Faults thiab txij nkawm ntawm cov iav tsis kam ntawm digital multimeter
①. Hais txog qhov tsis ua hauj lwm ntawm cov iav tiv thaiv ntawm cov digital multimeter saum toj no, ua ntej tshawb xyuas cov iav tiv thaiv kev ntsuas hluav taws xob, piv txwv li: seb tus nqi tsis kam ntawm shunt resistor rau cov iav tsis kam hloov, thiab lwm yam.
Yuav ua li cas siv digital multimeter los xyuas cov kab txhaum
1. Kev tshuaj xyuas qhov muag.
Koj tuaj yeem kov lub roj teeb, resistors, transistors, thiab cov blocks sib xyaw kom pom tias qhov kub thiab txias siab dhau lawm. Yog tias lub roj teeb uas tau teeb tsa tshiab ua kom sov, lub voj voog yuav luv luv. Nyob rau hauv tas li ntawd, lub Circuit Court yuav tsum tau soj ntsuam rau disconnection, desoldering, mechanical puas, thiab lwm yam.
2. Kev tsom xam Waveform.
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 ntawm lub voj voog.
Piv txwv li, yog tias lub moos oscillator oscillating, yog tias tsis muaj qhov tso tawm los ntawm oscillator, nws txhais tau hais tias lub inverter sab hauv puas, lossis cov khoom sab nraud yuav qhib.
3. Kev ntsuas qhov ntsuas qhov ntsuas.
Rau cov khoom nyob rau hauv qhov kev ua txhaum ntau, ua kev ntsuas hauv online lossis offline, thiab txheeb xyuas qhov ntsuas qhov tseem ceeb. Thaum ntsuas kev tiv thaiv hauv online, qhov cuam tshuam ntawm cov khoom sib txuas ua ke nrog nws yuav tsum tau txiav txim siab.
4. Kev daws teeb meem zais.
Nkaum faults hais txog qhov txhaum uas tshwm sim thiab ploj mus ib ntus, thiab ntsuas qhov zoo thiab qhov tsis zoo. Qhov kev ua tsis tiav no yog qhov nyuaj dua, thiab cov laj thawj feem ntau suav nrog cov vuam tsis muaj zog ntawm cov pob qij txha, qhov xoob, xoob ntawm cov khoom sib txuas, kev sib cuag tsis zoo ntawm cov hloov pauv hloov, kev ua haujlwm tsis ruaj khov ntawm cov khoom, thiab kev tawg ntawm cov hlau txuas txuas ntxiv. Tsis tas li ntawd, nws kuj suav nrog qee yam sab nraud. Piv txwv li, ambient kub siab dhau lawm, cov av noo siab dhau lawm, los yog muaj cov teeb liab cuam tshuam muaj zog nyob ze.
5. Tshawb xyuas qhov ua haujlwm voltage ntawm txhua qib.
Tshawb xyuas qhov ua haujlwm voltage ntawm txhua qhov taw tes thiab sib piv nrog tus nqi ib txwm muaj,
Ua ntej tshaj plaws, qhov tseeb ntawm qhov siv hluav taws xob yuav tsum tau lav. Nws yog qhov zoo tshaj plaws los siv digital multimeter ntawm tib tus qauv lossis zoo sib xws los ntsuas thiab sib piv.
Digital Multimeter Troubleshooting
Txawm hais tias qhov ntsuas hluav taws xob yog DC lossis AC voltage, yog tias nws yog AC voltage, lub lim capacitor hauv ac / dc hloov dua siab tshiab Circuit Court yuav tawg; Yog hais tias nws yog DC voltage, tej zaum yuav muaj teeb meem nyob rau hauv lub reference voltage Circuit Court. Nws raug nquahu kom koj yuav daim ntawv theej online yog tias koj muaj cov xwm txheej: Digital Multimeter Practical Measurement Techniques and Troubleshooting Book. Los saib.
Feem ntau, kev puas tsuaj ntawm digital multimeter yog tshwm sim los ntawm qhov ntsuas tsis raug. Piv txwv li, thaum ntsuas AC mains, qhov ntsuas qhov ntsuas tau raug xaiv los muab tso rau hauv qhov hluav taws xob thaiv. Nyob rau hauv cov ntaub ntawv no, thaum lub xeem cwj mem kov lub mains, nws yuav instantly puas lub internal Cheebtsam ntawm lub multimeter. kev puas tsuaj. Yog li ntawd, ua ntej siv lub multimeter los ntsuas, nco ntsoov xyuas seb qhov ntsuas iav puas yog. Thaum ntsuas qhov tam sim no, yog tias tus nqi tam sim no tshaj qhov ntau, feem ntau tsuas yog lub fuse hauv multimeter yuav raug tshuab, thiab tsis muaj lwm yam kev puas tsuaj yuav tshwm sim. Yog li ntawd, thaum ntsuas qhov ntsuas qhov ntsuas hluav taws xob, yog tias koj tsis paub qhov kwv yees ntawm qhov ntsuas qhov ntsuas hluav taws xob, koj yuav tsum xub teem lub ntsuas ntsuas mus rau qhov siab tshaj plaws iav, thiab tom qab ntawd hloov cov iav los ntsuas tom qab ntsuas nws tus nqi kom tau txais qhov tseeb ntau dua. Yog hais tias tus nqi hluav taws xob yuav tsum tau ntsuas nyob deb tshaj qhov siab tshaj plaws uas lub multimeter tuaj yeem ntsuas tau, nws yuav tsum tau nruab nrog lub ntsuas ntsuas siab. Xws li kuaj pom qhov thib ob anode high voltage thiab tsom high voltage ntawm dub thiab dawb xim TV.
