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Operating Manual CHM 8k
R1.7 / 01-2020
Installation 15
6
Installation
NOTICE

The operator of the
CHM 8k is responsible for creating and dimensioning the foundation. The
foundation must be dimensioned so that it can cope with the permanent stress caused by the
weight of the equipment and external influences.

To prevent the ingress of dirt or moisture, the device must not be opened during installation and
commissioning.
The
CHM 8k ceilometer is installed on and fixed to a suitable concrete foundation. Integrated leveling
screws on the underside of the foot allow the device to be vertically aligned and thus facilitate the vertical
orientation of the measuring unit.
Install the CHM 8k in a protected outside area. Avoid radiation from strong light sources. The sun radiation
angle must be ≥ 15° to the vertical. Please request a suitable angle adapter. The distance to trees and
shrubs must be selected such that leaves, and needles do not reach the light emission apertures of the
device. When installing the
CHM 8k, the following minimum distances must be observed:
- to radio devices 2.5 m
-
to stationary transmitters / base stations (≥ 100 W transmission power)
25 m
- between two ceilometers (optical interference possible) 10 m
6.1 Installing the
CHM 8k
6.1.1 Preparatory work
The
CHM 8k requires an installation area of 50 x 50 cm. It must be stable, firmly installed and mounted
on an adequately sized concrete foundation. The inclination of the installation surface must not exceed 5
mm/m. Before installing the
CHM 8k, holes must be drilled and dowels inserted in the concrete foundation
(ø 12 mm, 4 dowels are included in the delivery), in accordance with the drilling template (see Figure 4).
It is important to pay attention to the opening direction of the exterior door to the
operator’s connection
box.
Figure 4 Drilling template.
1 Drilling template
2 Drill holes (ø 12 mm) for fixing
3 Possibility of electrical connection (connection box)
4 Opening direction of the exterior door