Yuav ua li cas ntsuas tsis kam nrog ib tug multimeter thiab nyeem tus nqi kuj
Thaum kho cov khoom siv hluav taws xob hauv hluav taws xob, cov khoom tiv thaiv hluav taws xob ntawm lub rooj tsav xwm hluav taws xob muaj txog li 50 feem pua ntawm tag nrho cov khoom hluav taws xob. Yog hais tias lub Circuit Court yog faulty, lub resistive Cheebtsam yog ib qho ntawm cov khoom uas peb yuav tsum tau ntsuas.
Yog li yuav ua li cas ntsuas qhov tsis kam nrog lub multimeter thiab nyeem tus nqi tsis kam? Cia kuv qhia koj txog qhov teeb meem no. Ua ntej ntsuas qhov tsis kam, peb yuav zoo dua ua ob xoom-hloov ua haujlwm, ib qho yog qhov kev hloov kho xoom-kho ntawm pointer multimeter; Qhov thib ob yog ohm xoom-hloov kho. Tom qab ua tiav ob kauj ruam no, koj tuaj yeem xaiv cov ntaub ntawv sib npaug uas tsim nyog rau kev ntsuas kev tiv thaiv. Txij li cov nplai ntawm cov ntaub ntawv tsis sib haum ntawm multimeter yog qhov tsis sib xws, nws yog qhov zoo tshaj kom khaws cov pointer scale ntawm qhov sib txawv ntawm qhov ntsuas thaum xaiv cov ntaub ntawv multiplier. , thiab qhov ze ntawm tus pointer yog mus rau nruab nrab txoj hauj lwm ntawm lub teev, qhov tseeb nws yog. Kuv xav tias nws yog qhov zoo tshaj kom tus taw tes taw qhia ntawm 1/3 txog 2/3 ntawm qhov ntsuas.
Kev nyeem ntawv
Cov txheej txheem ntawm kev nyeem ntawv multimeter tsis nyuaj, uas yog, kev nyeem ntawv ntawm lub taub hau ntawm lub 'meter' yog raws li qhov kev nthuav dav, uas yog, tus nqi ntawm qhov ntsuas tsis kam. Piv txwv li, yog hais tias tus nqi kuj ntawm ib tug resistor yog 47 ohms, ces kho qhov ntau ntawm ohm ntau ntawm "Rx10". Lub sijhawm no, tus pointer ntawm multimeter taw qhia rau txoj haujlwm ntawm 4.7, thiab qhov kawg nyeem ntawv yog 4.7x10, uas yog 47 ohms. Yog tias koj ntsuas qhov kev tiv thaiv loj, koj tuaj yeem xaiv qhov kev tiv thaiv loj dua, xws li Rx1k lossis Rx10K, thiab cov txheej txheem rau kev nyeem cov nqi kuj yog tib yam.
