Xyuas ua ntej ntsuas nrog ib tug multimeter
Multimeter yog ib qho khoom siv ntau yam, ntau qhov ntsuas ntsuas uas yog qhov tseem ceeb hauv kev siv tshuab hluav taws xob thiab hluav taws xob. Feem ntau, multimeters tuaj yeem ntsuas DC tam sim no, DC voltage, AC tam sim no, AC voltage, tsis kam thiab suab qib. Qee qhov tseem tuaj yeem ntsuas qhov capacitance, inductance thiab qee qhov ntsuas ntawm semiconductors (xws li ). Yog tias tsuas yog qhov txawv ntawm hom zaub, multimeters tuaj yeem muab faib ua analog multimeters thiab digital multimeters.
Peb lub luag haujlwm tseem ceeb ntawm multimeter yog ntsuas qhov ua haujlwm, qhov hluav taws xob, thiab tam sim no, yog li cov neeg siv sijhawm qub hu nws lub ntsuas peb lub hom phiaj. Niaj hnub no cov multimeters tau ntxiv ntau txoj haujlwm tshiab, tshwj xeeb tshaj yog digital multimeters, xws li ntsuas tus nqi capacitance, triode amplification, diode voltage poob, thiab lwm yam. Kuj tseem muaj cov lus hais digital multimeter uas tuaj yeem tshaj tawm cov txiaj ntsig ntsuas hauv hom lus.
Cov kauj ruam
Xyuas seb lub roj teeb hluav taws xob thiab lub zog hluav taws xob puas zoo li qub thiab seb lub roj teeb lub taub hau puas muaj xeb heev. Ntau tus tswv tsheb xav tias qhov tshwm sim ntawm cov dej xau yog teeb meem roj teeb lossis teeb meem lub tshuab hluav taws xob;
Nug tus tswv lub tsheb seb puas muaj kev kho tshiab, kev teeb tsa, lossis kev sib tsoo thiab kev teeb tsa;
Tshem tawm lub davhlau ya nyob twg tsis zoo ntawm lub roj teeb, teeb lub multimeter mus rau qhov chaw siab tshaj plaws tam sim no, txuas cov kev kuaj liab ua rau cov hlau tsis zoo, thiab txuas cov kev ntsuam xyuas dub coj mus rau lub taub hau roj teeb thiab ruaj ntseg;
Tshem tawm tag nrho cov khoom siv hluav taws xob sab hauv thiab sab nraud ntawm lub tsheb, xauv lub qhov rooj, saib xyuas qhov tam sim no, kho nws mus rau lub iav tsim nyog, thiab kaw nws;
Tos li 20 feeb; Tom qab tag nrho cov modules ntawm lub tsheb nkag mus rau hauv lub xeev pw tsaug zog, nyeem qhov tseeb static tawm tam sim no;
Lub quiescent tam sim no feem ntau yog 0.03A (piv txwv li 30mA), thov mus saib phau ntawv saib xyuas kom paub meej, thiab nws tsis tshaj 50mA;
Yog hais tias qhov quiescent tam sim no loj dhau (raws li qhia hauv daim duab saum toj no), peb tuaj yeem tshawb xyuas los ntawm rub tawm cov fuses thiab relays, uas yog, rub tawm cov fuses ib qho los ntawm ib qho thiab saib xyuas qhov loj ntawm qhov quiescent tam sim no;
Xyuas ua ntej ntsuas
Saib seb lub koob multimeter tau teem rau {{0}}. Yog tias nws tsis nyob ntawm 0 txoj hauj lwm, tig lub xoom hloov ntsia hlau los teeb rau 0 txoj hauj lwm.
Tshawb xyuas qhov ncaj ncees ntawm ob qhov kev xeem coj thiab coj. Qhov no yog ib qho tseem ceeb tshwj xeeb tshaj yog thaum ntsuas AC voltages siab dua los tiv thaiv kev sib tsoo hluav taws xob.
Tshawb xyuas cov hlau lead thiab ceev nws yog tias nws xoob. Qee lub sij hawm lub looseness yog tshwm sim los ntawm loosening ntawm cov txiv ntoo fastening ntawm lub jack. Lub sijhawm no, lub rooj saib xyuas yuav tsum tau kho.
