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Contents
Congratulations on your purchase of the new True Ai Vario sensor. We are delighted that you have chosen
a product from the MULTIPLEX range.
This new sensor now provides you with a means of measuring the actual speed of your model in the air, in
contrast to speed measurement “over the ground” using GPS. This means that the True Ai Vario sensor
counts as an important piece of equipment to any modeller who is keen to avoid the danger of his model stalling
unexpectedly. The inclusion of altitude measurement and an accurate vario function make the True Ai
Vario sensor an indispensable accessory for the ambitious glider / aerobatic pilot.
The model’s speed is measured by means of an accurate Prandtl (pitot) tube, which constantly monitors the
difference in air pressure. The model’s speed is calculated from the ratio of the ambient pressure to the pitot (sta-
gnation) pressure which varies with speed; the variation in air density, which varies with height above sea level,
is also included in the calculation. In contrast to conventional airspeed sensors, this process provides a correct
airspeed reading regardless of the model’s altitude.
The vario, altitude and speed sensor carries out an automatic zero calibration process every time the receiving
system is switched on.
1.
Introduction ................................................... 11
1.1 Special features ............................................. 12
1.2 Specification .................................................. 12
2. Installation ..................................................... 13
3. Using the sensor for the first time .....................15
4. Default set-up ................................................15
5. Configuration ................................................. 16
6. Problem solving .............................................. 17
7.1 Guarantee / Liability ........................................18
7.2 Conformity declaration ....................................18
7.3 Disposal .........................................................18
8. Accessories .................................................... 27
1. Introduction
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