Yuav ua li cas yuav Multimeter nyob ntawm seb koj xav siv nws li cas.
Muaj ntau ntau hom multimeters nyob rau hauv kev ua lag luam niaj hnub no, thiab cov hom multimeter xaiv nyob ntawm koj tus kheej siv. Txawm li cas los xij, tsis hais hom multimeter twg, lub qub pointer multimeter yuav tsum tsis txhob yuav. Zoo li MF47 hom multimeter no tsis hais qhov kev ntsuas qhov tseeb lossis kev ua haujlwm tsawg dua li digital multimeter, thiab qee qhov ntawm nws cov iav nplai tsis yog linear, uas coj qee qhov tsis yooj yim rau cov pib nyeem nrawm, thiab qee zaum nws kuj yooj yim nyeem. cov txiaj ntsig ntawm kev ntsuas tsis raug, nws tsuas yog ntawm no los qhia txog kev yuav khoom ntawm digital multimeter.
Ib qho yooj yim 3∕½ tus lej digital multimeter.
Yog hais tias tus neeg nug yuav ib tug multimeter siv zaus tsis siab, muab tso rau hauv lub tsev tsuas yog qee zaus siv los ntsuas AC220V voltage lossis roj teeb voltage thiab kab rau thiab tawm, ces siv peb caug lossis plaub caug yuan los yuav ib qho 3∕½ digital multimeter. tuaj yeem yog. Zoo li DT830, UT33D zoo tib yam digital multimeter tuaj yeem ntsuas AC thiab DC voltage, tam sim no thiab tsis kam, thiab nrog diode thiab buzzer iav, txaus kom ua tau raws li kev ntsuas dav dav thiab kev saib xyuas yooj yim hauv tsev.
Los ntawm txoj kev, thaum yuav hom multimeter no, tsis txhob sim pheej yig, yuav cov ntau tshaj kaum duas las ntawm digital multimeter, qhov kev ntseeg siab ntawm qhov pheej yig no kuj tsis zoo, sab hauv tuaj yeem txuag cov khoom tau txais kev cawmdim. Zoo li ib tug zoo DT830 multimeter AC voltage cov ntaub ntawv yog txuas nrog ib tug precision rectifier Circuit Court siv TL062 op-amp, muaj peev xwm ntsuas qhov millivolt theem ntawm tsawg zaus AC voltage, thaum tib hom multimeter nrog ntau tshaj kaum las nyob rau hauv lub omission ntawm TL062 op-amp, kev siv 1N4007 diode rectifier, cov ntaub ntawv AC voltage tsuas yog ntsuas ntau tshaj 1V AC voltage, ntsuas hauv millivolts, AC voltage yuam kev loj heev.
Multi-function digital multimeter.
Yog tias tus neeg nug tau koom nrog hauv kev kho hluav taws xob, qhov xav tau los ntsuas ntau yam kev ntsuas hluav taws xob, nws raug nquahu kom yuav cov khoom siv digital multimeter puv puv. Cov multimeters no muaj nyob rau ntawm tus nqi xws li xya caum txog yim caum mus rau pua pua daus las. Feem ntau ntawm cov digital multimeter ntawm tus nqi no nrog cov ntaub ntawv capacitance, cov ntaub ntawv zaus thiab cov ntaub ntawv transistor, lawv tuaj yeem ntsuas qhov capacitance ntawm 2000 ~ 20000μF, 2 ~ 20MHz zaus. Qee qhov digital multimeter kuj tseem tuaj yeem ntsuas qhov conductivity, lub voj voog ua haujlwm, kub thiab inductance.
Zoo li GD128 digital multimeter, cov ntaub ntawv zaus tuaj yeem ntsuas txog 20MHz zaus, cov ntaub ntawv tiv thaiv tuaj yeem ntsuas txog 2000MΩ tsis kam, ntsuas qhov ntsuas kub ntawm -20 ~ 1000 degree, thiab tseem tuaj yeem ntsuas inductance, nws qhov siab tshaj plaws tuaj yeem ntsuas 20H inductance , siv los ntsuas ntau yam ntawm inductive coils yog yooj yim heev.
Muaj tseeb RMS digital multimeter.
Ordinary digital multimeter tsuas tuaj yeem ntsuas 40 ~ 400Hz qis zaus sinusoidal AC voltage, yog tias ntsuas AC voltage waveform yog daim duab peb sab yoj, duab plaub lossis lwm yam waveforms, lub sijhawm no ntsuas kev nyeem ntawv yuam kev loj heev. Yog tias tus neeg nug yuav tsum ntsuas qhov tsis yog-sinusoidal AC voltage, nws raug nquahu kom yuav qhov tseeb RMS digital multimeter, qhov multimeter no feem ntau yog cim rau ntawm lub vaj huam sib luag "True RMS", kev siv sab hauv ntawm AD736 xws li RMS ntsuas IC los ntsuas qhov tseeb AC voltage, koj tuaj yeem ntsuas qhov AC voltage ntawm txhua qhov waveform, thiab nrog lub waveform Nws tuaj yeem ntsuas qhov AC voltage ntawm arbitrary waveforms thiab tsis muaj dab tsi cuam tshuam nrog kev cuam tshuam ntawm waveforms.
