In the distance measuring device, even if there are unmeasurable distance measuring regions, suitable estimate is set as the distance data of the unmeasurable region in accordance with distance data of the measurable distance measuring regions and the space on the object of the unmeasurable distance measuring region. The analysis system expresses all components of capacity loss for all chambers in each tool in terms of a full tool equivalent. A circuit is provided for transferring the energy from the solar panels to a battery charger which, in turn, official charges a battery.