Kuv yuav ua li cas daws qhov teeb meem digital multimeter? Cov kev daws teeb meem zoo li cas?
Digital multimeter yog lub ntsuas ntsuas uas siv lub hauv paus ntsiab lus ntawm analog-rau-digital hloov dua siab tshiab los hloov cov ntaub ntawv ntsuas mus rau hauv cov lej digital thiab tso saib cov txiaj ntsig ntsuas hauv daim ntawv digital. Piv nrog rau pointer multimeters, digital multimeters tau dav siv vim lawv qhov raug siab, ceev ceev, loj input impedance, digital zaub, nyeem kom raug, muaj zog tiv thaiv kev cuam tshuam, thiab qib siab ntawm kev ntsuas automation. Tab sis yog tias siv tsis raug, nws tuaj yeem ua rau tsis zoo.
Kev daws teeb meem digital multimeter feem ntau pib nrog lub hwj chim mov. Piv txwv li, tom qab sib txuas cov khoom siv hluav taws xob, yog tias lub LCD tsis tso tawm, qhov voltage ntawm 9V stacked roj teeb yuav tsum tau kuaj ua ntej kom pom tias nws tsawg dhau; Puas yog lub roj teeb coj tau txiav tawm. Kev tshawb nrhiav qhov txhaum yuav tsum ua raws li qhov kev txiav txim ntawm "hauv ntej, tom qab sab nraud, yooj yim ua ntej, tom qab 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 sib xyaw 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 Circuit Court 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 ua haujlwm voltage ntawm txhua qib:
Txhawm rau txheeb xyuas qhov ua haujlwm voltage ntawm txhua qib thiab sib piv nrog tus nqi ib txwm muaj, qhov tseeb ntawm qhov siv hluav taws xob yuav tsum tau ua kom ntseeg tau ua ntej. Nws yog qhov zoo tshaj plaws los siv lub tshuab digital multimeter ntawm tib lossis zoo sib xws rau kev ntsuas thiab kev sib piv.
(3) Waveform tsom xam:
Saib xyuas qhov voltage waveform, amplitude, lub sij hawm (frequency), thiab lwm yam ntawm txhua qhov tseem ceeb hauv Circuit Court siv lub tshuab hluav taws xob oscilloscope. Piv txwv li, txhawm rau kuaj seb lub moos oscillator pib oscillating thiab seb qhov oscillation zaus yog 40 kHz. Yog tias lub oscillator tsis muaj qhov tso tawm, nws qhia tau tias TSC7106 sab hauv inverter puas lawm, lossis nws yuav yog qhov qhib Circuit Court hauv cov khoom sab nraud. Lub waveform pom ntawm tus pin {21} 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 qhov ntsuas:
Rau cov khoom nyob rau hauv qhov txhaum ntau, kev ntsuas hauv online lossis offline yuav tsum tau ua, 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 hauv qhov sib npaug yuav tsum raug txiav txim siab.
(5) Kev daws teeb meem zais:
Nkaum faults hais txog qhov txhaum uas tshwm sim thiab ploj mus tsis tu ncua, nrog lub ntsuas vaj huam sib luag hloov pauv ntawm qhov zoo thiab qhov tsis zoo. Hom kev ua txhaum no yog qhov nyuaj heev, thiab feem ntau ua rau muaj xws li virtual soldering ntawm cov pob qij txha, loosening, xoob connectors, kev sib cuag tsis zoo ntawm kev hloov pauv hloov, kev ua haujlwm tsis ruaj khov, thiab kev ua haujlwm tsis tu ncua. Tsis tas li ntawd, nws kuj suav nrog cov xwm txheej tshwm sim los ntawm lwm yam. Xws li ambient kub, high humidity, los yog intermittent muaj zog cuam tshuam teeb liab nyob ze.
