Yuav Ua Li Cas Kho Digital Multimeter thiab Cov Lus Qhia rau Pib
Kho txoj kev
Thaum nrhiav kev txhaum, koj yuav tsum xub saib rau sab nraud thiab tom qab ntawd sab hauv, ua ntej qhov yooj yim thiab tom qab ntawd qhov nyuaj, tawg mus rau hauv qhov chaw, thiab tsom mus rau kev tawg. Cov txheej txheem tuaj yeem kwv yees faib ua pawg hauv qab no:
1. Cov txheej txheem kev hnov tsw tso siab rau qhov kev xav ncaj qha rau qhov ua txhaum. Los ntawm kev tshuaj xyuas qhov muag, nws tuaj yeem pom xws li cov xov hlau tawg, desoldering, luv luv Circuit Court, tawg fuse hlab, cov khoom tawg, cov khoom puas tsuaj, thiab cov ntawv ci tooj liab ntawm cov ntawv luam tawm. sawv thiab tawg, thiab lwm yam.; Koj tuaj yeem kov qhov kub thiab txias ntawm cov roj teeb, resistors, transistors, thiab kev sib xyaw ua ke, thiab xa mus rau daim duab kos duab kom paub seb qhov ua rau qhov kub tsis txawv txav. Tsis tas li ntawd, koj tseem tuaj yeem siv koj txhais tes los xyuas seb cov khoom puas yog xoob, seb cov pins sib xyaw ua ke tau ruaj khov, thiab seb qhov hloov pauv puas tau daig; koj tuaj yeem hnov thiab hnov txog seb puas muaj cov suab txawv txawv thiab tsw tsw.
2. Kev ntsuas qhov ntsuas hluav taws xob: Kev ntsuas seb qhov ua haujlwm voltage ntawm txhua qhov tseem ceeb yog qhov qub tuaj yeem pom qhov yuam kev sai sai. Xws li ntsuas qhov ua haujlwm voltage thiab siv voltage ntawm A / D converter.
3. Txoj kev luv-circuit: Txoj kev luv-circuit feem ntau yog siv rau hauv cov txheej txheem ntawm kev kuaj A/D converters uas tau hais los saum no. Txoj kev no feem ntau siv thaum kho cov cuab yeej hluav taws xob tsis muaj zog thiab micro-hluav taws xob.
4. Txoj kev rhuav tshem Circuit Court: Tshem tawm qhov tsis txaus ntseeg ntawm tag nrho lub tshuab lossis chav tsev hauv Circuit Court. Yog hais tias qhov txhaum ploj mus, nws txhais tau hais tias qhov txhaum nyob rau hauv lub disconnected Circuit Court. Txoj kev no yog qhov tsim nyog rau cov xwm txheej uas muaj luv luv hauv Circuit Court.
5. Cov txheej txheem ntsuas cov khoom: Thaum qhov ua txhaum tau raug txo qis rau qee yam khoom lossis ob peb yam, nws 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 qhov induced voltage ntawm tib neeg lub cev raws li lub teeb liab cuam tshuam los soj ntsuam cov kev hloov hauv cov kua siv lead ua kua. Nws feem ntau yog siv los xyuas seb qhov input Circuit Court thiab cov khoom siv puas zoo lawm.
Kho cov lus qhia
Rau cov cuab yeej faulty, koj yuav tsum xub xyuas thiab txiav txim siab seb qhov tshwm sim txhaum puas muaj tshwm sim (tag nrho cov haujlwm tsis tuaj yeem ntsuas tau) lossis tus kheej (tus kheej lub luag haujlwm lossis tus kheej ntau yam), thiab tom qab ntawd txheeb xyuas qhov xwm txheej thiab daws nws raws li.
1. Yog tias txhua lub zog tsis ua haujlwm, tsom mus xyuas lub zog hluav taws xob thiab A / D converter circuit. Thaum kuaj xyuas cov khoom siv hluav taws xob, koj tuaj yeem tshem tawm cov roj teeb laminated, nias lub hwj huam hloov, txuas qhov kev ntsuam xyuas zoo ua rau lub zog tsis zoo ntawm lub ntsuas hluav taws xob nyob rau hauv kev sim, thiab txuas cov kev xeem tsis zoo ua rau lub zog zoo (rau cov khoom siv digital. multimeter). Tig qhov hloov mus rau qhov ntsuas diode. Yog tias nws pom tias yog qhov hluav taws xob tom ntej ntawm lub diode, nws txhais tau hais tias cov khoom siv hluav taws xob zoo. Yog tias qhov sib txawv loj, nws txhais tau hais tias muaj teeb meem nrog cov khoom siv hluav taws xob. Yog tias muaj qhov qhib Circuit Court, tsom mus rau kev kuaj xyuas lub hwj chim hloov thiab cov roj teeb coj. Yog hais tias ib tug luv luv Circuit Court tshwm sim, koj yuav tsum tau siv lub Circuit Court breaking txoj kev maj mam disconnect lub Cheebtsam uas siv lub hwj chim, tsom mus rau kev soj ntsuam lub lag luam amplifier, timer, A / D converter, thiab lwm yam. Yog hais tias ib tug luv luv Circuit Court tshwm sim, feem ntau muaj ntau tshaj ib tug integrated tivthaiv. yuav puas. Lub A / D converter tuaj yeem tshawb xyuas tib lub sijhawm raws li qhov ntsuas yooj yim, uas yog sib npaug rau DC meter ntawm analog multimeter. Txoj kev tshuaj xyuas tshwj xeeb yog:
(1) Kev ntsuas qhov ntsuas ntawm qhov ntsuas ntsuas tau tig mus rau qhov qis tshaj DC voltage ntau;
(2) Ntsuas seb qhov ua haujlwm voltage ntawm A / D converter yog qhov qub. Raws li A / D converter qauv siv nyob rau hauv lub rooj, sib xws rau V + tus pin thiab COM tus pin, seb tus nqi ntsuas yog raws li nws cov nqi raug.
(3) Ntsuas qhov siv voltage ntawm A / D converter. Kev siv hluav taws xob ntawm cov khoom siv digital multimeter feem ntau yog 100mV lossis 1V, uas yog, ntsuas qhov DC voltage ntawm VREF + thiab COM. Yog hais tias nws deviates ntawm 100mV los yog 1V, siv lub potentiometer sab nraud. Ua kev hloov kho.
(4) Txheeb xyuas tus lej xov tooj uas nws cov tswv yim yog xoom, luv-circuit 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, lub meter qhia "{{ 5}} 0" or "00.00".
(5) Tshawb xyuas lub monitor kom pom qhov ci ntsa iab tag nrho. Short-circuit lub xeem davhlau ya nyob twg TEST tus pin thiab qhov zoo fais fab mov davhlau ya nyob twg V +, kom lub logic hauv av yuav muaj peev xwm thiab tag nrho cov digital circuits tsis ua hauj lwm. Txij li thaum DC voltage yog siv rau txhua qhov mob stroke, txhua qhov strokes teeb thiab lub ntsuas ntsuas ntsuas "1888", thiab cov ntsuas ntsuas ntsuas "18888". Yog tias muaj cov kab mob uas ploj lawm, xyuas seb puas muaj kev sib cuag lossis kev cuam tshuam ntawm tus pin cov zis sib txuas ntawm A / D converter, cov nplaum nplaum (lossis kev sib txuas), thiab cov zaub.
