Muaj ntau txoj hauv kev los xaiv ib lub multimeter
1. Muaj nuj nqi
Ntxiv rau qhov ntsuas AC thiab DC voltage, AC thiab DC tam sim no, kev tiv thaiv, thiab lwm yam tsib lub luag haujlwm, lub tshuab hluav taws xob digital kuj muaj cov haujlwm xws li kev suav digital, kev kuaj xyuas tus kheej, nyeem ntawv tuav, nyeem ntawv yuam kev, diode nrhiav, lo lus ntev xaiv, IEEE{ {0}} interface lossis RS -232 interface. Thaum siv nws, nws yuav tsum raug xaiv raws li cov cai tshwj xeeb.
2. Ntau thiab Ntau
Ib tug digital multimeter muaj ntau ntau yam, tab sis nws cov theem pib qhov tseeb yog qhov siab tshaj plaws. Ntau cov digital multimeters muaj qhov tsis siv neeg ntau yam muaj nuj nqi, uas tshem tawm qhov xav tau ntawm phau ntawv hloov kho, ua kom yooj yim thiab ceev. Kuj tseem muaj ntau lub tshuab digital multimeters nrog ntau tshaj qhov muaj peev xwm, uas tuaj yeem txhim kho qhov tseeb thiab kev daws teeb meem los ntawm kev tsis hloov ntau yam thaum ntsuas tus nqi tshaj qhov ntau tab sis tseem tsis tau mus txog * cov zaub loj.
3. Qhov tseeb
Qhov siab tshaj plaws kev ua yuam kev ntawm digital multimeter nyob ntawm tsis yog ntawm nws qhov kev ua yuam kev sib txawv, tab sis kuj nyob ntawm nws qhov yuam kev ruaj khov. Thaum xaiv, nws tseem ceeb heev uas yuav tau txiav txim siab txog tus nqi ntawm kev ruaj ntseg yuam kev thiab linearity yuam kev, nrog rau seb qhov kev daws teeb meem ua tau raws li qhov yuav tsum tau ua. Yog hais tias ib tug dav dav digital multimeter yuav tsum tau ib theem ntawm {{0}} 00{{10}}5 rau 0.002, nws yuav tsum muaj tsawg kawg yog 61 tus lej tso tawm; 0.005 txog 0.01 qib, nrog tsawg kawg 51 tus lej tso tawm; Qib 0.02 txog 0.05, nrog tsawg kawg yog 41 tus lej tso tawm; Hauv qab 0.1 qib, yuav tsum muaj tsawg kawg 31 tus lej tso tawm.
4. Input kuj thiab xoom tam sim no
Digital Multimeter
Ob qho tib si tsis muaj kev tawm tswv yim thiab siab xoom tam sim no tuaj yeem ua rau ntsuas qhov yuam kev. Qhov tseem ceeb yog los txiav txim siab tus nqi txwv ntawm qhov 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 raug xaiv kom lawv cov kev cuam tshuam tuaj yeem tsis quav ntsej.
5. Serial hom rejection piv thiab hom hom rejection piv
Thaum muaj kev cuam tshuam ntau yam xws li hluav taws xob, thaj chaw sib nqus, thiab lub suab nrov nrov, lossis thaum ntsuas qhov ntev, nws yooj yim sib xyaw cov teeb liab cuam tshuam, ua rau kev nyeem tsis raug. Yog li ntawd, cov twj paj nruag uas muaj kev sib tw siab thiab ntau hom kev tiv thaiv yuav tsum raug xaiv raws li kev siv ib puag ncig. Tshwj xeeb tshaj yog thaum ua cov kev ntsuas siab, cov multimeters digital nrog kev tiv thaiv terminals G yuav tsum raug xaiv kom muaj txiaj ntsig zoo rau kev cuam tshuam hom kev cuam tshuam.
6. Tso tawm hom ntawv thiab lub hwj huam mov
Cov ntawv tso tawm ntawm lub tshuab hluav taws xob digital tsis txwv rau cov lej, tab sis tuaj yeem tso cov kab kos, ntawv nyeem, thiab cov cim rau ntawm qhov chaw soj ntsuam, kev ua haujlwm, thiab kev tswj hwm. 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.
Lub zog hluav taws xob rau digital multimeters feem ntau yog 220V, thaum qee hom tshiab digital multimeters muaj ntau lub zog, xws li 1100V txog 240V. Qee qhov me me digital multimeters tuaj yeem siv tau nrog cov roj teeb, thaum lwm tus tuaj yeem siv peb hom: AC, cov roj teeb hauv nickel cadmium, lossis cov roj teeb sab nraud.
