Yuav Ua Li Cas Ntsuas DC Voltage nrog Multimeter (Cov Lus Qhia Pib)

Voltage yog kab tias qhov yooj yim tshaj plaws thiab feem ntau nyeem cov ntsuas ntsuas ntsuas. Thaum nyeem ntawv DC voltage yuav zoo li yooj yim thaum xub thawj siab ib muag, tau txais kev nyeem ntawv zoo yuav tsum muaj kev paub tob txog qhov kev ua haujlwm no.

Hauv luv luv, koj tuaj yeem ntsuas DC voltage nrog multimeter los ntawm kev ua raws li cov kauj ruam no. Ua ntej, hloov lub dial mus rau DC voltage. Tom qab ntawd muab cov hlau lead dub tso rau hauv COM jack thiab cov liab coj mus rau hauv V Ω jack. Tom qab ntawd tshem cov dipstick liab ua ntej thiab tom qab ntawd lub dipstick dub. Tom qab ntawd txuas qhov kev xeem coj mus rau lub voj voog. Tam sim no koj tuaj yeem nyeem qhov ntsuas voltage ntawm cov zaub. 

Yog tias koj yog tus pib thiab xav kawm paub ntsuas DC voltage nrog multimeter - ob qho tib si digital thiab analog multimeters - koj tau tuaj rau qhov yog. Peb yuav qhia koj tag nrho cov txheej txheem, suav nrog kev txheeb xyuas cov txiaj ntsig.

Qhov voltage tsis tu ncua yog dab tsi?

Rau kev nkag siab, DC voltage yog ib daim ntawv luv luv ntawm lo lus "DC voltage" - qhov hluav taws xob muaj peev xwm ua tau ncaj qha tam sim no. Ntawm qhov tod tes, alternating voltage muaj peev xwm ua tau alternating tam sim no.

Feem ntau, DC yog siv los txhais cov tshuab nrog cov polarity tas li. Txawm li cas los xij, hauv cov ntsiab lus no, DC feem ntau yog siv los xa mus rau ntau qhov uas nws qhov polarity tsis hloov tsis tu ncua, lossis ntau yam nrog xoom zaus. Cov khoom uas tsis tu ncua hloov polarity nrog qhov zoo zaus yog hu ua alternating tam sim no.

Qhov voltage muaj peev xwm sib txawv / chav them nqi ntawm ob txoj haujlwm hauv qhov hluav taws xob yog qhov hluav taws xob. Lub zog thiab muaj cov khoom siv hluav taws xob (electrons) tsim hluav taws xob. (1)

Qhov sib txawv muaj peev xwm tshwm sim thaum cov hluav taws xob txav ntawm ob lub ntsiab lus - los ntawm qhov muaj peev xwm qis mus rau qhov muaj peev xwm siab. AC thiab DC yog ob hom hluav taws xob hluav taws xob. (2)

Qhov voltage muab los ntawm DC yog qhov peb tab tom tham ntawm no - DC voltage.

Piv txwv ntawm DC qhov chaw muaj xws li roj teeb, hnub ci vaj huam sib luag, thermocouples, DC generators, thiab DC fais fab converters los kho AC.

Yuav ua li cas ntsuas DC voltage nrog multimeter (digital)

1. Hloov lub dial mus rau DC voltage. Yog tias koj DMM los nrog millivolts DC thiab koj tsis paub yuav xaiv qhov twg, pib nrog DC voltage raws li nws tau ntsuas rau qhov siab dua.
2. Tom qab ntawd ntxig qhov kev sojntsuam dub rau hauv COM connector.

3. Kev kuaj liab yuav tsum mus rau hauv V Ω jack. Ua li no, ua ntej tshem cov dipstick liab thiab tom qab ntawd lub dipstick dub.

3. Cov kauj ruam thib plaub yog txuas cov kev sojntsuam mus rau hauv Circuit Court (dub sojntsuam mus rau qhov tsis zoo polarity test point thiab liab probes rau qhov zoo polarity test point).

Nco tseg. Koj yuav tsum paub tias feem ntau niaj hnub multimeters tuaj yeem ntes polarity. Thaum siv digital multimeters, cov xov hlau liab yuav tsum tsis txhob kov lub davhlau ya nyob twg zoo, thiab cov hlau dub yuav tsum tsis txhob kov lub davhlau ya nyob twg tsis zoo. Yog hais tias lub probes kov cov terminals rov qab, lub cim tsis zoo yuav tshwm sim ntawm cov zaub.

Thaum siv ib qho analog multimeter, koj yuav tsum xyuas kom meej tias cov hlau lead yog kov cov terminals kom raug kom tsis txhob ua puas lub multimeter.

5. Tam sim no koj tuaj yeem nyeem qhov ntsuas voltage ntawm cov zaub.

Cov lus qhia pab rau ntsuas DC Voltage nrog DMM

1. Niaj hnub nimno DMMs feem ntau muaj qhov pib ntau yam los ntawm lub neej ntawd, nyob ntawm qhov muaj nuj nqi tso tawm ntawm lub xov tooj. Koj tuaj yeem hloov qhov ntau los ntawm nias lub pob "Range" ob peb zaug kom txog thaum koj ncav cuag qhov xav tau. Qhov ntsuas hluav taws xob yuav poob rau hauv qhov tsawg millivolt DC qhov chaw. Tsis txhob txhawj. Tshem tawm cov kev sojntsuam kuaj, hloov lub xov tooj los nyeem millivolts DC, rov ntxig cov ntsuas ntsuas, thiab tom qab ntawd nyeem qhov ntsuas hluav taws xob.
2. Txhawm rau kom tau txais qhov ntsuas ruaj khov tshaj plaws, nias lub pob "tuav". Koj yuav pom nws tom qab ntsuas qhov voltage tiav.
3. Nias lub pob "MIN / MAX" kom tau txais qhov qis tshaj plaws thiab siab tshaj DC ntsuas, nias lub pob "MIN / MAX". Tos ib lub suab nrov txhua zaus DMM sau cov nqi hluav taws xob tshiab.
4. Yog hais tias koj xav teem lub DMM rau ib tug predetermined tus nqi, nias "REL" (Relative) los yog "?" (Delta) khawm. Cov zaub yuav qhia qhov ntsuas voltage hauv qab thiab siab dua tus nqi siv.

