Luv Mnemonic rau Multimeter Ua Haujlwm
Multimeter, tseem hu ua multimeter, multimeter, los yog multimeter, yog ib tug multifunctional thiab ntau yam ntsuas ntsuas. Feem ntau, multimeter tuaj yeem ntsuas DC tam sim no, DC voltage, AC voltage, tsis kam, thiab qib suab, thiab qee qhov kuj tuaj yeem ntsuas AC tam sim no, capacitance, inductance, thiab qee qhov tsis sib xws ntawm semiconductor. Nws yog ib qho yooj yim thiab tswv yim ntsuas ntsuas.
(1) Ua ntej siv multimeter, nws yog ib qho tsim nyog yuav tsum tau ua qhov "mechanical zeroing", uas txhais tau hais tias thaum tsis muaj lub zog ntsuas, lub ntsuas ntsuas ntsuas yuav tsum muab tso rau ntawm xoom voltage lossis xoom tam sim no txoj haujlwm.
(2) Thaum lub sij hawm siv multimeter, tsis txhob kov cov hlau ntawm qhov kev sojntsuam nrog koj txhais tes. Qhov no ua kom qhov ntsuas qhov tseeb thiab kev nyab xeeb ntawm tus kheej.
(3) Thaum ntsuas qee qhov hluav taws xob, nws tsis raug nquahu kom hloov cov iav tib lub sijhawm, tshwj xeeb tshaj yog thaum ntsuas qhov hluav taws xob siab lossis siab tam sim no. Txwv tsis pub, nws yuav ua puas lub multimeter. Yog tias koj xav tau hloov cov iav, txiav qhov kev sojntsuam ua ntej thiab tom qab ntawd ntsuas tom qab hloov cov iav.
(4) Thaum siv multimeter, nws yuav tsum tau muab tso rau kab rov tav kom tsis txhob muaj qhov yuam kev. Nyob rau tib lub sijhawm, nws tseem ceeb heev kom tsis txhob muaj kev cuam tshuam ntawm sab nraud magnetic teb ntawm multimeter.
(5) Tom qab siv lub multimeter, qhov hloov pauv hloov yuav tsum tau teem rau qhov siab tshaj plaws AC voltage teeb. Yog tias tsis siv lub sijhawm ntev, lub roj teeb hauv lub tshuab hluav taws xob yuav tsum tau muab tshem tawm kom tsis txhob muaj kev sib txhuam ntawm lwm cov khoom hauv lub ntsuas.
Thaum siv ib qho analog multimeter, ntxig ib kawg ntawm txhua qhov ntsuas ntsuas rau hauv qhov ntsuas qhov kawg raws li qhov xav tau ntawm liab mus rau qhov zoo (+) thiab dub rau qhov tsis zoo (-), thiab tom qab ntawd paub meej tias tus pointer puas nyob hauv "0" txoj haujlwm. Tus pointer yuav tsum tau ua raws li cov kab kawg ntawm sab laug ntawm lub dial. Yog tias nws tsis sib xws, xoom hloov yuav tsum tau ua. Ua ntej ntsuas qhov tam sim no thiab qhov hluav taws xob, nws yog ib qho tsim nyog yuav tsum kwv yees qhov ntau ntawm qhov tam sim no thiab qhov hluav taws xob yuav tsum ntsuas, muab tso rau hauv lub iav loj dua ua ntej, thiab tom qab ntawd kho nws mus rau qhov tsim nyog iav kom tsis txhob muaj hluav taws kub ntau dhau ntawm lub multimeter.
Thaum ntsuas, qhov cuam tshuam sab hauv ntawm lub multimeter yuav tsum raug txiav txim siab. Piv txwv li, txhawm rau ntsuas qhov hluav taws xob, qhov kev sojntsuam yuav tsum tau txuas nrog lub voj voog uas raug kuaj. Lub sijhawm no, tam sim no tseem ntws los ntawm cov resistor hauv multimeter, uas muaj qee yam cuam tshuam rau qhov ntsuas tus nqi. Thaum ntsuas qhov hluav taws xob ntawm tib lub ntsiab lus, yog tias siv lub zog sib txawv, qhov kev tiv thaiv sab hauv ntawm multimeter yuav txawv, thiab qib ntawm kev cuam tshuam kuj yuav txawv.
Thaum ntsuas transistor hluav taws xob circuits, nws yog qhov zoo dua los xaiv ib qho kev tiv thaiv sab hauv ntawm 20k Ω / V hauv DC hom, uas feem ntau qhia rau ntawm lub xov tooj multimeter. Tsis tas li ntawd, cov khoom siv hluav taws xob feem ntau yuav tsum ntsuas qhov ntsuas qhov ntsuas qis, xws li 0.1V, thiab cov khoom siv hluav taws xob xaiv yuav tsum muaj qhov ntsuas ntau ntawm 1V.
