Ntsuas qhov zoo ntawm capacitance nrog digital universal meter
1) Kev txiav txim zoo los yog phem
Kauj Ruam 1: Xaiv lub iav. Tig lub hloov pauv hloov ntawm digital multimeter mus rau lub iav cim nrog "Ω", thiab xaiv cov iav ntau ntawm "diode nrog buzzer".
Kauj Ruam 2: Tshawb xyuas cov haujlwm. Ob qhov kev sojntsuam tsis paub qhov txawv ntawm qhov zoo thiab qhov tsis zoo, tab sis kov ob tus pins ntawm lub capacitor cais. Thaum lub sijhawm no, tus lej tso tawm ntawm lub vijtsam LCD sai sai thiab tam sim ntawd qhia cov cim pib (tseem hu ua "overflow symbol") "1", thiab tom qab ntawd hloov tus cwj mem los sim dua. Thaum lub sijhawm no, lub cim tsis zoo "~" tshwm sim ua ntej tus lej tso tawm ntawm lub vijtsam LCD, thiab tom qab ntawd tus lej nrawm nrawm, nrog lub cim pib "1" tshwm. Qhov xwm txheej saum toj no qhia tau hais tias cov txheej txheem them nyiaj rau pem hauv ntej thiab rov qab ntawm qhov ntsuas capacitor yog qhov qub thiab zoo. Yog tias thaum lub sijhawm kuaj cov txheej txheem saum toj no, tus lej tso tawm ntawm lub vijtsam LCD tsis tuaj yeem tso tawm "1" tom qab flashing sai, thiab muaj kev nyeem ntawv tsis ruaj khov txhua lub sijhawm, nws qhia tau hais tias lub capacitor kuaj tau xau; Yog tias lub vijtsam LCD qhia "0" (los yog ze rau "0") thaum lub sij hawm ob qhov kev ntsuam xyuas ntawm kev sib hloov probes thiab lub buzzer tseem nrov, nws qhia tau hais tias lub capacitor kuaj tau luv luv circuited; Yog tias tsuas yog lub cim hla dhau "1" tshwm sim yam tsis muaj cov txheej txheem flashing ntawm cov lej, nws qhia tau tias qhov ntsuas hluav taws xob tau qhib Circuit Court.
Lus Cim: Rau cov capacitors uas muaj peev xwm loj dua, thaum ob qhov kev sojntsuam kov cov pins ntawm ob qho kawg ntawm lub capacitor, lub buzzer yuav muaj cov txheej txheem suab luv. Qhov loj dua lub peev xwm ntawm lub capacitor, ntev lub buzzer yuav suab. Qhov no yog vim hais tias thaum pib ntawm lub peev xwm loj capacitor, ib tug loj npaum li cas ntawm heterogeneous nqi txav mus rau hauv ob daim hlau ntawm lub capacitor nyob rau hauv Circuit Court, uas ua rau ib tug ntau dua tam sim no thiab qis impedance nyob rau hauv lub Circuit Court. Yog li, thaum kuaj cov capacitors nrog lub peev xwm loj dua, lub sij hawm qhov kev sojntsuam tiv tauj lub capacitor pins yuav tsum tsis txhob luv dhau, txwv tsis pub nws yuav ua rau kev txiav txim tsis raug.
Kauj Ruam 3: Tshawb xyuas thiab txiav txim seb puas muaj cov dej xau.
