The ASIV is not receiving consistent power from the battery and is resetting the test sequence. Remove the battery cover and check to make sure that the battery is making solid contact with the terminals. If this is not the problem change the battery with a new 9 volt alkaline battery.
The Alco-Sensor IV proceeds through test sequence but returns to the temperature display before it allows the subject to provide a sample.
by wpengine | Feb 5, 2018