Measuring surface area, building on each floor, measuring head installed on the Middle floor, building on each floor, with the exception of the Foundation or the ground floor of the building.
Sensing floor area on each floor. Install the probe in the center of the building on each floor except foundations and the ground floor of the building.
Measurement of the surface buildings in each layer. Make install probe the center floor on each floor except the foundations or on the ground floor of the building.