Taw qhia txog Kev Ua Haujlwm Ntxiv ntawm Multimeters
(1) Cov txheej txheem rau kev kuaj dej
Thaum ua qhov kev ntsuam xyuas xau, yuav tsum muaj multimeter. Cov txheej txheem tshwj xeeb yog raws li hauv qab no: tua tag nrho cov khoom siv hluav taws xob hauv lub tsheb, tshem tawm lub qhov hluav taws xob, thiab siv cov khoom siv tam sim no clamp ntawm lub tsheb multimeter. Yog tias qhov tam sim no ntws los ntawm lub ntsuas ntsuas nyob nruab nrab ntawm 10-30mA, nws qhia tau tias lub tsheb tsis muaj qhov to. Ntawm qhov tsis sib xws, yog tias cov zaub loj dhau lawm, nws raug txiav txim siab tias muaj qhov ua txhaum ntawm lub tsheb. Nws yuav tsum raug sau tseg tias qee lub tshuab nqus tau lub zog loj hauv 15 feeb tom qab kaw qhov hluav taws xob hloov hluav taws xob. Yog li, yog tias qhov ntsuas tam sim no siab dua 50mA, nws yuav tsum tau sim dua tom qab 15 feeb. Yog tias nws tseem siab dua 50mA nyob rau lub sijhawm no, nws qhia tau tias muaj qhov tshwm sim tshwm sim tiag tiag thiab xav tau kev kuaj mob ntxiv. Tom qab paub tseeb tias muaj cov xau hauv lub cev ntawm lub tsheb, khaws lub clamp tam sim no kom ruaj khov ntawm qhov tsis zoo ntawm lub roj teeb. Koj tuaj yeem tshem tawm cov fuses ib qho los ntawm ib qho thaum saib cov kev hloov pauv ntawm qhov ntsuas tam sim no. Yog tias tsis muaj kev hloov pauv ntawm tus lej tshwm sim ntawm lub ntsuas tom qab tshem tawm qee qhov fuse, nws qhia tau tias qhov xau tsis tshwm sim hauv lub voj voog ntawd. Yog tias tus nqi tso tawm ntawm lub digital clamp ammeter rov qab mus rau qhov qub 10-30mA (qee lub tsheb muaj qhov tseem ceeb hauv qab 50mA, nyob ntawm tus qauv), nws qhia tau tias qhov tshwm sim ntawm cov dej xau tau raug tshem tawm, uas txhais tau hais tias muaj qhov xau, hauv av lossis luv luv Circuit Court teeb meem hauv fuse tswj Circuit Court.
(2) Txheeb xyuas cov khoom siv hluav taws xob sai
Los ntawm kev siv cov kev ntsuas tam sim no, nws tseem tuaj yeem kuaj xyuas sai thiab tshawb xyuas cov laj thawj vim li cas ntau cov khoom siv hluav taws xob ntawm lub tsheb, xws li lub teeb taub hau, hais lus, roj twj tso kua mis relays, hluav taws xob qhov rooj thiab qhov rais motors, thiab cov tshuab hluav taws xob tsis ua haujlwm. Piv txwv li, rau kev kuaj xyuas cov twj siv hluav taws xob, yog tias qhov ua haujlwm tam sim no I =4.5A thiab cov twj siv roj ua haujlwm ib txwm ua, yog tias muaj cov roj txiav tawm - tawm qhov tshwm sim, nws yog tshwm sim los ntawm kev sib txuas hauv Circuit Court; Yog tias qhov ua haujlwm tam sim no kuv tsawg dua 4.5A, nws qhia tau hais tias muaj cov resistor lossis kev sib txuas hauv Circuit Court, lossis cov roj tank qias neeg dhau lawm, impurities raug thaiv rau hauv cov roj lim, thiab cov roj twj tso kua mis tsis tuaj yeem nqus cov roj, ua rau tsis muaj -load tam sim no; Yog tias qhov ua haujlwm tam sim no kuv siab dua 4.5A, nws qhia tau tias cov roj lim yuav raug txhaws lossis qee qhov txhaws, ua rau muaj kev nce ntxiv ntawm cov roj twj tso kua mis. Hauv qhov no, kev txiav txim siab tsis raug ntawm cov roj twj tso kua mis yog qhov yuav tshwm sim, thiab kev saib xyuas yuav tsum tau them thaum kuaj.
