Rau qhov ceev faj rau kev siv Multimeter
Multimeter yog ib qho cuab yeej siv ntau yam thiab ntau yam ntsuas. Hauv qab no yog cov kev txiav txim siab rau xaiv ib lub multimeter.
1. Muaj nuj nqi: Thaum siv, nws yuav tsum tau xaiv raws li cov kev cai tshwj xeeb.
2. Ntau thiab Ntau Yam: Ib qho digital multimeter muaj ntau qhov sib txawv, tab sis nws qhov ntau qhov tseeb yog qhov siab tshaj plaws. Ntau cov multimeters muaj qhov tsis siv neeg ntau yam ua haujlwm, uas tshem tawm qhov xav tau los hloov kho qhov ntau, ua kom yooj yim, nyab xeeb, thiab nrawm. Ntau cov multimeters digital kuj tseem muaj peev xwm tshaj tawm, yog li tsis tas yuav hloov qhov ntau yam thaum ntsuas tus nqi siab tshaj qhov ntau tab sis tseem tsis tau mus txog qhov siab tshaj plaws, yog li txhim kho qhov tseeb thiab kev daws teeb meem.
3. Qhov tseeb: Qhov siab tshaj plaws tso cai yuam kev ntawm digital multimeter nyob ntawm tsis yog ntawm nws qhov kev ua yuam kev tsis sib xws, tab sis kuj nyob ntawm nws cov lus tsis raug. Thaum xaiv, nws kuj nyob ntawm qhov yuav tsum tau ua rau kev ruaj ntseg yuam kev thiab linearity yuam kev, thiab seb qhov kev daws teeb meem ua tau raws li qhov yuav tsum tau ua. Yog tias ib qho kev ntsuas digital dav dav yuav tsum muaj qib 0.00{{10}}5 txog 0.002, nws yuav tsum muaj tsawg kawg yog 61 tus lej nthuav tawm; 0.005-0.01 qib, nrog tsawg kawg yog 51 tus lej tso tawm; Qib 0.02 txog 0.05, nrog tsawg kawg 41 tus lej tso tawm; Hauv qab qib 0.1, yuav tsum muaj tsawg kawg yog 31 tus lej tso tawm.
4. Input resistance thiab xoom tam sim no: Ob qho tib si tsis tshua muaj input tsis kam thiab siab xoom tam sim no ntawm digital multimeter tuaj yeem ua rau kev ntsuas yuam kev. Qhov tseem ceeb nyob rau hauv qhov tso cai txwv tus nqi ntawm lub ntsuas ntsuas, uas nyob ntawm qhov kev tiv thaiv sab hauv ntawm lub teeb liab qhov chaw. Thaum lub impedance ntawm lub teeb liab qhov chaw siab, cov twj paj nruag uas muaj siab input impedance thiab qis xoom tam sim no yuav tsum tau xaiv los ua kom lawv qhov cuam tshuam tsis zoo.
5. Serial hom kev tiv thaiv piv thiab hom kev tiv thaiv kev sib piv: Thaum muaj ntau yam cuam tshuam xws li hluav taws xob teb, sib nqus teb, thiab ntau lub suab nrov nrov, lossis thaum ntsuas qhov ntev, nws yooj yim los sib xyaw cov teeb liab cuam tshuam, ua rau nyeem tsis raug. Yog li ntawd, cov twj paj nruag uas muaj kev sib tw siab thiab ntau hom kev txwv yuav tsum raug xaiv raws li kev siv ib puag ncig, tshwj xeeb tshaj yog thaum ua cov kev ntsuas siab. Ib qho digital multimeter nrog tiv thaiv davhlau ya nyob twg G yuav tsum raug xaiv kom muaj txiaj ntsig zoo los cuam tshuam hom kev cuam tshuam.
6. Daim ntawv qhia thiab lub hwj chim: Daim ntawv tso saib ntawm lub tshuab hluav taws xob digital tsis txwv rau cov lej, tab sis tseem tuaj yeem tso cov kab kos, ntawv nyeem, thiab cov cim rau ntawm qhov chaw soj ntsuam, kev ua haujlwm, thiab kev tswj xyuas. Raws li sab nraud qhov ntev ntawm nws cov khoom siv, nws tuaj yeem muab faib ua plaub pawg: me, nruab nrab, loj, thiab ultra loj.
