Yuav Ua Li Cas Xaiv Qhov Zoo Tshaj Multimeter rau Koj Tus Kheej?
1. Muaj nuj nqi
Ntxiv rau tsib lub luag haujlwm ntawm kev ntsuas AC thiab DC voltage, AC thiab DC tam sim no, kev tiv thaiv, thiab lwm yam, 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 pom, lo lus ntev xaiv, IEEE-488 interface lossis RS-232 interface. Thaum siv nws, nws 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 ntau qhov tseeb yog siab. Ntau lub tshuab digital multimeters muaj ntau yam tsis siv neeg ua haujlwm, uas tshem tawm qhov xav tau ntawm phau ntawv hloov kho ntau yam, ua kom yooj yim ntsuas, * *, thiab nrawm. Kuj tseem muaj ntau lub tshuab digital multimeters uas muaj peev xwm dhau ntau yam. 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 kev ua yuam kev ntawm ib lub multimeter yog nyob ntawm tsis yog ntawm nws lub sij hawm sib txawv ntawm qhov yuam kev, tab sis kuj nyob ntawm nws lub sij hawm tsis raug. Thaum xaiv qhov kev xaiv, nws tseem yuav tsum tau txiav txim siab ntau npaum li cas qhov kev ua yuam kev ruaj khov thiab qhov yuam kev linear yuav tsum tau ua, 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, nrog tsawg kawg 51 tus lej tso tawm; Qib 0.02 txog 0.05, nrog tsawg kawg 41 tus lej tso tawm; Hauv qab qib 0.1, yuav tsum muaj tsawg kawg yog 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 nrog 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 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 luv, 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 conversion 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.
Nrog rau kev loj hlob ntawm kev sib xyaw ua ke loj thiab cov cuab yeej siv thev naus laus zis, digital multimeters tau maj mam txav mus rau qhov me me, kev siv hluav taws xob tsawg, thiab tus nqi qis. Digital multimeters kuj tau muab faib ua ob hom: portable thiab desktop. Cov khoom siv portable feem ntau yog 31 lossis 41 me ntsis, nrog rau qhov me me, lub teeb yuag, thiab siv hluav taws xob tsawg, tsim nyog rau kev cob qhia ntau lawm lossis siv sab nraum zoov; Desktop tuaj yeem ncav cuag 61 lossis 71 khoom, nrog rau qhov tseeb thiab kev daws teeb meem. Nws siv microprocessors thiab GP-IB interface li, thiab yog siv los ua tus qauv ntsuas thiab ntsuas qhov tseeb hauv metrology, kev tshawb fawb tshawb fawb, thiab cov tuam tsev tsim khoom.
