Dab tsi yog qhov tseeb ntawm multimeter
Qhov tseeb ntawm digital multimeter yog kev sib xyaw ua ke ntawm cov txheej txheem thiab qhov tsis raug hauv kev 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 kev ntsuas qhov yuam kev. Feem ntau hais lus, qhov siab dua qhov tseeb, qhov me me ntawm qhov ntsuas qhov yuam kev, thiab rov ua dua.
Muaj peb txoj hauv kev los qhia qhov tseeb, raws li hauv qab no:
Qhov tseeb=± (ib feem RDG ntxiv rau b feem pua FS) (2.2.1)
Qhov tseeb=± (ib feem RDG ntxiv rau n cov lus) (2.2.2)
Qhov tseeb=± (ib feem pua RDG ntxiv rau b feem pua FS ntxiv rau n cov lus) (2.2.3)
Nyob rau hauv kab zauv (2.2.1), RDG sawv cev rau tus nqi nyeem ntawv (xws li zaub tus nqi), FS sawv cev rau tag nrho cov nqi, cov khoom yav dhau los nyob rau hauv lub voj voog sawv cev rau qhov kev ua yuam kev ntawm A / D converter thiab functional converter (xws li voltage divider, splitter, tseeb RMS converter), thiab cov khoom tom kawg yog qhov yuam kev los ntawm kev ua cov digital. Hauv kab zauv (2.2.2), n yog qhov kev hloov pauv hauv quantization yuam kev tshwm sim hauv tus lej kawg. Yog hais tias qhov yuam kev ntawm n cov lus tau hloov mus rau ib feem pua ntawm tag nrho cov nplai, nws dhau los ua qhov sib npaug (2.2.1). Kev sib npaug (2.2.3) yog qhov tshwj xeeb, thiab qee cov tuam txhab siv cov lus qhia no. Ib qho ntawm ob lub xeem sawv cev rau kev ua yuam kev qhia los ntawm lwm qhov chaw lossis kev ua haujlwm.
Qhov tseeb ntawm cov multimeter yog qhov zoo dua li qhov analog pointer multimeter. Ua qhov ntsuas qhov tseeb ntawm qhov yooj yim ntawm kev ntsuas DC voltage ua piv txwv, nws tuaj yeem ncav cuag ± {{0}}.5 feem pua rau 3 thiab ib nrab khoom, thiab 0.03 feem pua rau 4 thiab ib nrab khoom. Piv txwv li, OI857 thiab OI859CF multimeters. Qhov tseeb ntawm multimeter yog qhov taw qhia tseem ceeb heev, uas qhia txog qhov ua tau zoo thiab kev muaj peev xwm ntawm multimeter. Ib tug multimeter nrog cov neeg tsis zoo yog qhov nyuaj los qhia qhov tseeb tus nqi, uas tuaj yeem yooj yim ua rau kev txiav txim siab tsis raug hauv kev ntsuas.
