Lufft CHM 15k, User Manual

Page: 15 / 73

Operating Manual CHM 15k R13 / 07-2019
Installation 15
6
Installation
NOTICE

The operator of the CHM 15k 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 15k 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 15k 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 in
stalling the CHM 15k, 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 15k
6.1.1 Preparatory work
The CHM 15k 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 15k, 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
2
1
3
4