Kev qhia txog kev tu lub tshuab multimeter
1. Kho cov txheej txheem Koj yuav tsum pib tshawb nrhiav cov teeb meem ntawm sab nraud ua ntej txav mus rau sab hauv. Cov pawg hauv qab no tuaj yeem siv rau feem ntau pab pawg cov txheej txheem:
Txoj kev xav tau siv qhov kev nkag siab los ntsuas lub hauv paus ntawm qhov teeb meem ncaj qha. Kev kuaj pom pom tuaj yeem nthuav tawm cov teeb meem xws li kev sib txuas, desoldering, luv Circuit Court, burnt Cheebtsam, tawg fuse hlab, mechanical puas, tooj liab ntawv ci ntawm cov ntawv luam tawm Circuit Court, thiab tawg, thiab lwm yam; Koj tuaj yeem hnov cov roj teeb, resistors, transistors, thiab kev sib xyaw ua ke 'qhov kub thiab txias thiab saib daim duab kos los txiav txim seb qhov twg ua rau qhov kub tsis txawv txav. Tsis tas li ntawd, koj tuaj yeem pom qhov kev tshuaj xyuas qhov hloov pauv hloov pauv, cov pins sib xyaw ua ke, thiab cov khoom ntawm tes. Koj tseem tuaj yeem siv koj qhov kev hnov lus thiab hnov ntxhiab tsw los kuaj pom cov suab txawv txawv lossis cov ntxhiab tsw.
voltage gauge txheej txheem txiav txim seb qhov ua hauj lwm voltage ntawm txhua qhov chaw tseem ceeb yog ib txwm thiab muaj peev xwm nrhiav tau qhov txhaum taw tes sai. xws li kuaj xyuas A/D converter qhov ua haujlwm voltage thiab siv voltage.
ib txoj kev luv luv A/D converter soj ntsuam txoj kev sib tham saum toj no feem ntau siv txoj kev luv luv, uas nquag ua haujlwm hauv kev kho cov khoom siv hluav taws xob tsis zoo thiab microscopic.
qhib-circuit txheej txheem Tshem tawm cov neeg raug liam tiv thaiv los ntawm Circuit Court ntawm tag nrho lub tshuab lossis chav tsev. Yog hais tias qhov txhaum ploj mus, lub circuits uas tawg yog qhov chaw nws nyob. Feem ntau ntawm lub sijhawm, txoj hauv kev no ua haujlwm zoo thaum lub voj voog muaj luv luv.
Txoj hauv kev los nrhiav cov ntsiab lus Qhov teeb meem tuaj yeem ntsuas hauv online lossis offline tom qab nws tau nqaim mus rau ib qho chaw tshwj xeeb lossis ntau yam. Hloov nws, yog tias tsim nyog, nrog rau qhov tsim nyog. Yog hais tias qhov teeb meem ploj mus, cov khoom puas. 6. Siv kev cuam tshuam Siv cov teeb liab cuam tshuam uas tsim los ntawm tib neeg lub cev qhov hluav taws xob induced voltage los taug qab cov kev hloov pauv hauv cov kua siv lead ua kua, uas nquag ua kom ntseeg tau tias cov khoom siv hluav taws xob thiab cov khoom siv yog ob lub suab.
2. Kho kev txawj ntse Nyob rau hauv cov ntaub ntawv ntawm ib tug malfunctioning ntsuas, koj yuav tsum xub txiav txim seb qhov txhaum phenomena yog dav (tag nrho cov dej num yuav ntsuas tsis tau) los yog tshwj xeeb (tshwj xeeb lub luag hauj lwm los yog ib tug ntau yam), tom qab uas koj yuav tsum tau soj ntsuam thiab soj ntsuam nrog. teeb meem symptomatically.
Tsom ntsoov rau kev ntsuas lub zog hluav taws xob thiab A / D converter Circuit Court yog tias tsis muaj lub zog ua haujlwm. Tshem tawm lub roj teeb laminated, tig lub hwj chim, txuas qhov kev ntsuam xyuas zoo ua rau qhov tsis zoo ntawm lub zog hluav taws xob ntawm lub ntsuas hluav taws xob tau sim thiab qhov ntsuas tsis zoo ua rau lub zog zoo (rau digital multimeters), ces hloov mus rau diode ntsuas. txoj hauj lwm saib seb nws qhia tau hais tias lub hwj huam mov yog ua haujlwm zoo. Ib qho khoom siv hluav taws xob zoo qhia tau hais tias muaj zog dua rau pem hauv ntej ntawm lub diode. Ib qho kev hloov pauv siab qhia tau hais tias muaj teeb meem nrog cov khoom siv hluav taws xob.Cia siab rau kev tshuaj xyuas lub hwj chim hloov thiab roj teeb coj yog tias muaj qhov qhib hluav taws xob. Txhawm rau txheeb xyuas qhov ua haujlwm lub suab nrov, lub sijhawm ua haujlwm, thiab A / D converter yog tias muaj qhov luv luv, txuas ntxiv tshem tawm cov khoom uas nyob ntawm lub zog siv hluav taws xob siv txoj hauv kev qhib Circuit Court. Feem ntau, ntau tshaj ib qho kev sib xyaw ua ke raug mob hauv qhov luv luv. Lub analog multimeter lub taub hau ntsuas qhov yooj yim, uas yog piv rau DC lub taub hau 'meter', tuaj yeem siv tib lub sijhawm sim A / D converter.
Cov txheej txheem tshuaj xyuas tshwj xeeb: (1) Lub ntsuas ntsuas tau teeb tsa rau nws qhov chaw qis tshaj DC;
(2) Tshawb xyuas seb A / D converter qhov ua haujlwm voltage yog li cas. Txheeb xyuas seb tus nqi pom zoo li cas los ntawm kev muab piv rau nws tus nqi ib txwm siv A / D converter qauv uas sib haum rau V ntxiv tus pin thiab COM tus pin hauv lub rooj.
(3) Tshawb xyuas A/D converter qhov siv voltage. Ntsuas qhov DC voltage ntawm VREF ntxiv thiab COM siv ib tug raug digital multimeter nrog ib tug siv voltage ntawm 100 mV los yog 1 volt. Koj tuaj yeem siv cov potentiometer sab nraud yog tias nws deviates ntawm 100mV lossis 1V. Ua kev hloov kho.
(4) Txheeb xyuas tus nqi tso tawm thaum lub tswv yim yog xoom thiab lub ntsuas ntsuas nyeem "00.0 lossis "00.00. Ua li no, luv luv-circuit qhov zoo davhlau ya nyob twg IN ntxiv thiab qhov tsis zoo davhlau ya nyob twg IN- ntawm A/D converter los tsim cov input voltage Vin=0.
(5) Tshawb xyuas cov zaub tag nrho ntawm qhov ci. Tag nrho cov digital circuits ua tsis tau raws li qhov kev xeem lub davhlau ya nyob twg TEST tus pin thiab cov khoom siv hluav taws xob zoo V ntxiv txuas nrog hauv series. Tag nrho cov strokes yog ci thiab cov lus sib dhos qhia "1888" raws li qhov sib ntxiv ntawm DC voltage rau txhua tus mob stroke. Yog tias tsis muaj kev mob stroke, saib seb cov kua nplaum nplaum (lossis thaiv), qhov sib piv cov zis tus pin ntawm A / D converter, thiab cov zaub muaj kev sib cuag tsis zoo lossis raug txiav.
