Kev xaiv qhov tsim nyog Digital Multimeters Raws li Cov Txheej Txheem saum toj no
Digital multimeters yog tus cwj pwm los ntawm qhov raug siab, ntsuas qhov dav, ntsuas ceev ceev, me me, muaj zog tiv thaiv kev cuam tshuam, thiab siv tau yooj yim
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, niaj hnub digital multimeters kuj muaj cov haujlwm xws li kev suav digital, kev kuaj xyuas tus kheej, kev nyeem ntawv, kev nyeem ntawv yuam kev, nrhiav kom pom, lo lus xaiv ntev, IEEE-488 interface lossis RS-323 interface. Thaum siv lawv, lawv yuav tsum raug xaiv raws li cov cai tshwj xeeb.
2, Ntau yam thiab ntsuas ntau yam
Ib qho digital multimeter muaj ntau ntau yam, tab sis nws qhov tseeb qhov tseeb yog qhov siab. Ntau cov multimeters muaj qhov tsis siv neeg ntau yam ua haujlwm, uas tshem tawm qhov xav tau ntawm phau ntawv hloov kho, ua kom yooj yim, nyab xeeb, thiab nrawm. Kuj tseem muaj ntau cov digital multimeters uas muaj peev xwm tshaj qhov ntau. 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 siab tshaj plaws tso cai yuam kev ntawm lub tshuab digital multimeter nyob ntawm tsis yog ntawm nws qhov kev hloov pauv lub sijhawm yuam kev, tab sis kuj nyob ntawm nws qhov yuam kev ruaj khov. Thaum xaiv, nws kuj tseem yuav tsum tau txiav txim siab txog qhov yuav tsum tau ua rau kev ruaj ntseg yuam kev thiab kev ua haujlwm tsis zoo, thiab seb qhov kev daws teeb meem puas ua tau raws li qhov yuav tsum tau ua. Rau cov digital multimeters uas xav tau qib 0.0005 txog 0.002, tsawg kawg yog 61 tus lej yuav tsum tau tso tawm; Qib 0.005 txog 0.01, muaj tsawg kawg yog 51 tus lej tso tawm; Qib 0.02 txog 0.05, nrog tsawg kawg yog 41 tus lej tso tawm; Hauv qab qib 0.1, yuav tsum muaj tsawg kawg 31 tus lej tso tawm.
4, Input kuj thiab xoom tam sim no
Cov kev tawm tswv yim qis thiab siab xoom tam sim no ntawm digital multimeter tuaj yeem ua rau ntsuas qhov yuam kev. Tus yuam sij yog los txiav txim siab tus nqi txwv tso cai los ntawm cov cuab yeej ntsuas, uas yog, 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, 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 lub suab nrov 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 uas muaj kev sib tw siab thiab ntau hom kev tsis lees paub yuav tsum raug xaiv raws li kev siv ib puag ncig. Tshwj xeeb tshaj yog rau cov kev ntsuas siab, lub multimeter digital nrog lub davhlau ya nyob twg tiv thaiv G yuav tsum raug xaiv los ua kom muaj kev cuam tshuam ntau hom kev cuam tshuam.
6, Zaub hom thiab lub hwj chim 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 super loj.
Lub zog hluav taws xob ntawm lub tshuab hluav taws xob digital feem ntau yog 220V, thaum qee hom tshiab digital multimeters muaj lub zog dav dav, uas tuaj yeem nyob nruab nrab ntawm 1100V thiab 240V. Qee qhov me me digital multimeters tuaj yeem siv nrog cov roj teeb, thaum lwm tus tuaj yeem ua peb hom: AC lub zog, cov roj teeb nickel cadmium sab hauv, lossis cov roj teeb sab nraud.
7, Lub sij hawm teb, ntsuas ceev, ntau zaus
Lub sij hawm teb luv dua, qhov zoo dua, tab sis qee qhov meters muaj lub sijhawm teb ntev dua thiab yuav tsum tau tos rau lub sijhawm ua ntej kev nyeem ntawv tuaj yeem ruaj khov. Kev ntsuas ceev yuav tsum yog nyob ntawm seb nws puas siv nrog rau kev ntsuas qhov system. Yog siv ua ke, kev ceev yog qhov tseem ceeb, thiab qhov ceev ceev, qhov zoo dua. Qhov ntau zaus yuav tsum raug xaiv kom 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 tus nqi hloov pauv, tus nqi siab tshaj plaws hloov pauv, thiab kev hloov pauv tus nqi zoo. Thaum lub waveform distortion loj, qhov nruab nrab thiab qhov siab tshaj plaws hloov dua siab tshiab yog qhov tsis raug, thaum qhov kev hloov pauv tus nqi zoo tsis cuam tshuam los ntawm waveform, ua rau kev ntsuas qhov tseeb dua.
9, Kev tiv thaiv thaiv txoj kev
Muaj plaub xaim thiab ob txoj hlua hlau rau kev ntsuas kev tiv thaiv. Thaum ua qhov kev tiv thaiv me me thiab kev ntsuas siab, yuav tsum tau xaiv qhov kev ntsuas kev tiv thaiv thaiv nrog plaub txoj hlua hlau.
