Qhov twg multimeter yog tsim nyog rau kev siv tu, MF30 lossis MF50
Kev ceev faj rau kev siv multimeter
(1) Ua ntej siv multimeter, nws yog ib qho tsim nyog yuav tsum tau ua "kev hloov kho xoom xoom", uas txhais tau hais tias thaum tsis muaj hluav taws xob ntsuas, lub ntsuas ntsuas ntsuas yuav tsum tau muab tso rau ntawm xoom voltage lossis xoom tam sim no.
(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 pom zoo kom hloov cov iav ib txhij, tshwj xeeb tshaj yog thaum ntsuas qhov hluav taws xob siab lossis siab tam sim no. Txwv tsis pub, nws yuav ua rau muaj kev puas tsuaj rau lub multimeter. Yog tias koj xav tau hloov cov iav, koj yuav tsum xub txiav qhov kev sojntsuam thiab hloov cov iav ua ntej ntsuas.
(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, kev saib xyuas yuav tsum tau them nyiaj kom tsis txhob muaj kev cuam tshuam ntawm sab nraud magnetic teb ntawm multimeter.
(5) Tom qab siv lub multimeter, qhov hloov pauv yuav tsum muab tso rau ntawm qhov siab tshaj plaws AC voltage txoj hauj lwm. Yog tias tsis siv sijhawm ntev, lub roj teeb hauv lub tshuab hluav taws xob yuav tsum tau muab tshem tawm los tiv thaiv lub roj teeb los ntawm corroding lwm yam khoom hauv lub ntsuas.
Kev siv Ohm iav
1, Xaiv qhov tsim nyog magnification. Thaum ntsuas qhov tsis kam nrog lub ohmmeter, qhov kev nthuav dav tsim nyog yuav tsum raug xaiv kom tus pointer qhia ze rau tus nqi nruab nrab. Nws yog qhov zoo tshaj plaws tsis txhob siv sab laug thib peb ntawm qhov ntsuas, vim qhov no ntawm qhov ntsuas yog ntom ntom.
2, Kho rau xoom ua ntej siv.
3, Tsis tuaj yeem ntsuas nrog hluav taws xob.
4, Kev ntsuas ntsuas tsis tuaj yeem muaj cov ceg sib txuas.
5, Thaum ntsuas qhov sib npaug ntawm cov khoom siv polar xws li transistors thiab electrolytic capacitors, yuav tsum tau them nyiaj rau qhov polarity ntawm ob tus cwj mem.
6, Thaum ntsuas qhov sib npaug ntawm qhov tsis sib xws ntawm cov khoom tsis sib xws nrog qhov sib txawv ntawm qhov sib txawv ohm lub zog ntawm lub tshuab multimeter, qhov ntsuas qhov ntsuas tsis sib txawv. Qhov no yog vim qhov nruab nrab tsis kam thiab tag nrho cov nplai tam sim no ntawm txhua lub iav sib txawv. Nyob rau hauv mechanical meters, qhov me dua qhov magnification, qhov me me ntawm qhov ntsuas tsis kam.
Thaum ntsuas DC nrog multimeter
1, Ua txhua yam xoom hloov kho.
2, Xaiv cov khoom tsim nyog.
3, Thaum ntsuas tam sim no siv lub tshuab ntsuas tam sim no, lub tshuab hluav taws xob yuav tsum tau txuas nrog hauv cov kab hauv qhov ntsuas hluav taws xob, vim tias tsuas yog kev sib txuas sib txuas tuaj yeem ua rau tam sim no ntws los ntawm ammeter sib npaug rau cov ceg ntsuas tam sim no. Thaum ntsuas, cov ceg ntsuas yuav tsum raug txiav thiab cov xov tooj liab thiab dub ntawm lub multimeter yuav tsum tau txuas nrog hauv cov kab ntawm ob lub ntsiab lus txiav. Kev saib xyuas tshwj xeeb yuav tsum tau them rau qhov tseeb tias lub ammeter tsis tuaj yeem txuas mus rau qhov sib npaug mus rau qhov ntsuas hluav taws xob, vim qhov no yog qhov txaus ntshai heev thiab tuaj yeem ua rau lub multimeter hlawv tawm.
4, Ua tib zoo saib cov polarity ntawm ntsuas hluav taws xob kom muaj nuj nqis.
5, Kev siv cov nplais thiab kev nyeem kom raug.
6, Thaum xaiv 2.5A ntau yam siv tam sim no ncaj qha, lub ntsuas hluav taws xob liab ntawm lub ntsuas hluav taws xob yuav tsum tau muab tso rau hauv 2.5A ntsuas qhov (socket), thiab qhov hloov pauv tuaj yeem muab tso rau ntawm txhua qhov ntawm qhov ncaj qha tam sim no.
7, Yog tias ntsuas DC tam sim no ntau dua 2.5A, 2.5A iav tuaj yeem txuas mus rau 5A iav. Txoj kev no yooj yim heev. Tus neeg siv tuaj yeem txuas tus 0.24 ohm resistor ntawm "2.5A" qhov (socket) thiab lub qhov (socket) dub, yog li cov iav no dhau los ua 5A tam sim no iav. Lub 0.24A resistor yuav tsum tau xaiv nrog ib tug hlau qhov txhab resistor tshaj 2W. Yog hais tias lub zog tsawg dhau, nws yuav hlawv.
