Siv ib lub multimeter los xyuas cov faulty circuits thiab nrhiav faulty Cheebtsam
Niaj hnub no kuv yuav qhia koj ib txoj hauv kev yooj yim los siv lub multimeter los txiav txim seb cov khoom puas raug hlawv tawm thiab seb nws puas yuav tsum tau hloov.
Lub multimeter peb siv
Hnub no kuv yuav muab lub xov tooj txawb charger tawg ua piv txwv los piav qhia rau koj. Lub charger tawg no yuav tsum tau tshwm sim los ntawm cov khoom siv tam sim no ntau dhau thaum ua haujlwm, uas ua rau cov khoom tawg ntawm PCB thiab ua rau qee cov khoom siv hluav taws xob ncaj qha. .
Nyob rau sab xis ntawm daim duab ntawm sab nraub qaum, peb tuaj yeem pom tias cov solder ntawm PCB tau yaj pom tseeb. Tsis muaj txoj hauv kev ncaj qha los txheeb xyuas qhov teeb meem zoo li no nrog multimeter. Qhov tshwm sim no kuj pom tseeb. Nws tuaj yeem pom ntawm ib nrais muag. Ib txoj hlua tau kos los ntawm qhov kawg melted thiab reattached.
Hauv daim duab nyob rau pem hauv ntej, koj tuaj yeem pom meej meej tias lub capacitor nyob rau hauv lub rooj tsavxwm tau pom tseeb bulged, qhia tias nws tau raug hlawv. Tau kawg, peb tuaj yeem tshawb xyuas nws nrog multimeter. Muaj ib tug me me capacitor nyob rau sab xis ntawm lub bulged capacitor, uas zoo nkaus li tiav. Kuv tsis paub tias nws puas lawm, yog li peb siv ib lub multimeter los kuaj ob qhov me me no.
kev kuaj xyuas capacitance
Kauj ruam 1: Kho lub multimeter mus rau lub capacitor hom kom xaiv qhov tsim nyog
Kauj Ruam 2: Muab qhov kev xeem coj ntawm lub multimeter rau ntawm ob qho kawg ntawm ob tus pins
Tom qab kuaj nrog lub multimeter, peb tuaj yeem pom meej tias lub capacitor me me ntsuas los ntawm qhov ntsuas. Nyeem cov lus qhia ntawm lub multimeter, thiab tom qab ntawd sib piv cov nqi tiag tiag uas cim rau ntawm lub capacitor. Yog tias ob qhov tseem ceeb nyob ze, ces lub capacitor yog qhov qub. Peb lub capacitor yog cim 10uf, thiab qhov ntsuas tus nqi ntawm 13.8uf tuaj yeem hais tias nyob ze.
Saib ntawm daim duab thib ob dua, koj tuaj yeem pom tseeb tias qhov taw qhia ntawm lub multimeter yog xoom ncaj qha, uas yog txaus los qhia tias lub capacitor ntawm lub nruas yog qhov tseeb hlawv, yog tias koj xav kho nws, nrhiav lub capacitor nrog tib yam tsis muaj. los hloov qhov no.
Diode nrhiav pom
Tom qab tham txog lub capacitance, cia peb tham txog kev kuaj pom ntawm diode. Txoj kev tshawb nrhiav diode yog me ntsis yooj yim dua li qhov ntsuas qhov ntsuas, vim tias peb lub multimeter muaj lub diode thaiv, thiab tsuas muaj ib txoj haujlwm xwb, yog li peb tsis tas yuav xav txog qhov teeb meem ntawm ntau yam. Peb kho nws rau lub diode thaiv. , thiab ces txuas lub anode ntawm lub multimeter mus rau lub anode ntawm lub diode, thiab txuas lub cathode ntawm multimeter mus rau lub anode ntawm lub diode. Yog tias koj pom kev nyeem ntawv ntawm cov zaub ntawm multimeter, nws txhais tau hais tias lub diode hauv Circuit Court yog qhov qub (qee lub multimeters yuav beep), thiab lawv tsis puas. kev tawg.
Kev kuaj xyuas inductance
Inductance yog ib qho tseem ceeb heev nyob rau hauv lub xov tooj ntawm tes chargers, yuav luag txhua txhua charger yog indispensable, yog li peb kuj yuav tsum tau kawm ib txoj kev los xyuas inductance, "inductance" peb kawm nyob rau hauv high school, inductance yog sib npaug rau luv luv Circuit Court rau DC, peb no tuaj yeem muab tso rau kev siv zoo ua ke nrog lub diode thaiv ntawm lub multimeter.
Peb txhua tus paub tias yog tias lub diode thaiv qhov kev kuaj liab thiab dub coj ncaj qha mus rau lub multimeter, nws yuav ua suab nrov, thiab yog tias nws tsis txuas nrog, nws yuav tsis ua suab nrov. Ntxiv rau qhov tsis ringing, tsuas muaj lub cim diode nyob rau sab xis sab xis ntawm lub multimeter's zaub.
Tom ntej no, peb txuas lub multimeter mus rau ob sab ntawm inductor, thiab tom qab ntawd saib cov kev hloov pauv ntawm cov zaub nyob rau sab xis sab xis ntawm lub multimeter zaub.
Puas muaj lwm lub cim zoo ib yam li lub teeb liab ntawm lub xov tooj ntawm tes? Nws txhais tau hais tias qhov inductance yog qhov qub thiab tsis muaj qhov qhib Circuit Court. Thaum qhov tshwm sim no tshwm sim, koj tseem yuav hnov cov buzzer beeping. Lub sijhawm no, peb tuaj yeem paub tseeb tias qhov inductance yog qhov qub. .
