Kuv tuaj yeem xaiv qhov zoo multimeter rau kuv qhov kev xav tau li cas?
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, muaj cov lej digital, ntsuas tus kheej, nyeem ntawv kom tswj, nyeem ntawv yuam kev, diode nrhiav, lo lus xaiv ntev, IEEE -488 interface los yog RS -232 interface thiab lwm yam haujlwm, kev siv cov kev siv tshwj xeeb raws li kev xaiv.
2, Ntau yam thiab ntau yam
Digital multimeter muaj ntau ntau yam, tab sis nws qhov yooj yim ntau yam raug * siab. Ntau cov digital multi-meter muaj kev ua haujlwm tsis siv neeg, tsis tas yuav hloov kho qhov ntau, ua qhov kev ntsuas yooj yim, **, nrawm. Muaj ntau cov digital multi-meter over-range muaj peev xwm, nyob rau hauv kev ntsuas ntawm tus nqi tshaj qhov ntau tab sis tseem tsis tau mus txog * cov zaub loj tsis tuaj yeem hloov pauv thaum qhov ntau, yog li txhim kho qhov tseeb thiab kev ntxub ntxaug lub zog.
3, qhov tseeb
Digital multi-meter tso cai rau * qhov yuam kev yuav tsum tsis tsuas yog saib ntawm nws qhov kev hloov pauv lub sijhawm yuam kev, tab sis kuj saib nws cov lus tsis raug. Thaum xaiv, peb kuj yuav tsum tau saib cov kev ruaj ntseg yuam kev thiab linearity yuam kev kom paub ntau npaum li cas, seb lub hwj chim ntawm kev ntxub ntxaug kom tau raws li qhov yuav tsum tau ua. General digital multi-meter xws li cov kev xav tau ntawm 0.0005 qib rau 0.00 2 qib, yam tsawg kawg 61 cov zaub; 0.005 qib rau 0.01 qib, yam tsawg kawg 51 cov zaub; 0.02 qib rau 0.05 qib, yam tsawg kawg 41 cov zaub; 0.1 qib hauv qab no, yam tsawg kawg 31 cov zaub.
4, input tsis kam thiab xoom tam sim no
Digital multi-meter input tsis kam yog tsawg dhau thiab xoom tam sim no siab dhau yuav ua rau ntsuas qhov yuam kev, qhov tseem ceeb yog saib cov cuab yeej ntsuas tau tso cai los ntawm tus nqi txwv yog ntau npaum li cas, uas yog, pom qhov loj ntawm lub teeb liab qhov chaw ntawm lub internal kuj. Thaum lub teeb liab qhov impedance siab, qhov ntsuas nrog siab input impedance thiab qis xoom tam sim no yuav tsum raug xaiv kom nws cov nyhuv tuaj yeem tsis quav ntsej.
5, Series-hom rejection piv thiab hom kev tsis lees paub piv
Nyob rau hauv lub xub ntiag ntawm ntau yam cuam tshuam xws li hluav taws xob teb, sib nqus teb thiab ntau lub suab nrov nrov lossis kev ntsuas qhov ntev, nws yooj yim rau kev sib xyaw rau hauv cov teeb liab cuam tshuam, ua rau kev nyeem ntawv tsis raug, yog li nws yuav tsum tau siv raws li ib puag ncig los xaiv cov koob, hom kev tsis lees paub qhov piv ntawm cov cuab yeej yog siab, tshwj xeeb tshaj yog rau cov kev ntsuas siab, nws yuav tsum tau xaiv nrog kev tiv thaiv kawg ntawm G digital multi-meter, uas tuaj yeem tiv thaiv zoo heev ntawm hom-hom. cuam tshuam.
6, Daim ntawv qhia thiab lub hwj huam mov
Daim ntawv tso saib ntawm cov digital multi-meter tsis yog hauv cov digital xwb, tab sis kuj 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 sab nraud qhov ntev ntawm nws cov khoom siv tuaj yeem muab faib ua plaub pawg me, nruab nrab, loj thiab loj.
Digital multi-meter fais fab mov feem ntau yog 220V, thiab qee qhov tshiab digital multi-meter fais fab mov yog dav heev, tuaj yeem nyob nruab nrab ntawm 1100V ~ 240V. Qee qhov me me digital multi-meter nrog lub roj teeb tuaj yeem siv tau, muaj qee qhov digital multi-meter muaj nyob rau hauv daim ntawv ntawm kev hloov tam sim no, cov roj teeb hauv nickel-cadmium lossis cov roj teeb sab nraud.
7, lub sij hawm teb, ntsuas ceev, ntau zaus
Lub sij hawm teb luv luv, qhov zoo dua, tab sis muaj qee lub sij hawm teb cov lus teb yog qhov ntev, tos ib lub sij hawm ua ntej kev nyeem ntawv yuav ruaj khov. Kev ntsuas ceev yuav tsum yog nyob ntawm seb puas los yog tsis yog qhov kev ntsuam xyuas nrog kev sib koom ua ke, xws li kev sib koom ua ke, qhov ceev yog qhov tseem ceeb heev, thiab qhov ceev yog qhov zoo dua. Ntau zaus, qhov kev xaiv tsim nyog raws li qhov xav tau.
8, AC voltage converter daim ntawv
Kev ntsuas hluav taws xob AC muab faib ua qhov nruab nrab hloov pauv, kev hloov pauv siab tshaj plaws thiab RMS hloov pauv. Thaum lub waveform distortion yog loj, qhov nruab nrab hloov dua siab tshiab thiab ncov conversion tsis raug, thaum lub RMS hloov dua siab tshiab tsis tuaj yeem cuam tshuam los ntawm waveform, yog li ntawd qhov ntsuas qhov ntsuas tau raug ntau dua.
9, tiv thaiv kab mob
Muaj plaub-xaim thiab ob-xaim kab hluav taws xob rau kev ntsuas kev tiv thaiv. Rau me me tsis kam thiab high-precision ntsuas, koj yuav tsum xaiv qhov kev ntsuas kev tiv thaiv thaiv nrog plaub-xaim system.
Nrog rau kev loj hlob ntawm kev sib xyaw ua ke loj thiab cov cuab yeej siv thev naus laus zis, digital multi-meter maj mam mus rau miniaturisation, qis zog, qis-qis kev taw qhia, digital multi-meter kuj qhia meej meej faib rau hauv portable thiab desktop ob. Portable feem ntau 31 lossis 41 khoom, me me, lub teeb yuag, tsis muaj zog noj, tsim nyog rau kev cob qhia ntau lawm lossis siv teb; desktop mus txog 61 lossis 71 khoom, qhov tseeb thiab kev daws teeb meem tau nce siab dua, kev siv cov microprocessors thiab GP-IB interface cov cuab yeej, nyob rau hauv metrology, kev tshawb fawb tshawb fawb thiab cov tuam tsev tsim khoom raws li cov qauv lus thiab kev ntsuas qhov tseeb.
