Storch ProDist smart Mode D'emploi page 111

Indirect measurement 2 (double Pythagoras)
determining a distance with three measurements
Press the button twice until the symbol
appears in the display. The distance to measure first
is shown as a flashing line in the symbol.
Point to the bottom point and press the button.
After the first measurement, the first value is dis-
played. Now level the laser measuring device hori-
zontally. Initiate the second measurement by pres-
sing the button.
Initiate the third measurement. Point to the top
point and press the button.
The result is automatically determined and shown in
the display.
111