Kev taw qhia txog digital multimeter qhov kev daws teeb meem
Tus nqi hluav taws xob sib raug rau tus lej kawg ntawm cov digital multimeter ntawm qhov qis tshaj qhov voltage yog hu ua kev daws teeb meem, uas qhia txog qhov rhiab heev ntawm lub 'meter'. Qhov kev daws teeb meem ntawm cov cuab yeej digital digital nce nrog kev nce ntawm cov lej tso saib. Cov kev daws teeb meem siab tshaj plaws uas digital multimeters nrog cov lej sib txawv tuaj yeem ua tiav yog qhov sib txawv.
Qhov kev daws teeb meem ntawm digital multimeter kuj tuaj yeem pom los ntawm kev daws teeb meem. Kev daws teeb meem yog qhov feem pua ntawm tus lej tsawg tshaj plaws (tshwj tsis yog xoom) uas lub ntsuas ntsuas tuaj yeem tso rau tus lej loj tshaj plaws.
Nws yuav tsum tau taw qhia tias qhov kev daws teeb meem thiab qhov tseeb yog ob lub ntsiab lus sib txawv. Tus qub cim qhov "rhiab heev" ntawm qhov ntsuas, uas yog, muaj peev xwm "paub" me me voltages; qhov tom kawg qhia txog qhov "qhov tseeb" ntawm kev ntsuas, uas yog, qib ntawm qhov sib xws ntawm qhov ntsuas qhov ntsuas thiab qhov tseeb tus nqi. Tsis muaj kev sib txuas tsim nyog ntawm ob, yog li lawv tsis tuaj yeem tsis meej pem, thiab kev daws teeb meem (lossis kev daws teeb meem) yuav tsum tsis txhob yuam kev rau qhov zoo sib xws. Qhov tseeb yog nyob ntawm qhov kev ua yuam kev loj thiab qhov yuam kev quantization ntawm lub internal A/D converter thiab functional converter ntawm lub ntsuas. Los ntawm qhov kev xav ntawm kev ntsuas, kev daws teeb meem yog qhov ntsuas "virtual" (uas tsis muaj dab tsi cuam tshuam nrog kev ntsuas qhov yuam kev), thiab qhov tseeb yog qhov ntsuas "tiag tiag" (nws txiav txim siab qhov loj ntawm kev ntsuas qhov yuam kev). Yog li ntawd, nws tsis muaj peev xwm ua kom cov naj npawb ntawm cov lej tso saib kom txhim kho qhov kev daws teeb meem ntawm qhov ntsuas.
