Multimeter vs Ohmmeter: Qhov twg yog txoj cai rau koj?

Cov khoom siv hluav taws xob ua lub luag haujlwm tseem ceeb hauv peb lub neej niaj hnub thiab ntau ntawm peb tsis paub nws. Txawm li cas los xij, yog tias koj yog ib tus neeg uas siv koj lub sijhawm ua haujlwm nrog cov khoom siv hluav taws xob, kev paub txog cov chav koom nrog thiab siv lawv li cas yog qhov tseem ceeb. Ib qho ntawm cov ntsuas uas feem ntau ntsuas hauv cov khoom siv hluav taws xob yog qhov tsis kam, thiab qhov no yog dab tsi ohmmeter siv rau. Txawm li cas los xij, koj tseem tuaj yeem ua haujlwm ntawm ib txoj haujlwm nyuaj uas yuav tsum muaj ntau dua li kev ntsuas kev tiv thaiv.

Lwm cov ntsuas ntsuas uas ib yam li ntsuas tau suav nrog voltage, AC / DC, kub, thiab txuas ntxiv. Hauv qhov xwm txheej zoo li no, ib lub 'meter' nrog ntau lub peev xwm tshawb pom lossis "multimeter" yuav tsum tau. Hmoov tsis zoo, ntau tus neeg tsis nkag siab qhov txawv ntawm lawv, txawm tias lawv ua haujlwm nrog lawv. Phau ntawv qhia no yuav pab koj tshem tawm txhua yam, yog li nyeem ntxiv.

Hom multimeters

Multimeter yog ib qho khoom siv uas muaj ntau yam kev xaiv raws li tus qauv. Qhov no ua rau nws yooj yim dua rau cov neeg siv xaiv thaum yuav khoom vim lawv tsuas yog xav tau xaiv lub ntsuas ntsuas uas haum lawv cov kev xav tau. Feem ntau cov meters tuaj nrog ob peb chav nyob, tab sis muaj qee qhov kev xaiv siab heev uas kuj muaj qhov ntsuas tsawg dua. Yeej, tsuas muaj ob hom multimeters: analog multimeters thiab digital multimeters. (1)

Lub analog multimeter, suav hais tias pheej yig dua ntawm ob, muaj qhov xub taw qhia (analog meter) saum toj saud ntsuas ntsuas. Qhov no feem ntau tsis siv ntxiv lawm vim tias lawv cov kev siv yuav muaj teeb meem thiab tuaj yeem ua tsis raug. Qhov tsuas yog siv cov ntaub ntawv uas lawv teeb yog thaum koj xav ntsuas qhov kev hloov me me hauv kev ntsuas, vim tias qhov txav ntawm xub tuaj yeem tuaj yeem nqa txawm tias qhov hloov me me. Analog multimeters kuj pheej yig thiab yog raws li ib tug microammeter. Nov yog ib qho kev qhia rau cov neeg pib nyeem yuav ua li cas nyeem ib qho analog multimeter.

Cov cuab yeej no, hu ua digital multimeter lossis digital multimeter, yog nqa los ntawm txhua tus kws tshaj lij hluav taws xob thiab cov kws tshaj lij. Txij li thaum lawv yog cov txee digital, qhov no txhais tau tias koj tuaj yeem tau txais lawv nrog LCD zaub es tsis txhob siv xub. Lawv muab kev ntsuas raug thiab tuaj nyob rau hauv ntau yam kev ntsuas sib txawv. (2)

Cen-Tech thiab Astroai yog ob qho ntawm cov khoom lag luam digital multimeter ntawm kev ua lag luam niaj hnub no. Koj tuaj yeem tshawb xyuas nws qhov kev tshuaj xyuas tag nrho kom pom qhov twg yog qhov zoo tshaj rau koj.

Hom ntsuas ohmmeter

Muaj peb hom ohmmeters: series ohmmeters, ntau yam ohmmeters, thiab shunt ohmmeters. Lawv txhua tus tau siv los ntsuas qhov tsis kam, thiab ntawm no yog qhov ua haujlwm li cas.

Rau qhov no ohmmeter, qhov tivthaiv uas nws qhov kev tiv thaiv koj xav ntsuas yuav tsum tau txuas nrog cov ntsuas. Cov cuab yeej ua haujlwm los ntawm kev hla tam sim no los ntawm Circuit Court, thiab qhov kev tiv thaiv ntxiv los ntawm cov khoom siv txo qhov ntsuas ntawm xoom mus rau xoom. Infinity sawv cev rau kev khiav dawb, thiab qhov ze ntawm tus nqi yog xoom, qhov kev tiv thaiv ntau dua nyob rau hauv Circuit Court.

Hom ohmmeter no yuav tsum muaj cov khoom sib txuas nrog lub roj teeb nyob rau hauv tib lub sijhawm, thiab qhov kev tawm tsam tau tshwm sim nrog tus xub taw rau sab laug. Lub 'meter' yog qhov yooj yim heev thiab tsis muab qhov ntsuas ntsuas tam sim no lossis infinity.

Qhov no yog qhov ntev ntawm ohmmeter uas tseem muaj tus tswj hwm los pab koj hloov qhov ntau kom haum koj cov kev xav tau. Nyob rau hauv cov ntaub ntawv no, lub ntsuas tivthaiv yog kev cob cog rua nyob rau hauv parallel nrog lub 'meter', thiab tus pointer yuav qhia tau hais tias tus nqi kuj siv.

Qhov sib txawv ntawm multimeter thiab ohmmeter

Cov lus hauv qab no nthuav tawm qee qhov sib txawv tseem ceeb ntawm ohmmeter thiab multimeter.

multimeter	ohmmeter
Lub multimeter tuaj yeem ua haujlwm ib yam li ohmmeter thiab ntsuas lwm yam xws li zaus, qhov kub thiab txias, voltage, capacitance, thiab lwm yam.	Tib chav ntsuas los ntawm ohmmeter yog qhov tsis kam thiab txuas ntxiv.
Multimeters zoo li yuav kim dua, thiab nyob ntawm kev ua haujlwm, lawv tuaj yeem tau txais kim heev.	Ohmmeters yog pheej yig dua vim lawv cov haujlwm tsawg.
Multimeters yog qhov tseeb ntau dua vim lawv cov circuitry thiab qhov tseeb tias lawv tuaj yeem ntsuas cov ntsuas digital.	Ohmmeter qhov tseeb tsis zoo li, tshwj xeeb tshaj yog vim qhov tsim analog.

Multimeter vs ohmmeter: leej twg yuav yeej?

Nws yog tseeb hais tias los ntawm ib tug functional point ntawm view, ib tug multimeter muaj peev xwm ntau tshaj li ib tug ohmmeter. Txawm li cas los xij, yog tias kev tiv thaiv thiab kev txuas ntxiv yog txhua yam koj xav txog thiab kev ntsuas thiab qhov tseeb tsis yog qhov teeb meem, ces lub ohmmeter yuav yog qhov kev xaiv zoo tshaj rau koj. Txawm li cas los xij, rau qhov kev paub ua haujlwm zoo tshaj plaws, koj yuav tsum xaiv rau multimeter nrog digital meters.

tswv yim pom zoo

(1) Kev ntsuas theem pib - https://www.britannica.com/video/

214818/SI-overview-international-system-of-units yog dab tsi

(2) LCD Zaub — https://electronics.howstuffworks.com/lcd.htm