Thaum qhov kev tshawb pom ntawm cov kauj ruam thib ob saum toj no ua tiav thiab cov txheej txheem digital flicker ntawm lub vijtsam LCD ntawm lub tshuab hluav taws xob digital tau ua tiav, thiab tsuas yog lub cim hla dhau "1" raug tso tawm thiab tsis hloov lawm, nws qhia tau hais tias cov txheej txheem them nqi ntawm kev sim. capacitor tau tas lawm, thiab twb muaj qhov cia li ntawm 2.6V ntawm ob qhov kawg (qhov voltage no yog qhov voltage ntawm ob qhov kev sojntsuam ntawm digital multimeter thaum siv lub diode iav). Thaum lub sijhawm no, tshem tawm cov hlau lead ntawm tus pin ntawm lub capacitor, thiab tom qab ntawd tig qhov hloov pauv ntawm digital multimeter mus rau DC voltage ntsuas ntau yam cim nrog "V -". Xaiv qhov 20V ntau yam, thiab tom qab ntawd kov ob lub taub hau ntawm lub capacitor cais kom pom lub zog cia hluav taws xob ntawm ob qho kawg. Los ntawm kev soj ntsuam qhov ceev ntawm qhov voltage tus nqi ntawm lub vijtsam LCD txo qis, ib tus tuaj yeem txiav txim siab seb qhov ntsuas ntsuas capacitor puas. Yog hais tias qhov kev nyeem ntawv voltage maj mam txo qis ntawm tus nqi qis heev, nws qhia tau hais tias lub zog khaws cia ntawm lub capacitor maj mam tso tawm los ntawm "internal resistance", qhia tias tsis muaj qhov tshwm sim los ntawm qhov ntsuas capacitor; Yog hais tias qhov kev nyeem ntawv voltage poob sai thiab sai sai poob rau 0, nws qhia tau hais tias lub ntsuas capacitor muaj to thiab tsis tuaj yeem siv txuas ntxiv hauv Circuit Court.
2) Kev txiav txim siab seb puas muaj peev xwm hloov tau
Kauj Ruam 1: Siv lub tshuab hluav taws xob hluav taws xob, txuas cov pins ntawm ob qho kawg ntawm lub capacitor nrog cov xov hlau los pab txhawb kev nkag mus rau hauv lub ntsuas ntsuas lub qhov (socket) ntawm digital multimeter.
Kauj Ruam 2: Kev ua haujlwm ntawm kev kuaj pom muaj peev xwm. Tig qhov hloov pauv hloov ntawm digital multimeter mus rau qhov ntsuas lub peev xwm ntsuas qhov ntsuas qhov ntsuas "F", thiab tom qab ntawd xaiv qhov ntau yam tsim nyog raws li lub peev xwm nominal ntawm lub capacitor kuaj. Tom qab ntawd kov cov elongated capacitor pins nrog ib leeg ob peb zaug kom tso tawm, thiab tom qab kev ua haujlwm tawm, ntxig ob tus pins rau hauv ob lub qhov (socket) uas sau tias "cx". Vim qhov sib txawv ntawm qhov zoo thiab qhov tsis zoo ntawm ob lub strip jacks, thaum muab cov pins capacitor, qhov zoo thiab qhov tsis zoo polarity ntawm qhov ntsuas electrolytic capacitor yuav tsum tau ua raws li cov cim "ntxiv" thiab "-" cim rau ntawm lub jacks kom paub meej qhov ntsuas qhov tseeb. .
Kauj Ruam 3: Ua ib qho kev txiav txim raws li kev nyeem ntawv.
Tom qab kev nyeem ntawv tso tawm ntawm LCD npo stabilizes tom qab lub sijhawm luv luv, qhov zoo ntawm lub capacitor tuaj yeem txiav txim siab raws li qhov sib txawv ntawm lub peev xwm nominal thiab kev nyeem ntawv. Vim qhov kev tso cai yuam kev ntau ntawm niobium thiab tantalum electrolytic capacitors yog ± 10 feem pua, yog tias qhov kev nyeem ntawv tso tawm tseem nyob ruaj khov nyob rau hauv qhov kev tso cai yuam kev, nws qhia tau tias qhov ntsuas capacitor zoo; Yog tias qhov kev nyeem ntawv tsawg dhau los piv rau lub peev xwm nominal, nws qhia tau tias lub peev xwm ntawm lub capacitor tau hloov pauv thiab siv tsis tau ntxiv lawm; Yog tias lub cim overflow "1" tsis tshwm nyob rau ntawm lub vijtsam LCD thaum pib, nws qhia tau hais tias lub hauv paus ntawm lub capacitor puas lawm los yog cov electrolyte qhuav, thiab lub peev xwm tau ploj tag nrho; Yog tias qhov kev nyeem ntawv qhia tias "0" lossis ze rau "0" thiab lub buzzer tseem nrov, nws qhia tau hais tias lub ntsuas ntsuas ntsuas muaj qhov luv luv.
