Yog cov multimeters muaj peev xwm hloov analog multimeters
Undoubtedly, ib tug multimeter tuaj yeem hais tau tias yog cov cuab yeej siv hluav taws xob uas siv ntau tshaj plaws rau cov neeg siv hluav taws xob, tab sis xaiv ib qho digital multimeter lossis analog (pointer) multimeter yog ib lo lus nug. Qee tus neeg hais tias digital multimeters tau maj mam hloov analog multimeters, tab sis ntau tus kws tshaj lij hluav taws xob tseem tau siv ntau dua los siv analog multimeters. Dab tsi yog qhov sib txawv ntawm digital multimeter thiab analog multimeter? Qhov twg yog qhov zoo dua los siv?
Qhov sib txawv loj tshaj plaws ntawm digital multimeter thiab analog multimeter yog cov zaub ntawm kev nyeem ntawv. Lub multimeter digital yog cov kua siv lead ua kua nrog cov kev daws teeb meem siab, uas tuaj yeem tshem tawm cov parallax thaum nyeem cov ntaub ntawv, ua rau kev nyeem ntawv yooj yim thiab raug. Hauv qhov no, analog multimeters tsis tuaj yeem sib piv, tab sis lawv kuj muaj lawv tus kheej qhov zoo, uas yog lawv muaj peev xwm intuitively xav txog cov kev hloov pauv ntawm cov khoom ntsuas los ntawm qhov deflection instantaneous ntawm tus pointer.
Vim lub fact tias cov multimeters digital ntsuas thiab tso saib hluav taws xob nyob rau hauv ib tug intermittent yam, nws tsis yooj yim los soj ntsuam cov kev hloov tas mus li thiab cov tiam sis ntawm cov ntsuas hluav taws xob. Piv txwv li, digital multimeter tsis yooj yim thiab intuitive li analog multimeter los kuaj cov txheej txheem them nyiaj ntawm cov khoom siv hluav taws xob, qhov hloov pauv ntawm thermistor tsis kam nrog qhov kub thiab txias, thiab kev soj ntsuam cov yam ntxwv ntawm kev hloov pauv ntawm photoresistor tsis kam nrog lub teeb.
Raws li txoj cai ntawm kev ua haujlwm, analog multimeters thiab digital multimeters kuj txawv. Internal qauv ntawm analog multimeters muaj xws li ib tug meter taub hau, ib tug resistor, thiab ib lub roj teeb. Lub taub hau ntsuas feem ntau siv lub tshuab hluav taws xob magneto DC microampere meter. Thaum ntsuas kev tiv thaiv, lub roj teeb sab hauv yuav tsum tau siv, thiab lub davhlau ya nyob twg zoo ntawm lub roj teeb yuav tsum tau txuas nrog lub ntsuas hluav taws xob dub, yog li tam sim no ntws tawm ntawm qhov kev sojntsuam dub thiab mus rau qhov kev sojntsuam liab. Thaum ntsuas DC tam sim no, lub shunt resistor txuas los ntawm kev hloov lub zog kom hloov pauv tam sim no. Txij li thaum tag nrho cov kev tsis ncaj ncees tam sim no ntawm lub 'meter' me me, lub shunt resistor yog siv los nthuav qhov ntau. Thaum ntsuas DC voltage, tus resistor txuas nrog hauv cov koob nrog lub ntsuas lub taub hau, thiab cov khoom sib txawv ntxiv tau siv los ua kom tau txais kev hloov pauv ntawm ntau qhov sib txawv.
