Yuav ua li cas ntsuas peb-theem hluav taws xob theem poob nrog multimeter
Peb-theem hluav taws xob theem poob txhais tau hais tias ib lossis ob ntawm peb theem kab tsis muaj hluav taws xob. Thaum cov neeg siv hluav taws xob siv hluav taws xob, yog tias tsuas yog ib theem xaim raug coj mus, thiab nws tshwm sim tias cov kab hluav taws xob theem no tawm ntawm theem, ces tus neeg siv kawg yuav muaj hluav taws xob. Yog tias nws yog cov khoom siv hluav taws xob peb-theem, nws tseem tuaj yeem siv tau tom qab ib theem ploj lawm, tab sis nws yuav ua rau tsis muaj zog voltage, uas yooj yim rau sawv los yog poob tam sim ntawd.
Peb-theem hluav taws xob theem poob, txoj kev ntsuas nrog multimeter
Multimeter los ntsuas theem poob
Hauv peb-theem hluav taws xob, qhov hluav taws xob ntawm theem kab mus rau hauv av thiab mus rau cov kab nruab nrab yog 220V. Siv cov ntaub ntawv voltage ntawm multimeter los ntsuas qhov voltage ntawm peb theem xaim thiab hauv av los yog nruab nrab xaim nyob rau hauv ib ntus. Raws li ib txwm muaj, nws yuav tsum yog li 220V. Yog tias qhov hluav taws xob yog 0 lossis qis dhau, nws ua pov thawj tias cov kab hluav taws xob yog tawm ntawm theem.
Qhov voltage ntawm cov kab theem yuav tsum yog li 380V. Ntsuas qhov voltage ntawm AB, AC, thiab BC nyob rau hauv lem. Yog tias qhov hluav taws xob tsawg dua 380V, nws ua pov thawj tias tsawg kawg ib qho ntawm ob theem ntsuas tau tawm ntawm theem.
Piv txwv li, yog tias qhov ntsuas hluav taws xob ntsuas los ntawm AB tsawg, nws ua pov thawj tias tsawg kawg yog ib qho ntawm ob theem A thiab B yog tawm ntawm theem. Tom qab ntawd ntsuas BC, yog tias qhov hluav taws xob zoo li qub, nws ua pov thawj tias theem A ploj lawm.
Kev ceev faj rau kev ntsuas DC tam sim no nrog multimeter
1. Ua raws li kev kho tshuab xoom.
2. Xaiv cov iav uas tsim nyog.
3. Thaum siv cov multimeter tam sim no thaiv los ntsuas qhov tam sim no, lub multimeter yuav tsum tau txuas nrog hauv series hauv qhov ntsuas hluav taws xob, vim tias tsuas yog cov kev sib txuas ntawm cov kab sib txuas tuaj yeem ua rau tam sim no ntws los ntawm ammeter tib yam li tam sim no ntawm ceg Circuit Court nyob rau hauv kev sim. Thaum ntsuas, ceg nyob rau hauv kev sim yuav tsum tau txiav, thiab cov liab thiab dub xeem coj ntawm lub multimeter yuav tsum tau txuas nrog nyob rau hauv series ntawm ob lub ntsiab lus uas lub quilt yog disconnected. Kev saib xyuas tshwj xeeb yuav tsum tau them rau qhov tseeb tias lub ntsuas hluav taws xob tam sim no tuaj yeem txuas mus rau qhov sib npaug hauv qhov ntsuas hluav taws xob ntsuas hluav taws xob, uas yog qhov txaus ntshai heev thiab tuaj yeem hlawv tawm lub multimeter yooj yim.
4. Ua tib zoo saib cov polarity ntawm cov hluav taws xob ntsuas.
5. Kev siv cov nplai thiab kev nyeem kom raug.
6. Thaum xaiv 2.5A ntau ntawm DC tam sim no, tus cwj mem liab ntawm multimeter yuav tsum tau muab tso rau hauv qhov ntsuas 2.5A, thiab qhov hloov pauv tuaj yeem muab tso rau ntawm txhua qhov ntawm DC tam sim no ntau yam.
7. Yog hais tias DC tam sim no ntsuas los ntawm lub quilt yog ntau tshaj 2.5A, lub 2.5A iav tuaj yeem nthuav dav mus rau 5A iav. Txoj kev no yooj yim heev, tus neeg siv tuaj yeem txuas tus 0.24 ohm resistor nruab nrab ntawm lub "2.5A" jack thiab cov khoom siv dub coj mus kuaj, kom lub iav dhau los ua 5A tam sim no iav. Qhov txuas txuas 0.24A resistor yuav tsum yog ib qho hluav taws xob tiv thaiv kab mob siab tshaj 2W. Yog lub hwj chim me dhau, nws yuav hlawv.
