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Chapter 2 __________________________________________________________ Product Overview
VAISALA ________________________________________________________________________ 7
CHAPTER 2
PRODUCT OVERVIEW
This chapter introduces the features and advantages of FB13.
Introduction to Vaisala Filling Balance FB13
Vaisala Filling Balance FB13 facilitates the use of radiosondes. It is
used as ballast for obtaining the correct nozzle lift (free lift plus
payload) for the sounding balloon. Nozzle lift refers to the weight a
balloon is capable of lifting when filled. In addition, the balance also
acts as a gas inflation pipe.
FB13 contains two different nozzles for convenient attachment of
balloons with small and large neck diameters. The balloon neck is
secured on the nozzle with a spring clamp. Each nozzle has a clamp of
its own and the nozzles are easily interchangeable.
During balloon filling, the required nozzle lift is obtained by loading
the nozzle with additional weight. The nozzle lifts from 1 kg to 2.5 kg
(from 2 lb 4 oz to 5 lb 9 oz) can be obtained by loading weights in
intervals of 0.1 kg (3½ oz) onto the nozzle. See Table 3 on page 8 for
details.