Kev xaiv ntau yam thiab ntsuas qhov yuam kev ntawm Digital Universal Electric Barrier
Txhua qhov kev cuam tshuam hluav taws xob tuaj yeem ntsuas qhov ntsuas tus nqi ntawm 0 mus rau ∞. Qhov ntsuas ntawm ohmmeter yog qhov tsis-linear, tsis sib npaug ntawm qhov ntsuas.
Qhia raws li feem pua ntawm tus pas ntsuas qhov ntev arc. Thiab qhov kev tiv thaiv sab hauv ntawm txhua qhov sib npaug yog sib npaug rau qhov nruab nrab ntawm qhov ntev ntawm qhov ntsuas qhov sib npaug ntawm qhov sib npaug, uas yog hu ua "center resistance".
Thaum qhov ntsuas tsis kam yog sib npaug rau qhov nruab nrab tsis kam ntawm qhov kev xaiv, qhov tam sim no ntws hauv Circuit Court yog ib nrab ntawm qhov ntsuas tam sim no.
Cov ntsiab lus pointer nyob rau hauv nruab nrab ntawm lub teev. Nws qhov tseeb yog qhia raws li:
R feem pua =(△R/center resistance) × 100 feem pua ……2
(1) Thaum ntsuas tib qhov kev tiv thaiv nrog multimeter, qhov yuam kev tshwm sim los ntawm kev xaiv ntau yam sib txawv. Hluav taws xob: www.dgjs123.com
Piv txwv li: MF{{0}} hom multimeter, lub hauv paus tsis kam ntawm Rxl0 thaiv yog 250Ω; lub hauv paus tsis kam ntawm R × l 00 thaiv yog 2.5kΩ.
Qhov ntsuas qhov tseeb yog 2.5. Siv nws los ntsuas tus qauv tsis kam ntawm 500Ω, thiab nug R × 10 thaiv thiab R × 100 thaiv los ntsuas, uas muaj qhov yuam kev loj tshaj plaws? Kev daws: Los ntawm formula 2, peb tau txais:
Qhov siab tshaj plaws qhov yuam kev ntawm R × l 0 thaiv △R (10) =center resistance × R feem pua =250Ω × (± 2.5) feem pua =± 6.25Ω .
Siv nws los ntsuas 500Ω tus qauv tsis kam, qhov taw qhia tus nqi ntawm 500Ω tus qauv tsis kam yog nyob nruab nrab ntawm 493.75Ω-506.25Ω. Qhov siab tshaj qhov txheeb ze yuam kev yog: ± 6.25÷500Ω × 100 feem pua =± 1.25 feem pua.
Qhov siab tshaj qhov yuam kev ntawm R × l 00 thaiv △R (100) =center resistance × R feem pua 2.5kΩ × (± 2.5) feem pua =± 62.5Ω.
Siv nws los ntsuas 500Ω tus qauv tsis kam, qhov taw qhia tus nqi ntawm 500Ω tus qauv tsis kam yog nyob nruab nrab ntawm 437.5Ω-562.5Ω. Qhov siab tshaj qhov txheeb ze yuam kev yog: ± 62.5÷500Ω × 100 feem pua =± 10.5 feem pua.
Kev sib piv ntawm cov txiaj ntsig ntawm kev suav qhia tau hais tias qhov tsis raug tsim los ntawm kev ntsuas yog qhov sib txawv heev thaum xaiv qhov sib txawv ntawm qhov sib txawv.
Yog li ntawd, thaum xaiv lub iav ntau yam, sim ua kom ntsuas qhov ntsuas qhov ntsuas nyob hauv nruab nrab ntawm qhov ntev ntawm qhov ntsuas qhov ntsuas. Qhov ntsuas qhov tseeb yuav siab dua.
