6 kev tiv thaiv thaum siv multimeter
1. Muaj nuj nqi: Nws yuav tsum raug xaiv raws li cov kev cai tshwj xeeb thaum siv.
2. Ntau yam thiab ntau yam: Cov digital multimeter muaj ntau qhov sib txawv, tab sis nws qhov ntau yam muaj qhov tseeb tshaj plaws. Ntau cov multimeters muaj cov haujlwm tsis siv neeg, tsis tas yuav hloov kho qhov ntau, ua qhov kev ntsuas yooj yim, nyab xeeb 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 tsis tau mus txog qhov siab tshaj plaws, nws 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 cov khoom tsis sib xws, tab sis kuj ntawm nws cov khoom ruaj khov yuam kev. Thaum xaiv, nws kuj yog nyob ntawm qhov yuav tsum tau muaj 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 hais tias qhov dav dav digital multimeter xav tau 0.0005 txog 0.002, tsawg kawg yog 61 tus lej yuav tsum tau tso tawm; 0.005 txog 0.01, tsawg kawg yog 51 tus lej yuav tsum tau tso tawm; 0.02 txog 0.05, tsawg kawg yog 41 tus lej yuav tsum tau tso tawm; 0.1 Hauv qab no, tsawg kawg 31 tus lej yuav tsum tau muab tso tawm.
4. input resistance thiab xoom tam sim no: Yog hais tias cov input tsis kam ntawm cov multimeter yog tsawg dhau thiab xoom tam sim no siab dhau lawm, 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. Serial hom rejection piv thiab ntau hom kev tsis lees paub piv: Thaum muaj ntau yam cuam tshuam xws li hluav taws xob teb, sib nqus teb thiab ntau lub suab nrov lossis kev ntsuas ntev, nws yooj yim sib xyaw hauv cov teeb liab cuam tshuam, ua rau kev nyeem ntawv tsis raug, Yog li nws yuav tsum tau hloov kho raws li kev siv ib puag ncig Xaiv ib qho cuab yeej nrog txoj hlua siab thiab hom kev tsis lees paub qhov sib piv, tshwj xeeb tshaj yog thaum ua cov kev ntsuas siab, koj yuav tsum xaiv cov multimeter digital nrog lub davhlau ya nyob twg tiv thaiv G, uas tuaj yeem tiv thaiv ntau hom kev cuam tshuam. .
6. Cov ntawv qhia zaub mov thiab lub hwj chim: Daim ntawv tso saib ntawm digital multimeter tsis txwv rau cov lej, tab sis tseem tuaj yeem tso cov kab kos, ntawv nyeem thiab cov cim, txhawm rau pab txhawb kev soj ntsuam ntawm qhov chaw, kev ua haujlwm thiab kev tswj hwm. Raws li qhov ntev ntawm nws cov khoom siv, nws tuaj yeem muab faib ua plaub pawg: me, nruab nrab, loj thiab super loj.
