Patent ID: 8344732

Claim:
A measuring system comprising: a thionyl chloride based primary cell, a predetermined current discharge unit for causing flow of a predetermined discharge current, and an internal circuit for receiving supply of a discharge current from the thionyl chloride based primary cell, having a plurality of states differing from each other in magnitude of the discharge current, said internal circuit comprising: a cell voltage measurement unit for taking measurements on an output voltage of the thionyl chloride based primary cell and providing a cell voltage measurement value, a unit for providing a threshold voltage value, a state-transition controller comprising a comparator for comparing the cell voltage measurement value to the threshold voltage value and providing an output to said predetermined current discharge unit, whereby said predetermined current discharge unit is operative in a discharge mode to permit a discharge current to flow from said thionyl chloride based primary cell and cause removal of any chloride film from said thionyl chloride based primary cell, and wherein in the case of transition of the internal circuit to a state thereof, having a discharge current larger than the discharge current in the present state thereof, the transition is made according to results of a comparison by said comparator of a voltage measured by the cell voltage measurement unit with a threshold on the basis of a discharge current in a state before, or after the transition of the internal circuit.