0 a device for measuring the strength of an electric current in units called amps
1 a device that measures the strength of an electric current in amperes
Each horizontal row comprises the ammeter belonging to feeders which are supplied through a given group switch.
The panel which carries the standard instruments also carries ammeters used to measure current to auxiliary circuits in the power house.
The scale may be completed by marking the positions of the pointer when other currents of known strength flow through the ammeter.
They were all up to capacity, save the ammeter from the coils.
A moving coil permanent magnet ammeter provides the basis for this.
Todays average clamp-on ammeter is not accurate enough at such a small scale.
The current is amplified and displayed on an ammeter.