Diagram for testing open- or short-circuited generator armature coil with ammeter.

Armature Coil

Diagram for testing open- or short-circuited generator armature coil with ammeter.

Diagram of set-up when coils are open-circuited.

Open-Circuited

Diagram of set-up when coils are open-circuited.

Voltmeter test diagram for open-circuited field.

Voltmeter

Voltmeter test diagram for open-circuited field.