Cov ntaub ntawv: Qhov siab tshaj plaws tam sim no dhau los ntawm lub teeb-emitting diode yog xx mA. Tam sim no yam tsawg kawg nkaus yog xx mA.
Los ntawm cov haujlwm saum toj no, peb tuaj yeem nkag siab ntxiv txog lub luag haujlwm ntawm cov resistors hauv circuits.
7) Tom qab kev ntsuas tiav, tshem tawm cov khoom siv hluav taws xob thiab khaws cov multimeter raws li qhov xav tau.
