Multimeter zaus muaj nuj nqi tsuas yog kho qhov uas nquag siv
Ua ntej, txoj kev kho kom pom qhov txhaum yuav tsum yog thawj zaug sab nraud tom qab sab hauv, thawj qhov yooj yim tom qab qhov nyuaj, tag nrho rau hauv xoom, tsom rau kev tawg. Txoj kev tuaj yeem muab faib ua ntau pawg hauv qab no:
Txoj kev xav
Los ntawm kev tsim txiaj ntawm kev nkag siab ncaj qha mus rau qhov ua rau tsis ua tiav ntawm kev txiav txim, los ntawm cov tsos ntawm kev soj ntsuam, tuaj yeem pom, xws li cov xov hlau tawg, de-welding, luv-circuit lap hlau, fuse tube tawg, cov khoom tawg, mechanical puas tsuaj, tooj liab ntawv ci ntawm cov luam tawm Circuit Court warping thiab tawg, thiab lwm yam .; koj tuaj yeem kov tawm ntawm lub roj teeb, resistors, transistors, kev sib xyaw ua ke ntawm qhov kub thiab txias, koj tuaj yeem xa mus rau daim duab kos duab kom paub seb yog vim li cas rau qhov kub thiab txias qhov txawv txav. Tsis tas li ntawd, tes kuj tseem tuaj yeem kuaj xyuas seb cov khoom puas yog xoob, kev sib xyaw ua ke hauv ko taw lub raj yog khov kho, qhov hloov pauv hloov tsis yog cassette; tuaj yeem hnov thiab hnov lub suab, tsw ntxhiab.
Ntsuas qhov voltage txoj kev
Kev ntsuas cov ntsiab lus tseem ceeb ntawm kev khiav hauj lwm voltage yog qhov qub, koj tuaj yeem pom qhov tsis ua haujlwm sai. Xws li ntsuas qhov A / D converter voltage, siv voltage.
Txoj kev luv luv Circuit Court
Nyob rau hauv txoj kev hais dhau los ntawm kev kuaj xyuas A / D converter feem ntau yog siv rau hauv txoj kev luv luv, txoj kev no hauv kev kho cov khoom siv hluav taws xob tsis muaj zog thiab microelectronic siv ntau dua.
Txoj kev txiav tawm
Tshem tawm qhov tsis txaus ntseeg ntawm tag nrho lub tshuab lossis chav tsev hauv Circuit Court, yog tias qhov txhaum ploj mus, nws txhais tau hais tias qhov txhaum yog nyob rau hauv qhov kev txiav tawm. Txoj kev no tsuas yog tsim nyog rau qhov muaj qhov luv luv hauv Circuit Court.
Kev ntsuas qhov ntsuas
Thaum qhov ua txhaum tau nqaim mus rau ib qho chaw lossis ob peb yam, lawv tuaj yeem ntsuas hauv online lossis offline. Yog tias tsim nyog, hloov nws nrog cov khoom zoo, yog tias qhov txhaum ploj mus, nws txhais tau hais tias cov khoom tsis zoo.6. Kev cuam tshuam txoj kev siv tib neeg induced voltage raws li ib qho kev cuam tshuam teeb liab, soj ntsuam cov kev hloov nyob rau hauv cov kua siv lead ua kua zaub, feem ntau siv los xyuas cov input Circuit Court thiab cov zaub ib feem.
Qhov thib ob, kho kev txawj ntse ntawm ib qho kev ua txhaum kev ntsuas yuav tsum xub xyuas thiab txheeb xyuas qhov tshwm sim txhaum cai yog qhov tshwm sim (tag nrho cov haujlwm tsis tuaj yeem ntsuas), lossis tus kheej (tus kheej lub luag haujlwm lossis tus kheej ntau), thiab tom qab ntawd sib txawv ntawm qhov xwm txheej, los daws qhov teeb meem. .
