Yuav ua li cas siv lub multimeter kom raug

2024 Tus sau: Malcolm Clapton | [email protected]. Kawg hloov kho: 2023-12-17 03:58

Lawv tuaj yeem ntsuas AC thiab DC voltage, tsis kam, tam sim no thiab ntsuas lub voj voog.

Yuav ua li cas multimeter ua haujlwm

Raws li lub npe implies, multimeter yog siv los ntsuas ntau qhov hluav taws xob. Cov cuab yeej siv ntau yam sib xyaw ua ke ntawm voltmeter, ammeter, ohmmeter, txuas ntxiv, thiab kuj tseem tuaj yeem muaj cov haujlwm ntxiv xws li thermocouple lossis lub tshuab hluav taws xob tsawg zaus, kuaj cov capacitors thiab transistors.

Analog testers nrog lub ntsuas thiab ib xub yog yuav luag tsis pom, txij li lawv tau ntev tau hloov los ntawm cov cuab yeej digital. Qhov kawg, ntxiv rau qhov tseeb thiab tus naj npawb ntawm cov qauv, sib txawv ntawm hom kev txiav txim siab ntawm qhov tseem ceeb. Cov tsis siv neeg pom qhov tshwm sim tam sim ntawd tom qab xaiv hom; nyob rau hauv phau ntawv sawv daws yuav, koj yuav tsum tau ntxiv qhov ntsuas qhov ntau.

Tag nrho cov multimeters muaj cov qauv zoo sib xws. Nyob rau hauv pem hauv ntej vaj huam sib luag muaj ib tug screen, nyob rau hauv nws muaj ib tug teb hloov ntawm hom, thiab nyob rau hauv qab no - connectors rau txuas probes. Qee cov qauv muaj cov nyees khawm rau tig lub teeb rov qab, khaws cov ntawv nyeem thiab lwm yam haujlwm ntxiv.

Cov hlau nrog kev sojntsuam, uas yuav tsum tau kov qhov chaw thaum ntsuas, txuas nrog cov khoom sib txuas. Cov hlau dub yeej ib txwm mus rau lub qhov (socket) cim COM, thiab ib qho liab - nyob ntawm tus nqi tam sim no. Yog tias nws tsis tshaj 200 mA, ces mus rau VΩmA connector, yog tias nws tshaj, ces mus rau 10ADC (10A MAX). Nyob rau hauv lub neej niaj hnub, xws li cov dej ntws siab tsis pom, yog li ntawd, VΩmA jack feem ntau yog siv.

Cov lej ntawm qhov ntsuas qhia txog tus nqi siab tshaj plaws uas tuaj yeem kuaj tau hauv qhov ntau. Piv txwv li, nyob rau hauv DCV 20 hom, DC voltage yog ntsuas los ntawm 0 mus rau 20 V. Yog hais tias nws yog 21 V, ces koj yuav tsum tau hloov ib kauj ruam siab dua, mus rau txoj hauj lwm 200. Nws yog ib qho tseem ceeb rau xaiv qhov ntau yam raws li qhov ntsuas tus nqi., txwv tsis pub lub multimeter yuav deteriorate.

Yuav ua li cas ntsuas DC voltage nrog multimeter

Xyuas kom tseeb tias cov thawj coj kuaj tau txuas raug raug.

Hloov mus rau qhov tsis tu ncua voltage hom. Nws feem ntau yog cim los ntawm cov cim V nrog ib txoj kab ncaj nraim thiab dashed lossis DCV.

Hauv multimeters nrog phau ntawv xaiv ntau yam, ntxiv rau qhov ntsuas kwv yees tus nqi, lossis zoo dua ib kauj ruam siab dua. Yog tias tsis paub meej, pib ntawm qhov siab tshaj plaws thiab maj mam qis dua.

Kov cov probes rau cov neeg sib cuag thiab saib ntawm qhov screen. Yog tias qhov kos npe rho tawm tau tshwm sim nrog rau tus lej, nws txhais tau hais tias qhov polarity yog thim rov qab: qhov kev sojntsuam liab kov tus lej, thiab qhov kev sojntsuam dub kov qhov ntxiv.

