These balloon-filling instructions are based on Totex balloons, but they also apply to other meteorological balloons.
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Load the additional weights that are needed to obtain the required lift, for example,
Vaisala Filling Balance FB13 weights as in the figure below.
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Secure the neck of the balloon to the balance nozzle with a clamp as shown in the
figure below. Look out for sharp objects near the filling balance so that no damage is
caused to the relaxed balloon.
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Turn on the gas from the pressure reducing valve. Let the gas flow slowly into the
balloon. Do not leave the balloon-filling shed while inflating the balloon. Follow the
balloon manufacturer's instructions when inflating the balloon.
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When the balloon is sufficiently filled, in other words, the balloon just raises the
gas nozzle, close the gas valve.
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Before removing the balloon from the gas nozzle, tie the neck of the balloon tightly
above the balance nozzle with approximately 0.5 m (2 ft) bit of string.
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Remove the balloon from the gas nozzle.
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Fold the neck of the balloon over and secure firmly. Cut off any extra string. The
figure below shows an example of a secured balloon neck. In the figure, the balloon is
attached to a balloon holder hook to make the installation of the unwinder hook to the
folded balloon neck easier.
