Job Description:

• 1) Tests electrical units, such as lamps, coils, armatures, and commutators to determine shorts, grounds, or efficiency of unit, using test lamp, meter, or growler: Clamps test wires to electrical unit, screws unit into socket, or inserts lead wires into mercury tube to make contact with testing device.

• 2) Turns dials to set controls of test equipment and observes meter or test lamp which indicates acceptability of unit.

• 3) Places armature in growler and manually rotates armature under steel strip.

• 4) Listens for growling sound and watches for attraction of steel strip to armature surface indicating short circuit.

• 5) May inspect unit and remove excess solder, mica, or copper chips, using buffing machine, pick, or brush.

• 6) May demagnetize coils, using demagnetizing equipment.

• 7) May test carbon pellets with attached shunt wires to determine current flow through pellets, during production of carbon brushes.

• 8) May be designated according to unit tested as Armature Tester II; Carbon Brushes Tester; Coil Tester; Commutator Tester; Electric-Switch Tester; Light-Bulb Tester; Resistor Tester.