Taw qhia rau Debital Motimeters tuaj yeem hloov cov multimeters
Undoubtedly, pultimimeter tau hais tias feem ntau siv siv hluav taws xob ntsuas cov khoom siv rau hluav taws xob, tab sis xaiv ib qho kev sib txuam nrog hluav taws xob lossis ib qho kev ntsuas (pointer) multidimeter yog ib lo lus nug. Qee tus neeg hais tias cov multimeters digital tau maj mam hloov cov multimeters, tab sis ntau cov kws tshaj lij yog tseem muaj kev txhawb nqa ntau dua los siv cov multimeters. Dab tsi yog qhov sib txawv ntawm cov digital mottimeter thiab analog multimeter? Qhov twg yog qhov zoo dua los siv?
Qhov loj tshaj qhov sib txawv ntawm cov digital motimeter thiab analog pullimeter yog cov zaub ntawm kev nyeem. Cov digital potiidat yog cov ua kua crystal zaub nrog cov kev daws teeb meem siab, uas tuaj yeem tshem tawm cov parallax thaum nyeem cov ntaub ntawv, ua kom nyeem cov ntaub ntawv yooj yim thiab muaj tseeb. Hauv qhov no, analog multimeters tsis tuaj yeem piv, tab sis lawv kuj muaj qhov zoo xav txog cov kev hloov pauv ntawm cov khoom ntsuas ntawm lub pointer.
Vim tias qhov tseeb tias cov kev ntsuas digital thiab tso cov hluav taws xob hauv kev sib quas ntus Piv txwv li, cov digital motulation tsis yooj yim thiab intuitive raws li qhov sib txawv ntawm cov cua nab, thiab kev soj ntsuam ntawm cov kev hloov pauv ntawm cov photoresistor tiv taus nrog lub teeb.
Nyob rau hauv cov nqe lus ntawm kev ua haujlwm hauv paus ntsiab lus, analog multimeters thiab cov neeg muaj kev ua kom digital kuj sib txawv. Tus qauv sab hauv ntawm cov multalis zog suav nrog lub taub hau meter, lub resistor, thiab roj teeb. Lub taub hau ntsuas feem ntau siv cov hluav taws xob Fais DC microoampeter microampere. When measuring resistance, the internal battery should be used, and the positive terminal of the battery should be connected to the black probe, so the current flows out from the black probe and into the red probe. Thaum ntsuas DC tam sim no, ib lub shunt resistor yog txuas nrog los ntawm kev hloov pauv hloov mus rau qhov tam sim no. Txij li thaum lub sijhawm tsis muaj kev tsis txaus ntseeg tam sim no ntawm lub ntsuas yog qhov me me, lub shunt resistor yog siv los nthuav cov ntau. When measuring DC voltage, a resistor is connected in series with the meter head, and different additional resistors are used to achieve conversion between different ranges.
Cov digital motimeter yog tsim ntawm kev hloov ua haujlwm, A / D Converter, thiab kev hloov pauv fais fab / d concl7106 ob hom kev sib koom ua ke A / D Converter. ICL7106 Adopts ob qho tseem ceeb, thawj zaug uas sib xyaw ua ke cov tswv yim analog teeb liab v1, lub npe hu ua tus txheej txheem piv txwv; Qhov thib ob sib koom ua ke ntawm cov siv voltage -} kev sib xyaw ua ke yog hu ua cov txheej txheem sib piv. Suav ob cov txheej txheem sib koom ua ke siv cov txee binary, hloov lawv mus rau cov digital ntau, thiab muab tso rau hauv daim foos digital. Txhawm rau ntsuas AC Voltage, tam sim no, kev tsis kam, capacitance, thiab lwm yam hluav taws xob hluav taws xob yuav tsum raug muab ntxiv kom hloov cov ntsuas hluav taws xob ntsuas rau hauv DC tshooj hluav taws xob.
