The phasing voltmeter tester allows line personnel to determine, in the field, the operating condition of the CHANCE instruments. The tester uses each instrument’s own meter to display its operating condition. The tester plugs into the jack on the instrument and meter readings are noted when the tester’s clip is contacted to each of the instrument’s two terminals and the tester’s polarity switch is in both of its positions. If all four readings are within two units, the instrument is in proper working order. Pulling the plug from the jack automatically disconnects the tester’s battery.