The CNR 1 is intended for continuous outdoor use. It is weatherproof. The materials used in CM 3
and CG 3 are robust. Contrary to most competitive instruments, plastic domes are not used.
Therefore the CNR 1 requires very low maintenance. For optimal results however, proper care must
be taken. More about maintenance can be found in chapter 4. Chapter 5 can be consulted if a
problem with the CNR 1 is suspected; this chapter addresses trouble shooting.
The general user should read chapter 1 and chapter 4.