Yuav ua li cas siv ib tug multimeter los xyuas cov khoom siv hluav taws xob?
Thaum twg lub rooj tsav xwm Circuit Court tsis tuaj yeem ua haujlwm raws li cov xwm txheej ib txwm muaj, tom qab kuaj xyuas lub Circuit Court thiab tsis muaj teeb meem, nws muaj feem ntau tias cov khoom siv hluav taws xob tawg rau lub sijhawm no. Yog tias koj xav kho nws, koj yuav tsum nrhiav qhov teeb meem tiv thaiv thiab hloov nws, tab sis qhov teeb meem tivthaiv yog pom tias nws yog ib qho kev ua haujlwm thiab muaj qee yam kev txawj ntse. Niaj hnub no kuv yuav qhia koj yuav ua li cas siv lub multimeter los kuaj xyuas qee yam khoom siv hluav taws xob.
Kev kuaj pom tsis kam
Txoj hauv kev ncaj qha tshaj plaws los ntsuas qhov tsis kam yog siv cov ntaub ntawv multimeter resistance los ntsuas. Feem ntau, qhov loj me me yuav raug cim rau ntawm qhov tsis kam. Xaiv cov ntaub ntawv tiv thaiv tsim nyog thiab txuas cov kev xeem liab thiab dub ua rau ob qho kawg. Yog qhov kev nyeem ntawv kaw, nws yog qhov qub, txwv tsis pub nws tawg. Thaum ua kev tawm tsam, ceev faj tsis txhob kov cov liab thiab dub kev xeem coj nrog ob txhais tes. Nws tsis yog qhov txaus ntshai, tab sis kom ntseeg tau qhov tseeb ntawm qhov ntsuas kev tiv thaiv. Nws yog qhov zoo los kov ib qho ntawm cov kev xeem coj nrog koj txhais tes.
Tsau Capacitor Detection
Ntxiv nrog rau kev siv lub tshuab multimeter los xaiv qhov tsim nyog ntau yam ntawm lub peev xwm thaiv los ntsuas tus nqi capacitance, koj tuaj yeem siv cov ntaub ntawv tiv thaiv los ntsuas. Thaum ntsuas, xaiv cov ntaub ntawv tiv thaiv tsim nyog. Siv ob txoj kev xeem coj los txuas ob tus pins ntawm lub capacitor. Tus nqi kuj yuav tsum yog infinite. Yog hais tias tus nqi kuj yog 0, lub capacitor puas lawm.
Electrolytic Capacitor Detection
Txoj kev ntsuas ntawm electrolytic capacitor yog qhov txawv me ntsis ntawm qhov ruaj khov capacitor. Tau kawg, koj tuaj yeem xaiv siv cov thaiv thaiv kom pom. Sawv daws paub qhov no. Cia kuv tham txog txoj kev siv hluav taws xob thaiv los ntsuas. Ua ntej, xaiv cov ntaub ntawv tiv thaiv tsim nyog, thiab cov ntawv xeem liab thiab cov tshuaj ntsuam dub raws li kov lub capacitor. Ob tug ncej, nyob rau lub sij hawm no, tus nqi tso tawm yuav nce ntawm {{0}} mus txog rau thaum lub cim overflow 1 tshwm. Yog hais tias nws ib txwm qhia 0, nws txhais tau hais tias lub capacitor yog luv luv-circuited sab hauv. Yog tias nws ib txwm qhia 1, nws txhais tau tias lub capacitor qhib. Nws yuav tsum tau muab sau tseg tias thaum ntsuas, vim hais tias cov electrolytic capacitor muaj qhov zoo thiab qhov tsis zoo, nws yuav tsum tsis txhob thim rov qab ntawm no. Feem ntau, cov hlau kuaj liab txuas nrog lub anode ntawm lub capacitor (tus uas muaj ob txhais ceg ntev), thiab cov hlau kuaj dub txuas nrog lub cathode ntawm lub capacitor (tus uas muaj ob txhais ceg luv). , tus pointer multimeter yog qhov opposite.
Kev kuaj xyuas inductance
Tsis tas li ntawd xaiv cov iav tiv thaiv ntawm lub multimeter, thiab txuas qhov kev xeem ua rau ob qho kawg ntawm inductor. Yog tias qhov ntsuas qhov ntsuas tsis zoo yog xoom, lub inductor luv luv-circuited sab hauv. Nyob rau hauv ib txwm muaj xwm txheej, DC tsis kam ntawm qhov ntsuas inductor yog tib yam li txoj kab uas hla ntawm cov hlau enameled siv los cua inductor coil, thiab cov hlau winding coil. Tus lej muaj kev sib raug zoo ncaj qha, tsuav yog qhov ntsuas tus nqi kuj tuaj yeem ntsuas, qhov inductance tuaj yeem suav tias yog qhov qub.
Diode nrhiav pom
Kho lub multimeter mus rau qhov ntsuas diode iav, txuas lub anode ntawm diode nrog cov hlau kuaj liab, thiab txuas cov cathode ntawm diode nrog cov hlau lead dub. Yog hais tias qhov hluav taws xob poob ntawm lub diode tshwm rau ntawm lub vijtsam zaub (feem ntau yog {{{0}}}.5 rau lub raj silicon thiab 0.2 rau lub germanium raj), nws txhais tau hais tias lub diode yog ib txwm. Hloov cov kev xeem coj, yog tias cov zaub qhia 1, nws yog qhov qub, txwv tsis pub nws yuav tawg, yog tias ob qhov kev ntsuam xyuas yog 0 lossis 1, nws txhais tau tias lub diode puas lawm.
LED pom
Tsis tas li ntawd kho cov digital multimeter mus rau qhov ntsuas diode thaiv, kov lub anode ntawm lub teeb-emitting diode nrog cov xim liab test lead, thiab kov lub cathode ntawm lub teeb-emitting diode nrog cov dub test lead (tib yam li diode saum toj no), yog tias koj pom nws glowing, nws txhais tau tias ib txwm, txwv tsis pub nws puas.
