Dab tsi yog lub cim rau microfarads ntawm lub multimeter?
Txheem
Yog tias koj yog tus kws tshaj lij hluav taws xob lossis tsuas yog pib nrog hluav taws xob, koj yuav tsum paub txog ntau yam khoom siv hluav taws xob. Ib qho ntawm cov no yog microfarad.
So Dab tsi yog lub cim rau microfarads ntawm lub multimeter?? Cia peb teb lo lus nug no.
Peb siv microfarads qhov twg?
Microfarads yog siv nyob rau hauv ntau yam khoom siv hluav taws xob, nrog rau cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab cov hluav taws xob sib txuas.
Tab sis feem ntau koj yuav ntsib lawv thaum ntsuas lub capacitance ntawm lub capacitor.
Lub capacitor yog dab tsi?
Lub capacitor yog ib qho khoom siv hluav taws xob uas siv los khaws cov nqi hluav taws xob. Nws muaj ob lub phaj hlau muab tso ze ua ke nrog cov khoom siv tsis zoo (hu ua dielectric) nyob nruab nrab.
Thaum cov hluav taws xob tam sim no dhau los ntawm lub capacitor, nws tsub cov phiaj. Lub zog hluav taws xob khaws cia no tuaj yeem siv los siv hluav taws xob hluav taws xob.
Capacitors siv ntau yam khoom siv hluav taws xob, suav nrog khoos phis tawj, xov tooj ntawm tes, thiab xov tooj cua.
Muaj ob lub ntsiab ntawm capacitor:
Polar Capacitor
Polarized capacitors yog ib hom electrolytic capacitor uas siv cov electrolyte los muab txoj hauv kev rau electrons. Hom capacitor no yog siv rau ntau yam kev siv xws li cov khoom siv hluav taws xob, kev sib txuas lus, kev sib txuas, thiab kev lim dej.
Electrolytic capacitor feem ntau loj dua thiab muaj lub peev xwm siab dua li lwm hom capacitors.
Tsis yog-polar capacitor
Tsis yog-polar capacitor yog hom capacitor uas khaws lub zog hauv qhov hluav taws xob. Hom capacitor no tsis muaj polarizing electrode, yog li lub teb hluav taws xob yog symmetrical.
Tsis yog-polar capacitors siv ntau yam khoom siv, suav nrog xov tooj cua, TV, thiab lwm yam khoom siv hluav taws xob.
Dab tsi yog capacitor terminals?
Lub capacitor muaj ob lub davhlau ya nyob twg: lub davhlau ya nyob twg zoo thiab lub davhlau ya nyob twg tsis zoo. Lub davhlau ya nyob twg zoo feem ntau yog cim nrog "+" kos npe, thiab lub davhlau ya nyob twg tsis zoo nrog "-" kos npe.
Cov terminals yog tsim los txuas lub capacitor rau hauv hluav taws xob Circuit Court. Lub davhlau ya nyob twg zoo yog txuas nrog lub hwj huam mov thiab lub davhlau ya nyob twg tsis zoo txuas nrog hauv av.
Yuav ua li cas nyeem ib tug capacitor?
Yuav kom nyeem tau lub capacitor, koj yuav tsum paub ob yam: voltage thiab capacitance.
Voltage yog tus nqi hluav taws xob muaj peev xwm sib txawv ntawm qhov zoo thiab qhov tsis zoo ntawm lub capacitor. Capacitance yog lub peev xwm ntawm lub capacitor los khaws cov nqi hluav taws xob.
Voltage feem ntau yog sau rau ntawm lub capacitor thiab capacitance feem ntau yog sau rau ntawm sab ntawm lub capacitor.
Microfarad cim ntawm lub multimeter
Lub cim rau microfarads yog "uF", uas koj yuav pom ntawm lub dial ntawm koj lub multimeter. Koj tuaj yeem pom nws sau ua "uF". Txhawm rau ntsuas hauv microfarads, teeb lub multimeter mus rau "uF" lossis "uF" txoj haujlwm.
Tus qauv chav tsev rau capacitance yog farad (F). Ib tug microfarad yog ib lab ntawm ib tug farad (0.000001 F).
Lub microfarad (µF) yog siv los ntsuas qhov capacitance ntawm cov khoom siv hluav taws xob lossis hluav taws xob. Lub capacitance ntawm cov khoom siv hluav taws xob lossis hluav taws xob yog lub peev xwm khaws cov hluav taws xob.
