Dab tsi yog cov txheej txheem dav dav rau kev daws teeb meem digital multimeter?
Teb: Ib qho digital multimeter yog lub ntsuas ntsuas uas siv lub hauv paus ntsiab lus ntawm analog-to-digital hloov dua siab tshiab los hloov cov ntsuas ntsuas mus rau qhov ntsuas digital thiab tso saib cov txiaj ntsig ntsuas hauv daim ntawv digital. Piv nrog rau pointer type multimeter, digital multimeter muaj qhov zoo ntawm qhov raug siab, ceev ceev, loj input impedance, yog digital zaub thiab nyeem ntawv, muaj zog tiv thaiv kev cuam tshuam, thiab qib siab ntawm kev ntsuas automation, thiab yog siv dav. Tab sis yog tias siv tsis raug, nws tuaj yeem ua rau tsis zoo.
Kev daws teeb meem digital multimeter feem ntau yuav tsum pib nrog lub hwj chim mov. Piv txwv li, tom qab tig lub zog, yog tias lub LCD tsis tso tawm, qhov voltage ntawm 9V stacked roj teeb yuav tsum tau kuaj ua ntej kom pom tias nws qis dhau lawm; Puas yog lub roj teeb coj tau txiav tawm. Nrhiav qhov txhaum yuav tsum ua raws li qhov kev txiav txim ntawm 'hauv thawj, 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:
Koj tuaj yeem kov qhov kub ntawm lub roj teeb, resistor, transistor, thiab kev thaiv nrog koj txhais tes los xyuas seb nws siab dhau lawm. 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 tseem yuav tsum tau saib xyuas seb lub Circuit Court puas raug kaw, desoldered, mechanically puas, thiab lwm yam.
(2) Tshawb xyuas qhov ua haujlwm voltage ntawm txhua qib:
Tshawb xyuas qhov ua haujlwm voltage ntawm txhua qib thiab sib piv nrog tus nqi ib txwm muaj. Ua ntej, xyuas kom meej qhov tseeb ntawm qhov kev siv hluav taws xob, zoo dua yog siv digital multimeter ntawm tib tus qauv lossis zoo sib xws rau kev ntsuas thiab sib piv.
(3) Waveform tsom xam:
Siv lub tshuab hluav taws xob oscilloscope los soj ntsuam qhov voltage waveform, amplitude, lub sij hawm (frequency), thiab lwm yam ntawm txhua qhov tseem ceeb hauv Circuit Court. Piv txwv li, xyuas seb lub moos oscillator yog nyob rau thiab yog tias qhov oscillation zaus yog 40 kHz. Yog hais tias lub oscillator tsis muaj cov zis, nws qhia tau hais tias lub internal inverter ntawm TSC7106 puas, los yog tej zaum yuav yog vim ib tug qhib Circuit Court nyob rau hauv sab nraud Cheebtsam. Lub waveform ntawm {21} tus pin ntawm TSC7106 yuav tsum yog 50 Hz square nthwv dej, txwv tsis pub nws yuav yog vim kev puas tsuaj rau sab hauv 200 zaus faib.
(4) Kev ntsuas qhov ntsuas:
Rau cov khoom nyob rau hauv qhov kev ua txhaum ntau, parameter qhov tseem ceeb yuav tsum tau txheeb xyuas rau kev ntsuas hauv online lossis offline. Thaum ntsuas kev tiv thaiv online, qhov cuam tshuam ntawm cov khoom sib txuas nrog nws yuav tsum tau txiav txim siab.
(5) Kev daws teeb meem zais:
Implicit faults hais txog qhov ua txhaum uas tshwm sim thiab ploj mus ib ntus, thiab qhov ntsuas qee zaum zoo lossis phem. Hom kev ua txhaum no yog qhov nyuaj heev, thiab cov laj thawj feem ntau suav nrog cov pob qij txha tau xoob, xoob txuas, kev sib cuag tsis zoo ntawm kev hloov pauv hloov, kev ua haujlwm tsis ruaj khov, thiab txuas txuas txuas ntxiv ntawm cov coj. Tsis tas li ntawd, nws kuj suav nrog cov xwm txheej tshwm sim los ntawm lwm yam. Yog hais tias qhov kub thiab txias ambient siab dhau lawm, cov av noo siab dhau lawm, los yog muaj cov teeb liab cuam tshuam muaj zog nyob ze, thiab lwm yam.
