2. Place the radiosonde on the ground check device. Check the markings on the
cardboard box and the device for the correct placement of the radiosonde.
When the radiosonde is prepared outdoors with Ground Check Device MWH322,
Vaisala recommends that the radiosonde is prepared in its cardboard package to
provide extra protection for the radiosonde sensor. Remove the foil bag before the
preparations.
3. Pull the strap over the radiosonde. The radiosonde is switched on automatically. The
sounding software automatically detects the radiosonde and begins the sounding
preparations.
4. During the radiosonde
pre-flight preparation phase, several steps are carried out. These
consist of ground check procedures for sensors, as well as optional features for setting
the radiosonde
in-flight operation parameters, such as a timer for turning the
radiosonde power o after a desired time or altitude.
5. After the ground check is
finished, the sounding software indicates the results with a
message. Remove the radiosonde from the ground check device.
6. If you have prepared the radiosonde in its cardboard box, remove the radiosonde from
the box when the ground check is
finished.
Before you launch the radiosonde, you can return to the preparation phase by releasing
the strap around the radiosonde. The sounding software automatically returns to the
ground check phase.
If there is any delay in starting the sounding, for example, if you must wait before
launching the sounding balloon, you can switch the radiosonde
o by pressing the
power switch. When you are ready to launch the balloon, switch the radiosonde back
on.
RS41-SGM User Guide M211752EN-E
28
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