Rau Qhov Tsis Txaus Siab ntawm Digital Multimeters
(1) Yog tias tsis muaj cov khoom tso rau ntawm qhov ntsuas, ua ntej xyuas seb lub roj teeb voltage yog li cas (feem ntau yog siv 9V roj teeb, thiab cov tshiab yuav tsum tau ntsuas). Qhov thib ob, xyuas seb lub fuse puas tau raug tshuab, seb qhov ntsuas hluav taws xob puas yog qhov qub, thiab seb qhov kev txwv tam sim no puas qhib. Tom qab ntawd, xyuas seb puas muaj corrosion, luv Circuit Court, los yog qhib Circuit Court board (tshwj xeeb tshaj yog nyob rau hauv lub main power circuit). Yog tias muaj, ntxuav lub rooj tsav xwm hauv Circuit Court thiab ua haujlwm zoo ntawm kev ziab thiab vuam raws sijhawm; Yog tias lub rooj tsav xwm hauv Circuit Court yog qhov qub, ob lub pins ntawm lub zog hluav taws xob ntawm cov khoom sib xyaw ua ke tuaj yeem ntsuas tau. Puas yog qhov ntsuas hluav taws xob zoo li qub? Yog tias qhov ntsuas hluav taws xob zoo li qub, qhov thaiv kev sib xyaw ua ke puas thiab yuav tsum tau hloov pauv; Yog tias qhov ntsuas hluav taws xob tsis zoo, xyuas seb puas muaj 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 tau ua haujlwm zoo tom qab tuav, ces qhov sib xyaw ua ke muaj qhov luv luv hauv thiab yuav tsum tau hloov.
(2) Cov iav tiv thaiv tsis tuaj yeem ntsuas. Ua ntej, tshuaj xyuas lub rooj tsav xwm Circuit Court pom kev. Puas muaj kev sib txuas lossis hlawv tawm cov resistor 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, ces qhov ntsuas module 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 lub vib nas this ntawm kev txwv qhov ntsuas, uas yog tshwm sim los ntawm cov teebmeem thermal vim lub zog tsis txaus, ces cov khoom siv (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. Koj puas tuaj yeem tshawb xyuas yog tias tam sim no limiting resistor thiab voltage divider resistor raug hlawv tawm? 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 cov lus dhia dhia? Tshawb xyuas seb lub rooj tsavxwm tag nrho puas ntub los yog muaj dej? Yog tias muaj, lub rooj tsav xwm Circuit Court yuav tsum tau ntxuav thiab qhuav kom zoo; Txheeb xyuas qhov kev sib cuag tsis zoo los yog cov khoom siv hluav taws xob hauv cov khoom siv hluav taws xob (nrog rau cov cwj mem xeem). Yog tias muaj, lawv yuav tsum tau rov ua dua; Xyuas seb puas muaj kev tiv thaiv tsis zoo lossis yog tias muaj cov khoom siv uas muaj qhov txawv txav ntawm tes tom qab kuaj. Qhov tshwm sim no tshwm sim los ntawm kev txo hwj chim. Yog tias qhov tshwm sim no tshwm sim, cov khoom yuav tsum tau hloov.
(6) Qhov tshwm sim ntawm kev nyeem ntawv tsis raug yog feem ntau tshwm sim los ntawm qhov tsis ua hauj lwm los yog lub peev xwm hauv qhov ntsuas hluav taws xob, thiab lub capacitor lossis resistor yuav tsum tau hloov. Txheeb xyuas tus nqi ntawm cov resistor hauv Circuit Court (xws li tus nqi kuj nyob rau hauv cov tshuaj tiv thaiv thermal). Yog tias tus nqi hloov pauv lossis qhov hloov pauv thermal hloov pauv, tus resistor 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.