Nyob rau hauv ib tug handheld multimeter, tej zaum koj yuav tau kho qhov ntsuas ntau yam.

Yog tias cov zaub yog ib qho, koj yuav tsum tau nce qhov ntsuas qhov txwv, yog tias nws yog xoom, cov cim OL lossis OVER - kom txo qis.

Yuav ua li cas ntsuas AC voltage nrog multimeter

Txheeb xyuas tias cov kev sojntsuam txuas nrog raug.

Qhib AC voltage hom. Nws yog cim nrog V ~ lossis ACV.

Hauv handheld multimeters, kuj teem lub approximate ntsuas tus nqi. Zoo dua ib qho thaib siab dua los yog siab tshaj.

Nqa cov kev sojntsuam mus rau cov neeg sib cuag thiab nyeem cov ntawv nyeem los ntawm cov zaub.

Yog hais tias lub multimeter yog nrog phau ntawv ntau thiab cov zaub yog ib qho, nce qhov ntsuas qhov txwv, yog tias nws yog xoom (OL, OVER), qis dua nws.

Yuav ua li cas ntsuas tsis kam nrog multimeter

Xyuas kom tseeb tias cov thawj coj kuaj tau txuas raug raug.

Teem kev ntsuas ntsuas hom. Nws yog denoted los ntawm lub cim Ω.

Yog tias tus ntsuas tau tuav tes, xaiv qhov ntsuas ntsuas kwv yees.

Kov cov kev sojntsuam mus rau cov terminals ntawm cov resistor thiab pom nws qhov kev tiv thaiv ntawm qhov screen.

Nyob rau hauv ib tug handheld multimeter, yog tias tsim nyog, kho qhov ntsuas qhov ntau thiab tsawg.

Yuav ua li cas kuaj lub diode los yog Circuit Court nrog ib tug multimeter

Ntxig qhov kev xeem coj mus rau hauv qhov tseeb terminals ntawm lub multimeter.

Hloov mus rau hom diode txuas ntxiv, qhia los ntawm tus xub cim nrog kab ntsug.

Txuas cov koob ntawm qhov kev xeem coj mus rau cov coj ntawm lub diode. Lub multimeter yuav qhia qhov voltage poob ntawm qhov screen. Yog tias koj sib pauv cov kev sojntsuam, tom qab ntawd nrog lub diode ua haujlwm, lub vijtsam yuav yog ib qho, thiab ntawm ib qho yuam kev - lwm tus lej.

Nyob rau hauv tib hom, koj tuaj yeem ring ib lub voj voog lossis xaim, tab sis koj yuav tsum ua ntej de-energize lawv. Yog tias qhov kev ntseeg tsis raug ua txhaum cai, lub beep yuav suab, yog tias muaj qhov qhib Circuit Court, lub vijtsam tsuas yog tso tawm ib chav, OL lossis OVER.

Ntawm qee qhov multimeters, lub suab nrov hu tau qhib cais. Piv txwv li, ntawm ib tug dub tester, raws li nyob rau hauv daim duab saum toj no. Hom no yog qhia los ntawm lub cim ntim, sau ntawv, lossis tus hais lus.

Yuav ua li cas ntsuas tam sim no nrog multimeter

Txuas qhov kev xeem coj mus rau qhov tseeb terminals ntawm lub multimeter, nyob ntawm seb tus nqi tam sim no.

Teem tam sim no ntsuas hom (DCA, mA).

Nyob rau hauv ib phau ntawv xws li multimeter, teem lub siab tshaj plaws pib.

Txuas cov kev xeem coj hauv series. Tsis zoo li voltage thiab tsis kam, tam sim no tsis ntsuas nyob rau hauv parallel. Ntawd yog, koj yuav tsum tsis yog tsuas yog kov ob lub ntsiab lus ntawm lub voj voog lossis lub pins ntawm ib feem, tab sis txuas lub multimeter mus rau qhov qhib Circuit Court. Yog hais tias txuas nyob rau hauv parallel, lub cuab yeej yuav puas!

Kev noj tam sim no tau tshwm sim ntawm qhov screen. Yog hais tias lub multimeter yog tes tuav, ces koj yuav tau hloov qhov ntau yam kom raug ntau dua.