Basic functions ntawm ib tug multimeter
Txheej txheem cej luam ntawm Multimeters
Multimeters, tseem hu ua multiplexers, multimeters, triple meters, thiab multimeters, yog qhov tseem ceeb ntsuas ntsuas hauv hluav taws xob hluav taws xob thiab lwm lub tuam tsev, feem ntau tsom rau ntsuas qhov voltage, tam sim no, thiab tsis kam. Multimeters muab faib ua pointer multimeter thiab digital multimeter raws li lawv hom zaub. Nws yog multifunctional thiab ntau yam ntsuas ntsuas. Feem ntau, multimeter tuaj yeem ntsuas DC tam sim no, DC voltage, AC tam sim no, AC voltage, tsis kam, suab theem, thiab lwm yam. Qee qhov kuj tuaj yeem ntsuas AC tam sim no, capacitance, inductance, thiab qee qhov tsis sib xws ntawm semiconductors (xws li ) thiab lwm yam.
Basic functions ntawm ib tug multimeter
Lub multimeter tsis tsuas yog siv los ntsuas qhov tsis kam ntawm cov khoom ntsuas, tab sis kuj ntsuas AC thiab DC voltage. Qee qhov multimeters tuaj yeem ntsuas qhov tseem ceeb ntawm cov transistors thiab lub peev xwm ntawm capacitors. Kev paub txog kev siv lub tshuab multimeter yog ib qho kev txawj ntse tshaj plaws hauv kev siv tshuab hluav taws xob. Ntau hom multimeter muaj xws li pointer type multimeter thiab digital multimeter. Tus pointer hom multimeter yog ib qho kev ntsuas ntau yam nrog lub taub hau 'meter' raws li cov ntsiab lus tseem ceeb, thiab ntsuas tus nqi yog nyeem los ntawm tus pointer ntawm lub taub hau ntsuas. Qhov ntsuas qhov tseem ceeb ntawm digital multimeter yog ncaj qha tso tawm hauv daim ntawv digital ntawm lub vijtsam LCD, ua rau nws yooj yim nyeem. Ib txhia kuj muaj lub suab hais. Multimeter yog ib hom 'meter' uas suav nrog voltmeter, ammeter, thiab ohmmeter.
DC tam sim no ntau yam ntawm multimeter yog ntau yam DC voltmeter. Kev sib txuas ntawm lub ntsuas hluav taws xob lub taub hau nrog lub kaw hluav taws xob kaw hluav taws xob faib hluav taws xob tuaj yeem nthuav dav nws qhov hluav taws xob ntau. DC voltage ntau ntawm multimeter yog ntau yam DC voltmeter. Qhov hluav taws xob ntau tuaj yeem nthuav dav los ntawm kev sib txuas ntawm lub taub hau 'meter' hauv series nrog lub voltage divider resistor. Qhov sib thooj sib txawv nyob ntawm qhov voltage divider kuj. Lub taub hau ntawm multimeter yog lub tshuab ntsuas magnetoelectric, uas tsuas yog ntsuas AC lub zog los ntawm DC, siv diodes los hloov AC rau DC.
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm multimeter
Lub hauv paus ntsiab lus ntawm multimeter yog siv lub rhiab magnetoelectric direct tam sim no meter (microampere meter) raws li lub taub hau meter. Thaum ib qho me me tam sim no dhau los ntawm lub taub hau meter, yuav muaj qhov qhia tam sim no. Tab sis lub taub hau 'meter' tsis tuaj yeem dhau los ntawm cov tam sim no loj, yog li nws yog qhov yuav tsum tau shunt lossis txo qhov hluav taws xob los ntawm kev sib txuas qee cov resistors nyob rau hauv parallel lossis series ntawm lub taub hau 'meter', txhawm rau ntsuas qhov tam sim no, qhov hluav taws xob, thiab kev tiv thaiv hauv Circuit Court.
Cov txheej txheem ua haujlwm rau Multimeters
1. Ua ntej siv, ib tug yuav tsum paub txog ntau yam kev ua haujlwm ntawm lub tshuab multimeter, thiab xaiv cov iav, qhov ntau, thiab cov qhov (socket) raws li cov khoom ntsuas.
2. Thaum qhov loj ntawm cov ntaub ntawv ntsuas tsis paub, qhov hloov pauv yuav tsum tau teeb tsa tus nqi siab tshaj plaws ua ntej, thiab tom qab ntawd hloov ntawm qhov loj mus rau qhov me me, kom lub ntsuas ntsuas taw qhia ntau tshaj li ib nrab ntawm tag nrho cov nplai.
3. Thaum ntsuas qhov kev tiv thaiv, tom qab xaiv qhov tsim nyog magnification ntau yam, kov ob lub probes ua tus taw tes taw tes ntawm xoom txoj hauj lwm. Yog hais tias tus pointer deviates los ntawm xoom txoj hauj lwm, lub "zero adjustment" pob qhov rooj yuav tsum tau kho kom rov pib dua tus pointer rau xoom kom ntseeg tau tias qhov ntsuas tau raug. Yog tias tsis tuaj yeem hloov kho xoom lossis lub ntsuas ntsuas digital tso tawm lub tswb ntsuas hluav taws xob tsawg, nws yuav tsum tau kuaj xyuas raws sijhawm.
4. Thaum ntsuas qhov kev tiv thaiv ntawm ib qho hluav taws xob Circuit Court, lub hwj chim ntawm qhov ntsuas hluav taws xob yuav tsum raug txiav tawm thiab kev ntsuas nyob tsis raug tso cai.