Yog tias tag nrho cov iav tsis tuaj yeem ua haujlwm, yuav tsum tsom mus rau kev kuaj xyuas lub zog hluav taws xob thiab A / D converter circuit. Txheeb xyuas qhov hluav taws xob, koj tuaj yeem tshem tawm cov roj teeb laminated, nias lub hwj huam hloov, nrog tus cwj mem zoo txuas nrog lub rooj ntsuas hluav taws xob tsis zoo, tus cwj mem tsis zoo txuas nrog lub hwj chim mov zoo (rau digital multimeter), qhov hloov mus rau qhov Secondary tube ntsuas cov ntaub ntawv, yog hais tias cov zaub yog lub thib ob tube zoo voltage, nws txhais tau hais tias lub hwj chim mov ib feem ntawm qhov zoo, yog hais tias tus deviation yog loj, ces nws txhais tau hais tias lub hwj chim mov ib feem ntawm qhov teeb meem. Yog tias muaj qhov qhib Circuit Court, tsom mus rau kev kuaj xyuas lub hwj chim hloov thiab cov roj teeb coj, thiab lwm yam.. Yog tias muaj kev cuam tshuam luv luv, nws yuav tsum tau siv txoj kev sib txuas kom maj mam txiav cov khoom siv hluav taws xob, tsom mus rau kev kuaj xyuas. ua haujlwm amplifiers, timers thiab A/D converters. Yog hais tias ib tug luv luv Circuit Court tshwm sim, nws feem ntau puas ntau tshaj ib tug integrated tivthaiv. Tshawb xyuas A / D converter tuaj yeem ua tiav tib lub sijhawm nrog lub ntsuas ntsuas, sib npaug rau DC lub taub hau ntawm analogue multimeter.
Kev tshuaj xyuas tshwj xeeb:
(1) qhov ntau ntawm cov lus ntsuas mus rau qhov qis tshaj DC voltage iav.
(2) Ntsuas seb qhov A / D converter kev khiav hauj lwm voltage yog li cas. Raws li tus qauv ntawm A / D converter siv nyob rau hauv lub rooj, sib xws rau V + tus pin thiab COM tus pin, qhov ntsuas tus nqi piv nrog nws cov nqi raug zoo ib yam.
(3) Ntsuas qhov siv hluav taws xob ntawm A / D converter, qhov siv hluav taws xob ntawm cov khoom siv digital feem ntau yog 100mV lossis 1V, piv txwv li, ntsuas DC voltage ntawm VREF + thiab COM, yog tias nws txawv ntawm 100mV lossis 1V, nws tuaj yeem yuav tau kho los ntawm sab nraud potentiometer.
(4) Txheeb xyuas tus naj npawb ntawm cov lus qhia qhov twg cov tswv yim yog xoom, luv luv qhov zoo davhlau ya nyob twg IN + thiab qhov tsis zoo davhlau ya nyob twg IN- ntawm A / D converter kom cov input voltage Vin=0 thiab cov cuab yeej qhia "{{4 }} 0 or "00 00.
(5) Txheeb xyuas cov zaub kom pom qhov ci ntsa iab. Luv luv lub xeem davhlau ya nyob twg TEST tus pin mus rau qhov zoo fais fab mov davhlau ya nyob twg V + kom lub logic hauv av ua siab muaj peev xwm thiab tag nrho cov digital circuits tsis ua hauj lwm. Vim hais tias ntawm DC voltage ntxiv rau txhua tus mob stroke, yog li tag nrho cov strokes yog ci ntsa iab para-meter zaub "1888, para-meter zaub" 18888. Yog tias tsis muaj kev cuam tshuam tsis zoo, tshawb xyuas A / D converter sib haum rau cov zis tus pin thiab cov roj hmab conductive (los yog kab), thiab cov zaub ntawm kev sib cuag tsis zoo thiab kev cuam tshuam ntawm qhov xwm txheej.
