User's Guide ______________________________________________________________________
28 __________________________________________________________________ M210987EN-C
Removing the Battery Case
If you need to remove the battery case from the radiosonde, use, for
example, a small coin to loosen the battery case. Push the coin into the
small opening between the radiosonde and the battery case to loosen the
case and remove it. See
0809-005
Figure 19
Removing the Battery Case
Launching the Radiosonde
The radiosonde is now ready for launch.
Attaching the Unwinder
The unwinder is used to unwind the suspension string gently and
slowly. To do this, the unwinder must be attached firmly, so that it does
not rotate relative to the balloon. If the unwinder moves freely, the
suspension string unwinds too quickly, and it is possible that the
radiosonde hits the ground upon launch.
The unwinder is designed to be tied directly to the balloon.
If you cannot attach the unwinder directly to the balloon, for example,
when using a radar reflector or a parachute, sounding accessories are
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