Koj daim ntawv thov yuav txiav txim siab seb koj xaiv lub multimeter li cas.
Muaj ntau hom multimeters nyob rau hauv kev ua lag luam niaj hnub no, thiab kev xaiv tshwj xeeb ntawm multimeter nyob ntawm tus kheej siv. Txawm li cas los xij, tsis hais seb hom multimeter twg raug xaiv, nws yog qhov tseeb tsis raug xaiv los xaiv ib qho piv txwv qub hom multimeter. Lub multimeter zoo li MF47 yog qhov qis dua rau digital multimeter nyob rau hauv cov nqe lus ntawm kev ntsuas qhov tseeb thiab kev ua haujlwm, thiab qee qhov ntawm nws cov nplai iav tsis yog linear, uas ua rau qee qhov tsis yooj yim rau cov pib nyeem nrawm thiab qee zaum ua rau nws yooj yim rau kev nyeem ntsuas cov txiaj ntsig tsis raug. Yog li, tsab xov xwm no tsuas yog qhia txog kev xaiv ntawm digital multimeter.
Ib txwm 3/1/2 tus lej multimeter.
Yog hais tias tus neeg nug yuav ib lub multimeter nrog tsawg zaus siv thiab tsuas yog qee zaus siv nws hauv tsev los ntsuas AC220V voltage lossis roj teeb voltage, nrog rau qhov txuas ntxiv ntawm Circuit Court, ces siv 30-40 yuan los yuav ib txwm 3/1/ 2 tus lej multimeter txaus. Ordinary digital multimeters xws li DT830 thiab UT33D tuaj yeem ntsuas AC / DC voltage, tam sim no, thiab tsis kam, thiab tuaj nrog diode thiab buzzer nqis, uas txaus rau kev ntsuas dav dav thiab kev saib xyuas yooj yim hauv tsev.
Los ntawm txoj kev, thaum muas no hom multimeter, tsis txhob cia siab tias nws yuav pheej yig. Hloov chaw, yuav cov digital multimeters uas raug nqi tshaj kaum yuan. Cov pheej yig no muaj kev ntseeg tsis zoo thiab txuag ntawm cov khoom siv sab hauv. AC voltage ntau ntawm ib tug zoo DT830 multimeter siv TL062 ua hauj lwm amplifier txuas nrog ib tug precision rectifier Circuit Court, uas muaj peev xwm ntsuas qhov tsawg zaus AC voltages nyob rau hauv lub millivolt ntau yam. Txawm li cas los xij, cov multimeters ntawm tib tus qauv uas raug nqi ntau tshaj kaum yuan tshem tawm TL062 ua haujlwm amplifier thiab siv 1N4007 diode rectifier, yog li lawv cov AC voltage ntau tsuas tuaj yeem ntsuas AC voltages siab dua 1V, uas ua rau muaj teeb meem loj hauv kev ntsuas millivolt theem AC voltages.
Multifunctional digital multimeter.
Yog tias tus neeg nug tau koom nrog hauv kev kho hluav taws xob thiab xav tau los ntsuas ntau qhov ntsuas hluav taws xob, nws raug nquahu kom yuav cov khoom siv digital multimeter ua haujlwm. Hom multimeter no muaj nyob rau hauv cov nqi xws li 70-80 mus rau pua pua yuan. Feem ntau cov digital multimeters nyob rau hauv cov nqi no tuaj nrog capacitor, zaus, thiab transistor beta nqis, uas tuaj yeem ntsuas cov capacitors ntawm 2000 ~ 20000 μ F thiab zaus ntawm 2 ~ 20MHz. Qee qhov digital multimeters kuj tuaj yeem ntsuas qhov conductivity, lub voj voog ua haujlwm, kub, thiab inductance.
Ib qho digital multimeter tuaj yeem ntsuas qhov zaus mus txog 20MHz hauv qhov ntau zaus thiab 2000M Ω hauv qhov tsis kam. Nws qhov ntsuas kub yog -20 ~ 1000 degree, thiab nws tuaj yeem ntsuas inductance, nrog qhov ntsuas siab tshaj plaws ntawm 20H. Nws yog qhov yooj yim heev rau kev ntsuas ntau yam inductance coils.
Muaj tseeb RMS digital multimeter.
Ib qho digital multimeter tsis tu ncua tuaj yeem ntsuas qhov tsawg zaus sine yoj AC voltage ntawm 40-400Hz. Yog hais tias lub waveform ntawm qhov ntsuas AC voltage yog ib daim duab peb sab yoj, duab plaub, lossis lwm yam waveform, qhov kev nyeem ntawv yuam kev yuav yog qhov tseem ceeb. Yog tias tus neeg nug yuav tsum ntsuas qhov tsis yog sinusoidal AC voltage, nws raug nquahu kom yuav qhov tseeb RMS digital multimeter. Hom multimeter no feem ntau sau tias "True RMS" ntawm lub vaj huam sib luag thiab siv AD736 qhov tseeb RMS ntsuas IC sab hauv los ntsuas AC voltage. Nws tuaj yeem ntsuas qhov ntsuas AC voltage ntawm txhua qhov waveform thiab yog ywj pheej ntawm waveform distortion.
