Tus ua hauj lwm ua haujlwm ntawm kev ntsuas tiv thaiv nrog tus multimeter
Lub hauv paus ntsiab lus ntawm kev ntsuas kev ntsuas nrog qhov kev sib ntxiv yog ua tau raws OHM txoj cai. Qhov voltage ntawm multimeter yog qhov hluav taws xob ntawm lub roj teeb, thiab nws muaj ntau qhov tsis kam, suav nrog kev tawm tsam ntawm cov iav sib txawv raws li cov iav), thiab nws cov kev tsis kam. Thiab cov tam sim no tau suav thaum peb sim tiv thaiv yog xoom. Yog li peb tuaj txog nrog tus qauv: Kuv=u / (rg- rgment) u yog qhov txawv txav Thaum ntsuas kev tawm tsam rx =0, tam sim no nyob rau hauv Circuit Court yog qhov siab tshaj plaws. Kho R kom deflection lub kaum sab xis ntawm ntsuas ntsuas ntsuas ntsuas lub ntsej muag tag nrho- nplai tus nqi. Lub sijhawm no, tus nqi tam sim no i0 hauv Circuit Court yog E / R. Raws li cov ntsuas tawm tsam RX nce, tam sim no kuv= e}} e / (R + E / (R + E / (R + E / (R + E / (R + lub kaum sab xis ntawm tus pointer tseem txo qis.
Yog li ntawd, cov nqi tiv thaiv qhov ntsuas ntawm lub xov tooj ntawm pultimeter yog thim rov qab thiab cov nplai tsis xwm yeem. Yog tias ntsuas kev tawm tsam Rx=i} Kuv {} i0 / 2, thiab lub sepleter deflection yog ib nrab ntawm tag nrho deflect lub kaum sab xis. Yog li ntawd, tus nqi tiv thaiv tau cim rau ntawm nruab nrab ntawm cov nplai (raug xa mus ua cov nqi nruab nrab) yog qhov muaj nuj nqis hauv nruab nrab ntawm cov ntau. Kev nyeem tau zoo ntawm cov nplai tiv thaiv feem ntau yog 0.1 txog 10 zaug ntawm cov nqi nruab nrab tus nqi.
Qhov peb cov kauj ruam tseem ceeb ntawm kev ntsuas kev ntsuas nrog tus multimeter
1. Lub multimeter peb siv muaj ib lub taub hau dav hlau rau kev ntsuas voltage, tam sim no, thiab kev tawm tsam. Thaum ntsuas kev tiv thaiv, peb ua ntej yuav tsum tau teeb tsa nws mus rau Ohm ntau. Feem ntau, muaj ob peb lub zog: x1, x10, x 7, x1000.
2. Yog hais tias tus taw qhia ntawm lub ntsuas dej lossis (thaum lub thib ob ntawm cov digital pallider, nyeem ntawv tsis xoom) ua ntej ntsuas kev ntsuas, nws yuav ua rau xoom yuam kev hauv kev nyeem ntawv. Yog tias peb pom tias nws tsis tau rov pib dua rau xoom ua ntej kev sim, peb yuav tsum xub kho nws mus rau xoom. Cov qauv yog raws li hauv qab no:
3. Xaiv magnification
Siv ib qho ntau ntau los ntsuas kev ntsuas tsis kam nrog kev tawm tsam qhov tseeb, nws yog ib qho tsim nyog los tso rau nruab nrab ntawm lub xov tooj, yog li nws yog ib qho tsim nyog los xaiv lub magnification zoo. Yog tias pulul analimeter tsis muaj 10k coteripier iav, qhov chaw ze tshaj plaws tuaj yeem raug xaiv.
