Dab tsi yog cov txheej txheem kev ntsuas thiab ntsuas txoj hauv kev ntawm digital multimeter?
1, kev daws teeb meem, tus lej ntawm cov lus thiab cov khoom
Kev daws teeb meem yog hais txog kev daws teeb meem ntawm cov teeb liab me me thaum ntsuas nrog multimeter. Paub txog qhov kev daws teeb meem ntawm multimeter tuaj yeem txiav txim siab seb nws puas tuaj yeem soj ntsuam qhov kev hloov me me ntawm cov teeb liab ntsuas. Piv txwv li, yog tias qhov kev daws teeb meem ntawm digital multimeter yog 1mV hauv 4V ntau, nws txhais tau tias nws tuaj yeem soj ntsuam qhov kev hloov ntawm 1mV (1/1000 V) thaum nyeem 1V.
Yog tias koj yuav tsum ntsuas qhov tsawg kawg nkaus ntawm 1/4 nti (los yog 1 hli), ces koj yuav tsis yuav tus pas ntsuas qhov tsawg kawg nkaus ntawm 1 nti (los yog 1 cm). Yog tias qhov ntsuas kub ib txwm yog 98.6 degrees Fahrenheit, tus pas ntsuas kub uas ntsuas tau tag nrho cov degrees tsuas yog siv tsawg. Koj xav tau tus pas ntsuas kub nrog qhov kev daws teeb meem ntawm 0.1 degrees.
Cov lus "ntsis" thiab "lo lus" yog siv los piav qhia txog kev daws teeb meem ntawm multimeter. Lawv tuaj yeem muab faib ua pawg raws li tus lej ntawm cov lus lossis tus lej tso tawm los ntawm digital multimeter.
Ib tus {{0}} tus lej multimeter tuaj yeem tso saib peb tus lej tag nrho (0 txog 9) thiab "ib nrab tus lej" (tsuas yog "1" tshwm sim lossis sab laug). Cov zaub daws teeb meem ntawm 3-digit multimeter yog 1,999 lo lus siab dua. Cov zaub daws teeb meem ntawm 4- lej multimeter yog siab li 19,999 lo lus. Piv nrog "ntsis", siv "lo lus" tuaj yeem piav qhia qhov kev ntxub ntxaug ntawm multimeter ntau dua. Qhov kev daws teeb meem tam sim no ntawm 3- lej multimeter yuav siab li 3,200, 4,{14}} lossis 6,000 lo lus.
Rau qee qhov kev ntsuas, 3,200-lo lus multimeter tuaj yeem muab kev daws teeb meem zoo dua. Piv txwv li, yog tias qhov voltage ntawm 200V lossis siab dua yuav tsum ntsuas, 1,999- lo lus multimeter tsis tuaj yeem ntsuas 0.1V V.. Thaum lub 3,200 multimeter tuaj yeem tso saib 0.1 V thaum ntsuas qhov voltage mus txog 320V. Qhov kev daws teeb meem no zoo ib yam li cov nqi kim dua 20,000-lo lus multimeter ua ntej qhov hluav taws xob ntawm 320V tshaj.
2. Qhov tseeb
Qhov tseeb yog qhov ua yuam kev siab tshaj plaws uas tsim los ntawm kev ua haujlwm tshwj xeeb. Hauv lwm lo lus, qhov tseeb qhia tau hais tias kaw qhov ntsuas qhov ntsuas tau pom los ntawm digital multimeter yog rau tus nqi tiag tiag ntawm cov teeb liab ntsuas.
Qhov tseeb ntawm digital multimeter feem ntau yog qhia raws li feem pua ntawm kev nyeem ntawv. Qhov tseeb yog 1 feem pua ntawm kev nyeem ntawv, thiab yog tias qhov kev nyeem ntawv tso tawm yog 100V, tus nqi hluav taws xob tiag tiag yuav yog tus nqi ntawm 99V thiab 101V V ..
Cov kev tsis sib xws kuj tseem yuav suav nrog ntau qhov me me ntxiv rau qhov tsis raug qhov tseeb. Cov kab no sawv cev rau cov lej ntawm cov lus uas tus lej rightmost ntawm tus nqi tso tawm tuaj yeem hloov pauv. Ua li no, qhov tseeb hauv qhov piv txwv saum toj no tuaj yeem qhia tau tias "(1 feem pua ntxiv 2)". Yog li, yog tias qhov kev nyeem ntawv tso tawm yog 100V, tus nqi hluav taws xob tiag tiag yuav nyob nruab nrab ntawm 98.8V thiab 101.2V V ..
Qhov tsis sib xws ntawm analog multimeter yog txiav txim siab los ntawm qhov ua yuam kev tag nrho, tsis yog los ntawm feem pua ntawm cov ntawv nyeem. Qhov raug raug ntawm analog multimeter yog 2 feem pua lossis 3 feem pua ntawm tag nrho cov nplai. Ntawm 1/10 qhov ntsuas tag nrho, qhov tseeb dhau los ua 20 feem pua lossis 30 feem pua ntawm kev nyeem ntawv. Qhov tseeb qhov tseeb ntawm digital multimeter yog raws li kev nyeem ntawv ntawm (0.7 feem pua ntxiv rau 1) thiab (0.1 feem pua ntxiv 1) lossis zoo dua.
3. Ohm txoj cai
Qhov voltage, tam sim no thiab tsis kam ntawm ib qho hluav taws xob tuaj yeem xam los ntawm ohm txoj cai, uas tau hais tias "voltage sib npaug ntawm cov khoom tam sim no thiab tsis kam". Yog li ntawd, yog tias muaj ob qhov tseem ceeb hauv cov qauv no paub, tus nqi thib peb tuaj yeem pom.
Digital multimeter siv ohm txoj cai los ntsuas ncaj qha thiab tso saib tsis kam, tam sim no lossis voltage. Cov hauv qab no piav qhia yuav ua li cas siv digital multimeter los ntsuas qhov xav tau tsis yooj yim.
4, digital thiab analog zaub
Cov zaub digital muaj qhov tseeb thiab kev daws teeb meem, thiab tuaj yeem tso saib peb lossis ntau qhov khoom rau txhua qhov ntsuas.
Cov lus pom tseeb ntawm analog pointer tsis siab, thiab qhov kev daws teeb meem zoo kuj tseem qis, vim tias tus nqi ntawm ob lub zuam yuav tsum kwv yees.
