Casella CEL Nomad portable weather station - Manual (Page 10)

Check that all of the components have been delivered.
2.2 Siting
The measurements used in meteorology are intended to represent general
conditions over as large an area around the measuring point as possible.
To achieve the most representative local conditions, the Nomad should
be sited in an unobstructed area open to the sun and wind. This also maximises
the efficiency of the solar-panel power supply. Sites sheltered by trees or
buildings, in hollows or on the sides of hills are not recommended, neither are
sites on buildings, as none of these locations will give representative
measurements.
The Nomad Portable Weather Station is designed to meet these
conditions. It’s sensors are mounted on a cross-bar 2.0 m above the ground.
Undere severe wind conditions, using guy ropes or attaching sand bags will offer
additional stability.
The U.K. Meteorological Office (Met Office) recommends that the
instruments be installed over closely mown grass. For further guidance, refer to
the Met Office leaflets:
Making weather observations,
Manual weather measurements,
Automatic weather measurements,
Voluntary observations network.
2.3 Preparing for Use
Before leaving the laboratory or office to deploy the Nomad system, check that
the battery in the environmental case is charged.
1. With the handle uppermost, stand the environmental case on a
horizontal surface.
2. Support the weight of the door, undo the clips which hold it shut, then
lower the door.
3. Tilt the case backwards, to counterbalance the weight of the door as it
is opened forwards until the chains support it.
4. Press key 1 on the Sensus logger (Figure 1).
If the display backlight is lit and menu
information shown, go to step 8.
If the display remains blank, then the
battery in-line fuse is missing, or the
battery level is too low to operate the
system.
(Normally the battery in-line fuse is
removed from the Logger for long
term storage and transit.)
5. Check that the battery fuse is in place
in the in-line fuse holder in the red
(or brown) line, to the battery
(Figure 2). If missing, insert it.
6. With the fuse in place, if there is still
no activity on the display, connect the battery charger supplied to the
“Charge” socket on the right hand panel of the Sensus unit.
Commissioning
01096
Key 1 Key 2 Key 3 Key 4
13:45:00
22/12/2001
Figure 1: Sensus logger - display
and keys
Page 10 of 68
NOMAD Portable Weather Station
Users Handbook