User's Guide ______________________________________________________________________28 __________________________________________________________________ M210987EN-CRemoving the Battery CaseIf you need to remove the battery case from the radiosonde, use, forexample, a small coin to loosen the battery case. Push the coin into thesmall opening between the radiosonde and the battery case to loosen thecase and remove it. See Figure 19 on page 28.0809-005Figure 19 Removing the Battery CaseLaunching the RadiosondeThe radiosonde is now ready for launch.Attaching the UnwinderThe unwinder is used to unwind the suspension string gently andslowly. To do this, the unwinder must be attached firmly, so that it doesnot rotate relative to the balloon. If the unwinder moves freely, thesuspension string unwinds too quickly, and it is possible that theradiosonde 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