Yuav ua li cas xaiv Multatataus yog thiab tiv thaiv kev ntsuas tsis yog
Qhov tseeb qib ntawm kev sib raug zoo yog feem ntau muab faib ua cov feem pua ntawm lawv qhov kev tso cai tshaj plaws uas tau xaiv tag nrho {{5 5}} teev tus nqi. Qhia nyob rau hauv cov mis: ib% {{{{{{} (△ x / tas nrho {{8% {10} {10}... 1
(1) Siv multimeters nrog cov kev sib txawv los ntsuas qhov ua yuam kev los ntawm tib voltage
Piv txwv li, yog tias muaj 10V qauv hluav taws xob thiab ob multimeters nrog 100v iav, 0.5 qib thiab 15v iav, uas ib qib twg muaj qhov ntsuas me tshaj?
Kev daws: Los ntawm kab zauv 1: block 'ntsuas ntsuas: loj tso cai yuam kev
△ X1=± 0.5% × 100V=± 0.50V.
** block 'block ntsuas ntsuas:
△ X2=± 2.5% × l5V=± 0.375V.
Sib piv △ X1 thiab △ x2, nws tuaj yeem pom tau tias qhov tseeb ntawm cov lus thaiv yog siab dua li qhov ntsuas nrog qhov ntsuas nrog ntsuas nrog cov lus thaiv. Yog li ntawd, nws tuaj yeem pom tau tias thaum xaiv qhov tseeb ntau, zoo dua tsis tas yuav tsum zoo dua. Nrog rau qhov tseeb heev rau motimeter heev, nws tseem tsim nyog los xaiv ib qho kev haum. Tsuas yog xaiv los ntawm kev xaiv qhov tseeb tau tuaj yeem yog qhov muaj peev xwm ntawm kev sib sau ua ke.
(2) Qhov yuam kev tshwm sim los ntawm kev ntsuas qhov sib piv ntawm cov hluav taws xob sib txawv nrog ntau ntau
Piv txwv li, mf-30 motiveter muaj qib raug ntawm 2.5. Thaum ntsuas cov qauv hluav taws xob ntawm 23V siv 100V lossis 25V lossis 25V lossis 25V lossis 25V lossis 25V lossis 25V lossis 25V lossis 25V lossis 25V lossis 25V lossis 25V lossis 25V lossis 25V lossis 25V lossis lub iav uas iav muaj qhov yuam kev me tshaj?
Kev daws: 100v iav cov khoom loj tso cai yuam kev:
X (100)=± 2.5% × 100V=± 2.5V.
25V iav qhov loj tso cai ua yuam kev: △ x (25)= ± 2.5% × 25} {5} ± 0.625V. Raws li tuaj yeem pom los ntawm cov kev daws teeb meem saum toj no:
Ntsuas cov qauv hluav taws xob ntawm 23V nrog 100v iav, thiab nyeem rau ntawm multimeter yog nruab nrab ntawm 20.5v thiab 25.5v. Ntsuas cov 23V qauv hluav taws xob nrog 25v iav, thiab kev nyeem rau ntawm multimeter yog nruab nrab ntawm 22.375v-23.625V. Los ntawm cov txiaj ntsig saum toj no, nws tuaj yeem pom tias △ x (100) ntau dua △ (25), qhia tau ntau dua △ (25), qhia tias qhov ntsuas tsis raug ntawm 100v iav ntau dua li ntawm 25v iav. Yog li ntawd, thaum ntsuas ntsuas sib txawv voltages nrog motionsatals nrog rau kev ntsuas kom paub los ntawm kev ntsuas nrog kev sib txawv nrog cov sib txawv. Thaum ntsib tus nqi ntawm cov teeb liab ntsuas, nws raug nquahu kom xaiv cov zog nrog cov khoom me me kom ntau li ntau tau. Qhov no tuaj yeem txhim kho qhov ntsuas qhov tseeb.
