RISCO Group LuNAR DT AM Grade 3 Guia De Instalacion página 19

Return the protective sleeve back into place on the detector front cover.
Repeat steps 1 to 5 for the remaining 2 lenses.
NOTES:
Below 3.7m mounting height, the coverage diameter starts
decreasing, and at 2.7m height coverage diameter is 15m (50ft). For
customized coverage, it is possible to set the position of each lens to a
different height, according to the installation conditions.
18 Ind. LuNAR RK200DTG3 Installation Guide