Feem ntau faults thiab txij nkawm ntawm digital multimeter
(1) Yog tias tsis muaj cov khoom tso rau ntawm qhov ntsuas, ua ntej xyuas seb lub roj teeb hluav taws xob puas zoo li qub (feem ntau yog siv 9V roj teeb, thiab cov tshiab yuav tsum ntsuas). Thib ob, xyuas seb lub fuse puas tau tawg, seb qhov ntsuas hluav taws xob ruaj khov puas yog qhov qub, thiab seb qhov kev txwv tam sim no puas qhib. Tom qab ntawd, xyuas lub rooj tsav xwm hauv Circuit Court rau corrosion, luv Circuit Court, los yog qhib circuits (tshwj xeeb tshaj yog lub ntsiab fais fab Circuit Court). Yog hais tias yog li ntawd, ntxuav lub rooj tsavxwm Circuit Court thiab tam sim ntawd qhuav thiab weld nws; Yog tias lub rooj tsav xwm hauv Circuit Court yog qhov qub, ob lub pins ntawm lub hwj chim tawm tswv yim ntawm cov duab sib xyaw ua ke tuaj yeem ntsuas. Puas yog qhov ntsuas hluav taws xob zoo li qub? Yog tias qhov ntsuas hluav taws xob zoo li qub, qhov sib xyaw ua ke raug puas tsuaj thiab yuav tsum tau hloov pauv; Yog tias qhov ntsuas hluav taws xob tsis zoo li qub, tshawb xyuas lwm cov ntsiab lus luv luv? Yog tias muaj, nws yuav tsum tau ua raws sijhawm raws sijhawm; Yog tias nws tsis yog tam sim no lossis yog tias nws tseem tsis ua haujlwm zoo tom qab ua tiav, tom qab ntawd cov kev sib xyaw ua ke muaj qhov luv luv hauv Circuit Court thiab yuav tsum tau hloov.
(2) Tsis tuaj yeem ntsuas cov iav tiv thaiv. Ua ntej, pom kev tshuaj xyuas lub rooj tsav xwm Circuit Court. Puas muaj kev sib txuas lossis hlawv tawm tsis kam nyob rau hauv cov iav tiv thaiv Circuit Court? Yog tias muaj, nws yuav tsum tau hloov tam sim ntawd; Yog tias tsis yog, ntsuas txhua qhov txuas txuas thiab hloov cov khoom puas hauv lub sijhawm; Yog hais tias lub periphery yog ib txwm, lub ntsuas integrated block puas lawm thiab yuav tsum tau hloov.
(3) Qhov tsis raug lossis txawm tias tsis ruaj khov ntawm qhov ntsuas hluav taws xob thaum ntsuas hluav taws xob siab feem ntau yog tshwm sim los ntawm kev ua haujlwm tsis txaus ntawm ib lossis ntau yam khoom. Yog tias cov khoom no tau pom tias kub thaum kuaj xyuas tsis pub dhau ob peb feeb ntawm kev tso tseg qhov ntsuas, uas yog tshwm sim los ntawm thermal los ntawm lub zog tsis txaus, cov khoom (lossis kev sib xyaw ua ke) yuav tsum tau hloov.
(4) Qhov tsis muaj peev xwm ntsuas qhov ntsuas tam sim no feem ntau tshwm sim los ntawm kev ua haujlwm tsis raug. Puas yog tam sim no limiting resistor thiab voltage divider resistor tuaj yeem kuaj xyuas kev puas tsuaj? Yog tias hlawv tawm, nws yuav tsum tau hloov; Tom qab ntawd xyuas seb cov xaim txuas mus rau lub amplifier puas puas lawm? Yog tias muaj kev puas tsuaj, nws yuav tsum tau txuas dua tshiab; Yog tias nws tsis zoo, hloov lub amplifier.
(5) Puas yog cov zaub tsis ruaj khov thiab muaj lo lus hla qhov tshwm sim? Tshawb xyuas seb lub rooj tsavxwm tag nrho puas ntub los yog muaj cov dej xau? Yog tias muaj, lub rooj tsav xwm Circuit Court yuav tsum tau ntxuav thiab qhuav kom zoo; Puas muaj kev sib cuag * * lossis cov pob qij txha (nrog rau cov cwj mem xeem) hauv cov khoom siv hluav taws xob? Yog tias muaj, nws yuav tsum tau rov welded; Tshawb xyuas qhov kev tiv thaiv tsis zoo los yog qhov txawv txav ntawm tes ntawm cov khoom tom qab kev sim, uas yog tshwm sim los ntawm kev txo qis hauv lub zog. Yog tias qhov tshwm sim no tshwm sim, cov khoom yuav tsum tau hloov.
(6) Qhov tshwm sim ntawm qhov qhia tsis tseeb yog tshwm sim los ntawm qhov tsis ua hauj lwm los yog lub peev xwm hauv qhov ntsuas hluav taws xob, thiab lub capacitor lossis qhov tsis kam yuav tsum tau hloov. Txheeb xyuas tus nqi tsis kam ntawm qhov kev tiv thaiv hauv Circuit Court (suav nrog tus nqi tiv thaiv hauv cov tshuaj tiv thaiv thermal). Yog tias tus nqi hloov pauv lossis qhov hloov pauv thermal hloov pauv, qhov kev tiv thaiv yuav tsum tau hloov; Tshawb xyuas seb qhov kev tiv thaiv thiab kev muaj peev xwm hauv qhov siv hluav taws xob siv hluav taws xob ntawm A / D converter puas puas lawm? Yog tias puas lawm, hloov nws.
