Muaj ob peb lub hauv paus ntsiab lus rau xaiv ib tug multimeter
1. Muaj nuj nqi
Ntxiv nrog rau tsib lub luag haujlwm ntawm kev ntsuas AC thiab DC voltage, AC thiab DC tam sim no, thiab kev tiv thaiv, lub tshuab hluav taws xob digital kuj muaj cov lej digital, ntsuas tus kheej, kev nyeem ntawv, kev nyeem ntawv yuam kev, diode nrhiav, lo lus xaiv ntev, IEEE{{1 }} interface lossis RS -232 interface thiab lwm yam haujlwm yuav tsum raug xaiv raws li cov cai tshwj xeeb thaum siv lawv.
2. Ntau yam thiab ntau yam
Digital multimeters muaj ntau ntau yam, tab sis lawv cov theem pib muaj qhov tseeb tshaj plaws. Ntau cov multimeters muaj qhov pib ua haujlwm, tshem tawm qhov xav tau los hloov kho qhov ntau, ua kev ntsuas yooj yim, raug, thiab nrawm. Kuj tseem muaj ntau cov digital multimeters nrog ntau tshaj qhov muaj peev xwm. Thaum ntsuas tus nqi siab tshaj qhov ntau tab sis tseem tsis tau mus txog qhov siab tshaj plaws zaub, tsis tas yuav hloov qhov ntau, yog li txhim kho qhov tseeb thiab daws teeb meem.
3. Qhov tseeb
Qhov kev ua yuam kev siab tshaj plaws uas tso cai los ntawm digital multimeter nyob ntawm tsis yog ntawm nws qhov kev ua yuam kev tsis sib xws, tab sis kuj nyob ntawm nws qhov yuam kev ruaj khov. Thaum xaiv, nws kuj yog nyob ntawm seb qhov tseeb ntawm qhov kev ruaj ntseg yuam kev thiab qhov kev ua yuam kev linear yog, thiab seb qhov kev daws teeb meem puas ua tau raws li qhov yuav tsum tau ua. Rau cov digital multimeters, yog tias qhov yuav tsum tau muaj yog {{0}}}00{{10}}5 txog 0.002, muaj yuav tsum muaj tsawg kawg yog 61 tus lej los tso saib; 0.005 txog 0.01, yuav tsum muaj tsawg kawg yog 51 tus lej los tso saib; 0.02 txog 0.05, yuav tsum muaj tsawg kawg yog 41 tus lej los tso saib; 0.1 Hauv qab no, tsawg kawg 31 tus lej yuav tsum tau muab tso tawm.
4. Input kuj thiab xoom tam sim no
Yog tias qhov kev tawm tsam ntawm cov digital multimeter tsawg dhau thiab xoom tam sim no siab dhau, nws yuav ua rau kev ntsuas yuam kev. Qhov tseem ceeb nyob ntawm qhov txwv tus nqi tso cai los ntawm cov cuab yeej ntsuas, uas yog, kev tiv thaiv sab hauv ntawm lub teeb liab qhov chaw. Thaum lub teeb liab qhov chaw impedance siab, ib qho cuab yeej nrog siab input impedance thiab qis xoom tam sim no yuav tsum raug xaiv kom nws lub hwj chim tuaj yeem tsis quav ntsej.
5. Series hom tsis lees paub piv thiab hom kev tsis lees paub piv
Thaum muaj kev cuam tshuam ntau yam xws li hluav taws xob, thaj chaw sib nqus thiab ntau lub suab nrov lossis thaum ntsuas qhov ntev, cov teeb liab cuam tshuam tau yooj yim sib xyaw, ua rau kev nyeem tsis raug. Yog li ntawd, cov twj paj nruag nrog cov hlua siab thiab cov hom kev tsis lees paub qhov sib piv yuav tsum raug xaiv raws li kev siv ib puag ncig, tshwj xeeb tshaj yog thaum ua cov kev ntsuas siab, koj yuav tsum xaiv cov multimeter digital nrog tiv thaiv davhlau ya nyob twg G, uas tuaj yeem cuam tshuam ntau hom kev cuam tshuam zoo.
6. Tso daim ntawv thiab lub hwj huam mov
Daim ntawv qhia ntawm digital multimeter tsis txwv rau tus lej. Nws tseem tuaj yeem tso saib cov kab kos, ntawv nyeem thiab cov cim los pab txhawb kev soj ntsuam ntawm qhov chaw, 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 hwj chim ntawm cov multimeters feem ntau yog 220V, thiab qee qhov tshiab digital multimeters muaj ntau lub zog siv hluav taws xob, uas tuaj yeem nyob nruab nrab ntawm 1100V thiab 240V. Qee qhov me me digital multimeters tuaj yeem siv nrog cov roj teeb, thiab qee qhov digital multimeters tuaj yeem siv nrog AC lub zog, cov roj teeb hauv nickel-cadmium, lossis cov roj teeb sab nraud.
