Voolutugevusmõõtur on tavaliselt ühendatud ahelaga, milles voolu mõõdetakse, ning tal on tavaliselt madal sisetakistus, nii et see ei põhjusta mõõdetava vooluringi olulist voolu langust.
An ammeter is usually connected in series with the circuit in which the current is to be measured, and usually has low resistance so that it does not cause a significant voltage dropin the circuit being measured.