Dab tsi yog qhov tseeb ntawm Digital Multimeter?
Lub multimeter digital tam sim no yog ib hom kev ntsuas digital, nrog lub peev xwm ntsuas muaj zog uas zoo heev tshaj analog multimeters. Nws kuj yog yooj yim nqa, yooj yim rau kev khiav lag luam, thiab muaj zog ua haujlwm; Nkag siab txog cov yam ntxwv tseem ceeb ntawm cov khoom lag luam yog qhov yuav tsum tau ua ua ntej siv lub tshuab multimeter zoo. Tom ntej no, tus editor yuav tham txog 9 lub luag haujlwm tseem ceeb ntawm multimeter - qhov tseeb;
Qhov tseeb ntawm digital multimeter
Qhov tseeb thiab qhov yuam kev ntawm multimeter yog sib cais, thiab cov multimeters digital inevitably tsim qhov yuam kev thaum ntsuas dua. Kev ntsuas qhov yuam kev ntawm ib qho cuab yeej yog ib qho ntawm nws cov kev ua haujlwm tseem ceeb, thiab qhov tseeb ntawm qhov ntsuas yog nws qhov kev ntsuas qhov yuam kev txwv, uas txhais tau hais tias nyob rau hauv cov xwm txheej, qhov ntsuas qhov yuam kev ntawm qhov ntsuas yuav tsis dhau qhov kev ua yuam kev. Yog li, kev ntsuas qhov yuam kev yog hais txog qhov sib txawv ntawm qhov ntsuas qhov ntsuas thiab qhov tseeb tus nqi, uas yog txheeb ze rau qee qhov kev ntsuas, thaum qhov tseeb ntawm qhov ntsuas ntsuas yog txheeb ze rau qee yam ntsuas.
Kev ntsuas qhov yuam kev ntawm ib qho cuab yeej muaj ob ntu, qhov yuam kev ruaj khov thiab qhov yuam kev ntxiv, uas yog qhov yuam kev uas tsis nyob ntawm qhov ntsuas qhov loj thiab qhov yuam kev uas nyob ntawm qhov ntsuas qhov loj. Qhov qub yog hu ua qhov yuam kev ruaj khov, qhov kawg yog hu ua qhov yuam kev ntxiv, thiab tag nrho qhov yuam kev yog qhov ua ke ntawm ob qhov yuam kev no.
Qhov tseeb ntawm digital multimeter yog kev sib xyaw ua ke ntawm cov txheej txheem thiab qhov tsis raug hauv qhov ntsuas ntsuas. Nws sawv cev rau qib ntawm qhov sib xws ntawm tus nqi ntsuas thiab tus nqi tseeb, thiab tseem qhia txog qhov loj ntawm qhov ntsuas qhov yuam kev. Feem ntau hais lus, qhov raug siab dua, qhov me me ntawm qhov ntsuas qhov yuam kev, thiab rov ua dua.
Cov kev ua yuam kev ntxiv ntawm cov multimeters muaj xws li qhov tsis raug hauv cov resistors ntxiv (voltage dividers), kev hloov pauv tsis raug los ntawm cov tswv yim rau DC voltage, thiab qhov yuam kev hauv qhov pib voltage ntawm A / D converters; Qhov yuam kev ruaj khov yog tshwm sim los ntawm ntau yam xws li quantization yuam kev, xoom drift, thiab suab nrov sab hauv ntawm A / D converter. Lub sij hawm qub yog feem ntau hu ua kev nyeem ntawv yuam kev, thaum lub sij hawm tom kawg raug xa mus rau qhov yuam kev tag nrho.
