Cov txheej txheem daws teeb meem rau Digital Multimeter Malfunctions
Kev daws teeb meem ntawm digital multimeters feem ntau pib nrog lub hwj chim mov. Piv txwv li, tom qab txuas cov khoom siv hluav taws xob, yog tias lub xov tooj ntawm LCD tshwm, thawj qhov yuav tsum tau xyuas yog seb qhov hluav taws xob ntawm 9V stacked roj teeb tsawg dhau lawm; Puas yog lub roj teeb coj tau txiav tawm. Kev tshawb nrhiav cov teeb meem yuav tsum ua raws li qhov kev txiav txim ntawm "sab hauv ua ntej, tom qab sab nraud, yooj yim ua ntej, ces nyuaj". Kev daws teeb meem ntawm digital multimeter tuaj yeem ua raws li hauv qab no.
1, Kev tshuaj xyuas qhov tshwm sim.
Yog qhov kub thiab txias ntawm lub roj teeb, resistor, transistor, thiab integrated block uas tuaj yeem kov ntawm tes siab dhau. Yog tias lub roj teeb uas tau nruab tshiab sov, nws qhia tau hais tias lub voj voog yuav luv luv. Tsis tas li ntawd, nws yog ib qho tsim nyog yuav tsum tau soj ntsuam seb lub Circuit Court puas tawg, desoldered, mechanically puas, thiab lwm yam.
2, Txheeb xyuas qhov voltage ntawm txhua theem ntawm kev ua haujlwm.
Xyuas qhov kev khiav hauj lwm voltage ntawm txhua qhov taw tes thiab muab piv nrog tus nqi ib txwm muaj. Ua ntej, xyuas kom meej qhov tseeb ntawm qhov siv hluav taws xob, zoo dua yog siv lub tshuab digital multimeter ntawm tib hom lossis cov neeg nyob sib ze rau kev ntsuas thiab sib piv.
3, Kev tsom xam Waveform.
Siv lub tshuab hluav taws xob oscilloscope los tshawb xyuas qhov voltage waveform, fluctuations, lub sij hawm (frequency), thiab lwm yam ntawm txhua qhov tseem ceeb hauv Circuit Court. Piv txwv li, yog tias lub moos vibrator pib vibrate thiab lub vibration zaus yog 40kHz. Yog tias lub vibrator tsis muaj qhov tso tawm, nws qhia tias TSC7106 sab hauv inverter puas lawm, lossis nws yuav yog qhov qhib Circuit Court nyob rau hauv cov khoom sab nraud. Lub waveform pom ntawm tus pin {21} ntawm TSC7106 yuav tsum yog 50Hz square nthwv dej, txwv tsis pub, nws yuav yog vim kev puas tsuaj rau sab hauv 200 zaus faib.
4, Ntsuas qhov ntsuas qhov ntsuas.
Rau cov khoom nyob rau hauv qhov teeb meem ntawm qhov teeb meem, kev ntsuas hauv online lossis offline yuav tsum tau muab coj los ntsuas, thiab qhov ntsuas qhov ntsuas yuav tsum tau txheeb xyuas. Thaum ntsuas kev tiv thaiv hauv online, qhov cuam tshuam ntawm cov khoom sib txuas sib txuas yuav tsum raug txiav txim siab.
5, Tshem tawm cov teeb meem zais.
Cov kab mob zais yog hais txog qhov xwm txheej uas qhov teeb meem tshwm sim thiab ploj mus, thiab cov tsos mob qee zaum zoo thiab qee zaum tsis zoo. Cov teeb meem no yog qhov nyuaj, nrog rau cov ntsiab lus xws li cov pob qij txha, kev xoob, xoob txuas, kev sib cuag tsis zoo ntawm cov hloov pauv hloov, cov khoom tsis ruaj khov, thiab kev ua haujlwm tsis tu ncua. Tsis tas li ntawd, nws kuj suav nrog qee yam sab nraud tsim. Xws li kub ambient kub, high humidity, los yog intermittent muaj zog cuam tshuam teeb liab nyob ib ncig ntawm.