Cov ntsiab lus tseem ceeb ntawm Farad unit
Farad yog ib chav ntsuas rau capacitance. Nws yog lub npe hu ua lus Askiv physicist Michael Faraday. Lub farad ntsuas ntau npaum li cas cov nqi hluav taws xob khaws cia ntawm lub capacitor.
Hauv lub rooj koj tuaj yeem pom qhov sib txawv ntawm farad, nrog rau lawv cov proportions.
| имя | cim | Hloov Siab | Piv txwv |
| hauv picofara | pF | 1 npF = 10-12F | C = 10 pF |
| nf ib | nF | 1 nF = 10-9F | C = 10 nF |
| hauv microwave | uF | 1 µF = 10-6F | C = 10 uF |
| millifarad | mF | 1 mF = 10-3F | C = 10 mF |
| faiv | F | S = 10 F | |
| kilofaad | kF | 1 kF = 103F | C = 10 kF |
| megatariffs | MF | 1 TZS = 106F | S = 10 MF |
Yuav ntsuas microfarad li cas?
Txhawm rau ntsuas qhov capacitance ntawm lub capacitor, koj yuav xav tau ib qho multimeter uas muaj peev xwm ntsuas microfarads. Feem ntau pheej yig multimeters tsis muaj qhov no.
Ua ntej ntsuas, nco ntsoov tso lub capacitor kom tsis txhob puas lub multimeter.
Ua ntej txheeb xyuas qhov zoo thiab tsis zoo terminals ntawm lub capacitor. Ntawm lub polarized capacitor, ib qho ntawm cov terminals yuav raug cim "+" (zoo) thiab lwm yam "-" (tsis zoo).
Tom qab ntawd txuas lub multimeter coj mus rau lub capacitor terminals. Xyuas kom tseeb tias qhov kev sojntsuam dub txuas nrog lub davhlau ya nyob twg tsis zoo thiab qhov kev sojntsuam liab txuas nrog lub davhlau ya nyob twg zoo.
Tam sim no qhib koj lub multimeter thiab teeb tsa los ntsuas microfarads (uF). Koj yuav pom kev nyeem ntawv hauv microfarads ntawm cov zaub.
Tam sim no koj paub tias lub cim microfarad yog dab tsi thiab ntsuas lawv li cas, koj tuaj yeem pib siv lawv hauv koj cov haujlwm hluav taws xob.
Cov lus qhia txog kev nyab xeeb thaum kuaj cov capacitor
Kev ntsuas capacitors yuav tsum tau ceev faj.
Nrog kev saib xyuas thiab kev xav, koj tuaj yeem ntsuas cov capacitors yam tsis muaj kev puas tsuaj rau lub cuab yeej uas ntsuas lawv lossis koj tus kheej.
- Hnav hnab looj tes tuab tiv thaiv koj txhais tes.
- Yog tias lub capacitor raug nias tawm tsam koj lub cev (piv txwv li, thaum ntsuas nws tom qab ntawm lub tshuab hluav taws xob lossis lwm qhov chaw nruj), sawv ntsug ntawm qhov chaw qhuav, insulated nto (xws li roj hmab lev) kom tsis txhob muaj hluav taws xob poob.
- Siv qhov tseeb, zoo calibrated digital voltmeter teem rau qhov tseeb. Tsis txhob siv ib qho analog voltmeter (tsiv pointer) uas tej zaum yuav raug puas tsuaj los ntawm cov tam sim no siab thaum kuaj cov capacitors.
- Yog tias koj tsis paub meej tias lub capacitor yog polarized (muaj + thiab - terminals), xyuas nws cov ntaub ntawv. Yog tias cov ntaub ntawv ploj lawm, xav tias nws yog polarized.
- Tsis txhob txuas lub capacitor ncaj qha mus rau lub hwj huam mov terminals vim qhov no yuav ua rau lub capacitor puas.
- Thaum ntsuas DC voltage hla lub capacitor, nco ntsoov tias voltmeter nws tus kheej yuav cuam tshuam rau kev nyeem ntawv. Txhawm rau kom tau txais kev nyeem ntawv raug, ua ntej ntsuas qhov ntsuas hluav taws xob nrog lub ntsuas hluav taws xob luv luv, thiab tom qab ntawd rho tawm qhov hluav taws xob "tsis zoo" los ntawm kev nyeem ntawv nrog lub ntsuas hluav taws xob txuas nrog lub capacitor.
xaus
Tam sim no koj paub tias lub cim microfarad zoo li cas, koj tuaj yeem ntsuas lub capacitor nrog digital multimeter. Peb cia siab tias phau ntawv qhia no tau pab koj nkag siab tias farads ua haujlwm li cas ntawm kev ntsuas.
