DFUN Imiyoboro myinshi ya metero irashobora gupima voltage, ikigezweho, nimbaraga kuri buri muzunguruko mugihe nyacyo, byemeza imikorere ihamye ya sisitemu yingufu. Ubushobozi buhanitse bwo gupima butuma ifata mugihe cyimpinduka zingirakamaro mumashanyarazi, zitanga amakuru yizewe kubikorwa byo gufata neza no kubungabunga. Izi mbaraga za DC zigaragaza imikorere inoze yo gupima ingufu, gupima neza ingufu zose zikoreshwa mumuzunguruko, zifasha mugucunga ingufu no kugenzura ibiciro hifashishijwe isesengura rirambuye ryimikoreshereze yingufu.