User`s guide

Chapter 3 _________________________________________________________________ Operation
VAISALA_________________________________________________________________________ 9
CHAPTER 3
OPERATION
This chapter contains information that is needed to operate this
product.
General Sounding Instructions
For a successful sounding, it is essential to carry out the pre-launch
steps as instructed and always in the same way.
Before preparing the radiosonde, prepare the balloon and (if
necessary) parachute or cardboard sheet and rigging. Details for
proper and safe balloon preparation are provided in the following
section.
Prepare the Balloon
The balloon and rigging (when necessary) must be prepared before the
radiosonde. This is necessary, as the radiosonde must be launched
within 15 minutes of battery activation.
WARNING
It is essential that you read the safety instructions in Appendix A on
page 25 before proceeeding. Carefully study the instructions for use
of the hydrogen generator and for the correct method of inflation.
1. Attach the balloon to the gas nozzle by securing the balloon with
string or clamp.