The standard foundation for the ground installation is a concrete foundation. For the recommended minimum dimensions, see the following figure. Mounting screws and bolts are included in the delivery as well as a setting tool for the wedge bolts.
|Vaisala recommends that the back door of the ceilometer (the side where the measurement unit is) faces north in the northern hemisphere and south in the southern hemisphere. This protects it from midday sun.|
You can either use an existing concrete foundation or create a new one.
|If CL61 replaces another Vaisala ceilometer using a 4‑bolt mounting system, for example CL51, the existing foundation and foundation screws can be used.|