Dab tsi yog cov txheej txheem dav dav rau kev daws teeb meem digital multimeters?
Ib qho digital multimeter yog ib qho ntsuas ntsuas uas siv lub hauv paus ntsiab lus ntawm analog / digital hloov pauv los hloov cov ntsuas ntsuas mus rau qhov muaj nuj nqis digital thiab qhia cov txiaj ntsig ntsuas hauv daim ntawv digital. Piv nrog rau pointer multimeters, digital multimeters muaj qhov zoo ntawm high precision, ceev ceev, loj input impedance, digital zaub, nyeem kom raug, muaj zog tiv thaiv kev cuam tshuam, thiab qib siab ntawm kev ntsuas automation, thiab tau siv dav. Txawm li cas los xij, yog tias siv tsis raug, nws yuav ua rau muaj teeb meem.
Kev daws teeb meem digital multimeter feem ntau yuav tsum pib nrog lub hwj chim mov. Piv txwv li, yog tias lub LCD tsis muaj cov duab tom qab tig lub zog, koj yuav tsum xub xyuas seb qhov voltage ntawm 9V laminated roj teeb tsawg dhau thiab seb lub roj teeb txhuas puas raug txiav. Thaum nrhiav kev txhaum, koj yuav tsum ua raws li qhov kev txiav txim ntawm "thawj sab hauv ces sab nraud, thawj yooj yim ces nyuaj". Kev daws teeb meem digital multimeter feem ntau tuaj yeem ua raws li hauv qab no:
(1) Kev tshuaj xyuas qhov tshwm sim:
Koj tuaj yeem kov lub roj teeb, resistor, transistor, thiab kev thaiv nrog koj txhais tes kom pom tias qhov kub thiab txias dhau lawm. Yog tias lub roj teeb uas tau teeb tsa tshiab yog kub, nws txhais tau tias lub voj voog yuav luv luv. Tsis tas li ntawd, koj yuav tsum tau soj ntsuam seb lub Circuit Court puas yog disconnected, desoldered, mechanically puas, thiab lwm yam.
(2) Tshawb 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, koj yuav tsum xub xyuas qhov tseeb ntawm qhov siv hluav taws xob. Nws yog qhov zoo tshaj plaws los siv digital multimeter ntawm tib tus qauv lossis ib qho 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, sim seb lub moos oscillator pib oscillating thiab seb qhov oscillation zaus yog 40 kHz. Yog hais tias lub oscillator tsis muaj cov zis, nws txhais tau hais tias lub internal inverter ntawm TSC7106 puas, los yog sab nraud tivthaiv yuav qhib Circuit Court. Saib xyuas tias lub waveform ntawm tus pin {21} ntawm TSC7106 yuav tsum yog 50 Hz square wave. Txwv tsis pub, sab hauv 200 zaus faib yuav raug puas tsuaj.
(4) Kev ntsuas qhov ntsuas qhov ntsuas:
Rau cov khoom nyob rau hauv qhov kev ua txhaum ntau, ua qhov 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.
(5) Kev daws teeb meem zais:
Kev ua txhaum zais yog hais txog qhov txhaum uas tshwm sim thiab ploj mus, thiab qhov ntsuas tau zoo thiab qhov tsis zoo qee zaum. Hom kev ua tsis tiav no yog qhov nyuaj. Cov laj thawj feem ntau muaj xws li cov pob qij txha tsis muaj zog, cov pob qij txha xoob, cov khoom sib txuas tsis zoo, kev sib cuag tsis zoo ntawm kev hloov pauv, kev ua haujlwm tsis ruaj khov, thiab kev tawg txuas ntxiv ntawm cov hlau lead. 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 kev cuam tshuam muaj zog cuam tshuam cov teeb liab nyob ze, thiab lwm yam.
