Txoj kev daws teeb meem rau Hidden Faults ntawm Digital Multimeters
Muaj ntau ntau hom digital multimeters nrog ntau hom kev siv, tab sis tom qab tag nrho, multimeters yog hom khoom siv hluav taws xob, thiab tej zaum yuav muaj qee qhov teeb meem me me thaum siv. Nov yog ob peb lub tswv yim rau kev daws teeb meem.
1. Kev tsom xam Waveform.
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 40kHz. 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 50Hz square nthwv dej, txwv tsis pub nws yuav yog vim kev puas tsuaj rau sab hauv 200 zaus faib.
2. 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.
3. 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.
4. Kev tshuaj xyuas qhov tshwm sim.
Koj tuaj yeem kov qhov kub thiab txias 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 yuav tsum tau soj ntsuam seb lub Circuit Court puas, desoldered, mechanically puas, thiab lwm yam.
5. Tshawb xyuas qhov ua haujlwm voltage ntawm txhua qib.
Txhawm rau txheeb xyuas qhov ua haujlwm voltage ntawm txhua qhov chaw 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.