Yuav ua li cas ntsuas DC voltage nrog analog multimeter

Ua raws li cov kauj ruam yooj yim no:

1. Nias lub pob "ON" ntawm koj lub ntsuas kom tig nws.
2. Tig lub qhov rooj multimeter mus rau "V" txoj hauj lwm_DC» - DC voltage. Yog hais tias koj analog multimeter tsis muaj "V_{COLUMBIA REGION,}” xyuas seb puas muaj V nrog txoj kab ncaj nraim ntawm 3 lub ntsiab lus thiab tig lub pob qhov rooj rau nws.

3. Txuas ntxiv mus teeb tsa qhov ntau, uas yuav tsum muaj ntau dua qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov xav tau.
4. Yog tias koj ua haujlwm nrog qhov tsis paub qhov voltage, qhov teeb tsa yuav tsum loj npaum li qhov ua tau.
5. Txuas cov hlau lead dub mus rau COM jack thiab cov hlau lead liab rau VΩ jack (zoo dua yog ib qho nrog VDC ntawm nws).
6. Muab qhov kev sojntsuam dub rau ntawm qhov tsis zoo lossis qis dua qhov taw tes thiab qhov kev sojntsuam liab ntawm qhov zoo lossis qhov siab dua voltage point.
7. Rau qhov siab tshaj plaws deflection, uas pab txhim kho qhov tseeb, txo qhov voltage ntau.
8. Tam sim no coj VDC nyeem ntawv thiab ceev faj tsis txhob nyeem VAC.
9. Tom qab koj tau ua tiav kev nyeem ntawv, tshem tawm qhov kev sojntsuam liab ua ntej thiab tom qab ntawd qhov kev sojntsuam dub.
10. Tua lub multimeter thiab tom qab ntawd teeb tsa qhov siab tshaj plaws los tiv thaiv kev puas tsuaj thaum rov siv dua sai.

Tsis zoo li digital multimeter, analog multimeter tsis ceeb toom koj ntawm kev thim rov qab polarity, uas tuaj yeem ua rau lub multimeter puas. Ceev faj, nco ntsoov hwm tus polarity.

Tus mob overload yog dab tsi thiab thaum twg nws tshwm sim?

Muaj qhov laj thawj zoo vim li cas koj thiaj li raug qhia kom xaiv qhov voltage ntau tshaj qhov xav tau. Xaiv tus nqi qis dua tuaj yeem ua rau overload. Lub 'meter' tsis tuaj yeem ntsuas qhov voltage thaum nws nyob sab nraum qhov ntsuas qhov ntsuas.

Ntawm DMM, koj yuav paub tias koj tab tom cuam tshuam nrog cov xwm txheej dhau los yog DMM nyeem "tawm ntawm ntau", "OL" lossis "1" ntawm qhov screen. Tsis txhob ntshai thaum koj tau txais qhov taw qhia overload. Nws tsis tuaj yeem ua puas lossis puas rau lub multimeter. Koj tuaj yeem kov yeej qhov xwm txheej no los ntawm kev nce qhov ntau nrog cov pob qhov rooj xaiv kom txog thaum koj ncav cuag tus nqi xav tau. Yog tias koj xav tias qhov hluav taws xob poob hauv koj lub voj voog, koj tuaj yeem siv multimeter los ntsuas nws.

Thaum siv ib qho analog multimeter, koj yuav paub tias koj muaj mob hnyav yog tias koj pom "FSD" (Full Scale Deflection) xub. Hauv analog multimeters, overload tej yam kev mob yuav tsum tau zam kom tsis txhob muaj kev puas tsuaj. Nyob deb ntawm qhov tsis tshua muaj hluav taws xob tshwj tsis yog koj paub ntsuas qhov voltage.

Security Council: Tsis txhob hnov ​​​​qab sensors uas tawg lossis liab qab. Ntxiv rau qhov ntxiv qhov yuam kev rau kev ntsuas qhov ntsuas hluav taws xob, kev sojntsuam puas tsuaj yog qhov txaus ntshai rau kev ntsuas hluav taws xob.

Txawm hais tias koj tab tom siv digital multimeter lossis analog multimeter, tam sim no koj paub yuav ua li cas lub multimeter ntsuas voltage. Tam sim no koj tuaj yeem ntsuas tam sim no nrog kev ntseeg siab.

Yog tias koj muab tag nrho koj cov xim rau cov txheej txheem, koj npaj tau ntsuas qhov hluav taws xob los ntawm DC qhov chaw. Tam sim no ntsuas qhov hluav taws xob los ntawm qhov koj nyiam DC qhov chaw thiab saib nws ua haujlwm li cas.

Peb tau teev ob peb qhov kev qhia ntxiv multimeter hauv qab no. Koj tuaj yeem tshawb xyuas thiab bookmark lawv rau kev nyeem tom qab. Ua tsaug! Thiab ntsib koj hauv peb tsab xov xwm tom ntej!

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tswv yim pom zoo

(1) electrons - https://whatis.techtarget.com/definition/electron

(2) hluav taws xob hluav taws xob - https://www.sciencedirect.com/topics/engineering/electrical-energy