Cov lus qhia tseem ceeb rau kev kuaj lub peev xwm capacitors nrog tus multimeter
1. Ntsuas ncaj qha siv hom capacitance
Some digital multimeters have the function of measuring capacitance, and their ranges are divided into five levels: 2000p, 20n, 200n, 2 μ, and 20 μ. Thaum ntsuas cov pins, ob lub pins ntawm cov tshuaj tua hluav taws xob tuaj yeem tso rau tom qab ntsuas cov ntaub ntawv ntawm lub cx) (thiab cov ntaub ntawv tso tawm rau ntawm lub ntsuas phoo uas tsim nyog, haum rau kev ntsuas capacitors tsawg dua 2000pf; 20n ntau, haum rau kev ntsuas ntsuas hluav taws xob ntawm 2000pf thiab 20nf; 200n ntau, haum rau kev ntsuas ntsuas ntawm 20NF thiab 200nf; 2 μ qib, haum rau kev ntsuas kev nyab xeeb ntawm 200NF thiab 2 μ f; 20 μ f yog rau kev ntsuas ntsuas ntawm 2 μ f thiab 20 μ F.
Kev paub tau qhia tias qee tus qauv ntawm cov qauv digital (xws li DT890B +) ntsuas qhov tseem ceeb hauv qab 50 hauv qab 20pf muaj yuav luag tsis muaj tus nqi siv. Txij ntawm no, txoj hau kev ntawm series tuaj yeem siv los ntsuas cov peev txheej me me. Cov txheej txheem yog thawj zaug pom lub capacitor nrog lub peev xwm ntawm 220pf, ntsuas nws lub vijtsam me me tau sim nrog nws kom ntsuas nws tag nrho cov peev txheej C2. Qhov sib txawv ntawm ob (C1-C2) yog lub peev xwm ntawm lub vijtsam me me tau sim. Hom no yog qhov tseeb heev rau kev ntsuas qhov ntsuas me me ntawm 1-20pf.
2. Ntsuas nrog hom tawm tsam
Kev xyaum tau ua pov thawj tias tus txheej txheem them nyiaj tuaj yeem siv tau siv cov kev hloov pauv digital nyob rau hauv discrete digital cov digital. Yog tias ntsuas ntsuas ntawm cov digital multimeter yog n lub sij hawm ib ob, tom qab ntawd thaum lub sij hawm saib xyuas kev nyeem ntawv ntxiv tuaj yeem pom txhua thib ob. Raws li cov zaub muaj txiaj ntsig ntawm cov digital motimeter, nws muaj peev xwm kuaj tau qhov zoo ntawm capacitors thiab kwv yees qhov loj me ntawm lawv lub peev xwm. Cov hauv qab no yog ib txoj kev siv cov digital mottimeter los tshawb xyuas capacitors nyob rau hauv lub tswv yim muaj ntau, uas yog ntawm cov tswv yim tswv yim rau cov khoom uas tsis tau teeb tsa lub peev xwm capactrance. Hom no yog haum rau ntsuas qhov muaj peev xwm loj muaj peev xwm capacitors li 0.1 μ f rau ntau txhiab microflars.
Teeb cov digital multiat rau qhov tsim nyog kuj ntau, nrog cov liab thiab dub petes txwv ob tug ncej ntawm cov twj xeem capacitor CX. Txij ntawm no, tus nqi qhia pom yuav maj mam nce ntawm "000" kom txog rau thaum lub cim txeej "1" raug tso tawm. Yog hais tias "000" yog xwm yeem tso tawm, nws qhia tau ib qho kev sib nrug sab hauv luv luv hauv lub capacitor; Yog tias txeej yog xwm yeem tshwm sim, nws yuav yog vim qhib cercuit Court ntawm tus ncej, lossis nws yuav yog qib tsis tsim nyog xaiv. Thaum kuaj xyuas electrolytic cape, nws yog ib qho tseem ceeb kom nco ntsoov) yuav tsum txuas nrog lub zog ntawm lub capacitor, thiab qhov kev sojntsuam dub yuav tsum txuas nrog qhov tsis zoo ntawm lub capacitor.
