Yuav ua li cas siv ib tug multimeter
Multimeter yog ib qho tseem ceeb ntawm cov cuab yeej ntsuas hauv kev tsim hluav taws xob. Nws muaj ntau yam haujlwm xws li ntsuas tam sim no, voltage thiab tsis kam.
Tshooj lus no yuav qhia txog cov qauv ntawm multimeter thiab yuav ua li cas siv lub multimeter. Cov tub ntxhais kawm yuav tsum ua haujlwm hnyav los kawm siv lub tshuab multimeter.
1. Saib xyuas thiab nkag siab txog cov qauv ntawm multimeter.
Muaj ntau hom multimeters nrog cov duab sib txawv, tab sis cov qauv tsim thiab kev siv yog tib yam. Cov qauv thiab cov duab ntawm cov multimeters uas nquag siv tau pom nyob rau hauv cov duab kos rau ntawm nplooj ntawv xim.
Ntawm lub vaj huam sib luag ntau lub hom phiaj, yuav tsum muaj lub taub hau 'meter' thiab xaiv qhov hloov pauv. Kuj tseem muaj ohm iav xoom hloov kho pob qhov rooj thiab qhov ntsuas cov hlau lead. Cov haujlwm ntawm txhua ntu tau piav qhia hauv qab no:
(1) Lub taub hau
Lub taub hau ntawm multimeter yog rhiab heev galvanometer. Lub dial ntawm lub taub hau yog luam tawm nrog ntau yam cim, kab kab thiab cov lej muaj nuj nqis (raws li pom hauv daim duab 3-4(B)). Lub cim AV-Ω qhia tias qhov ntsuas no yog ib lub ntsuas ntsuas uas tuaj yeem ntsuas tam sim no, qhov hluav taws xob thiab tsis kam. Muaj ntau cov kab scale luam tawm ntawm lub dial. Qhov ntsuas ntsuas kab cim nrog "Ω" ntawm sab xis kawg yog xoom ntawm sab xis kawg thiab ∞ ntawm sab laug kawg. Kev faib tawm ntawm qhov ntsuas qhov ntsuas tsis sib npaug. Lub cim "-" lossis "DC" txhais tau hais tias ncaj qha tam sim no, "-" lossis "AC" txhais tau tias hloov pauv tam sim no, thiab "-" txhais tau tias cov kab sib faib los ntawm kev hloov tam sim no thiab ncaj qha tam sim no. Cov kab ntawm cov lej nyob rau hauv kab kab yog qhov ntsuas qhov tseem ceeb sib raug rau cov haujlwm sib txawv ntawm tus xaiv hloov.
Kuj tseem muaj lub tshuab xoom hloov kho pob qhov rooj ntawm lub taub hau saib kom kho tus pointer mus rau xoom ntawm sab laug kawg.
(2) Xaiv qhov hloov pauv
Lub selector hloov ntawm lub multimeter yog ib tug ntau txoj hauj lwm teb hloov. Siv los xaiv cov khoom ntsuas thiab thaj tsam. (Raws li pom hauv daim duab 3-4(B)). General multimeter ntsuas cov khoom suav nrog: "mA"; DC tam sim no, "V": DC voltage, "V": AC voltage, "Ω": Kuj. Txhua yam khoom ntsuas tau muab faib ua ntau yam sib txawv rau kev xaiv.
(3) Ntsuas cwj mem thiab ntsuas cwj mem
Cov cwj mem xeem tau muab faib ua xim liab thiab dub. Thaum siv, cov hlau lead kuaj liab yuav tsum tau muab tso rau hauv lub jack cim nrog "ntxiv", thiab cov hlau kuaj dub yuav tsum muab tso rau hauv lub jack cim nrog "-".
2. Yuav siv lub multimeter li cas
(1) Ua ntej siv lub multimeter, nws yuav tsum tau ua:
1. Lub multimeter muab tso rau kab rov tav.
2. Txheeb xyuas tias ob txhais tes nres ntawm xoom txoj hauj lwm ntawm sab laug kawg ntawm lub dial. Yog tias muaj qhov sib txawv, siv lub taub hau me me los maj mam tig lub tshuab xoom hloov kho pob qhov rooj ntawm lub taub hau saib kom lub moos taw tes rau xoom.
3. Ntxig qhov kev xeem coj mus rau hauv cov khoom siv lead ua raws li qhov xav tau saum toj no.
4. Tig lub selector hloov mus rau cov khoom sib xws thiab ntau yam. yog npaj siv.
(2) Tom qab siv multimeter, nws yuav tsum tau ua:
1. Rub tawm cov kev xeem coj.
2. Tig lub selector hloov mus rau txoj haujlwm "OFF", yog tias tsis muaj txoj haujlwm zoo li no, nws yuav tsum tig mus rau qhov siab tshaj plaws ntawm AC voltage, xws li "1000V dua".
