Taw qhia rau multimeters: cov haujlwm tshwj xeeb thiab cov ntawv thov
Tus multimeter tau dhau los ua cov cuab yeej tseem ceeb rau hauv hluav taws xob thiab hluav taws xob engineers vim nws cov versatility, yooj yim, thiab yooj yim ntawm kev siv. Txawm li cas los xij, yog tias koj xav tau siv tag nrho nws cov haujlwm, koj tuaj yeem sai thiab raug cov ntaub ntawv raug. Tom qab ntawd peb yuav tsum muaj kev nkag siab tob txog qee yam cwj pwm ntawm cov multimeters:
Yog cov digital motatalisted zoo dua li qhov analog motimeter?
Solution: Digital multimeters have been rapidly applied due to their high precision and sensitivity, fast measurement speed, multiple functions, small size, high input impedance, easy observation, and powerful communication capabilities. Muaj ib txoj kev hloov mus rau cov ntsiab lus analog.
Tab sis nyob rau hauv qee kis, xws li cov neeg uas muaj zog electromagnetic cuam tshuam vim tias cov ntaub ntawv cuam tshuam ntawm cov digital motimeter yog high thiab yooj yim cuam tshuam los ntawm cov peev xwm.
Thaum lub sijhawm saib xyuas, nws yog tias raug mob los ntawm kev daws teeb meem uas cov Diode lossis lub tshuab hluav taws xob hauv Circuit Court yuav raug puas ntsoog. Tab sis siv lub ntsuas phoo digital meter diode los ntsuas nws cov conduction conduction yog li 0.6v, uas yog infinite nyob rau hauv rov qab. Tsis muaj teeb meem, txawm tias tom qab kuaj xyuas qhov Circuit Court dua, tsis pom qhov txhaum cai. Vim li cas?
Kev daws: feem ntau digital meters emit ib qho kev sim ntsuas ntawm txog 3-4.5V los ntawm Diode hom. Yog tias qhov kev sim siab trantor tau muaj kev xau me me lossis cov xeeb ceem uas nkhaus muaj qhov tsis zoo, nws tsis tuaj yeem tshwm rau ntawm cov hluav taws xob tsawg. Txij ntawm no, koj yuav tsum tau siv analog meter nrog 10k tiv taus ntau. Qhov kev sim voltage tsim los ntawm qhov no yog 10V lossis 15V, thiab ntawm qhov kev ntsuas no, nws yuav pom tias tus neeg xav tias tus neeg xav tias tus neeg xav tsis thoob thaum rov qab. Ib yam li ntawd, thaum ntsuas qhov tsis kam ntawm qee yam precision rhiab cov khoom siv nrog tsawg heev withalgage voltage, siv ib qho analog ntsuas tau yooj yim kev puas tsuaj rau cov khoom siv rhiab. Txij ntawm no, lub ntsuas ntsuas digital yuav tsum tau siv rau kev ntsuas.
3. Siv ib qho kev ntsuas ntau los ntsuas qhov ntsuas tus nqi tom qab kev sim DCV yog qhov tseeb dua, tab sis ACV yuam kev yog qhov tseem ceeb. Txawm hais tias muaj qhov tseeb heev rau motimeter heev, qhov no tseem yog qhov teeb meem. Dab tsi yog vim li cas rau qhov no?
Kev daws: Feem ntau ntawm cov neeg muaj txiaj ntsig siv kev sib txuas sib txuas rau kev ntsuas voltage, thiab rau tag nrho cov voltuit Court, voltermeter nws tus kheej yog sib npaug rau lub nra uas yog cov lus qhia impedance. Qhov loj dua lub impedance ntawm lub nra no, qhov me dua qhov cuam tshuam ntawm kev sim cov kev sim, thiab qhov ntau qhov kev xeem yuav yog. Tab sis tsis muaj dab tsi yuav ua tau zoo tag nrho, siab yuam kev txhais tau tias kev txi ntawm bandwidth ntawm kev sim. Tam sim no, cov lus qhia impedance ntawm multimeters nrog cov lus teb ntau ntawm ib puag ncig ntawm 1,1m, yog li nws yuav muaj qhov siab tsis kam ntawm qhov siab- voltage sojntsuam nws tus kheej. Txij ntawm no, koj yuav tsum xaiv lub siab sab hauv kev ua kom loj dua, xws li tus qauv 17078688 ω Thaum kuaj ACV motims, txhawm rau zam qhov teeb meem no.
