VARIO SD will start buzzing. For example with the VARIO SD default values, Climb threshold=0.1m/s,
and Buzzer=3 (0.3m/s) the buzzing with start at -0.2m/s because 0.1 - 0.3= -0.2. In this case at 0.1m/s
directly below the Climb threshold the VARIO SD will emit a constant sound varying rapidly in pitch
from around 100hz to the set base frequency at which the rst beep is emitted. This is the buzzer sound
and may resemble a growl noise. Setting the Buzzer value to O will disable the buzzer feature.
Although the Buzzer will sound very annoying on the ground it becomes an amazing companion in ight
allowing the pilot to pick-up thermals he would have usually missed.
Figure 4.10: Buzzer
A practical example of the advantages of the buzzer feature can be illustrated in Figure
4.10
In this
example both pilots are sinking at -1.0 m/s. The orange paraglider has a VARIO SD for which the
climbing threshold is set to 0.1 m/s and the Buzzer parameter is set to 3 (0.3 m/s). The green paraglider
has a typical vario for which the climbing threshold is set to 0.1 m/s.
As shown in the gure, when both pilots enter the thermal nothing is heard. The air is rising at 0.1 m/s
but both pilots are descending at -0.9 m/s. In the second zone of the thermal the air is rising at 0.8 m/s,
and so pilots are descending at -0.2 m/s. At this stage the orange pilot starts to hear the Buzzer brrrrr
sound of his VARIO SD , which helps him to center the thermal, while the green pilot is still unaware of
the thermal. Finally, in the 3 zone, the air is rising at 1.2 m/s, and so both pilots climb at 0.2 m/s. The
VARIO SD pilot starts to hear his vario beep... beep... sound, and it is only at this point the green pilot
hears the rst beep from his instrument.
4.5.5 Auto Silent
Setting Auto silent option ON will keep the VARIO SD 's buzzer quiet until a Start Flight has been
detected. (see Section
1.7
) This function avoids listening the vario sound while waiting to take o. The
audio will then be kept active until the VARIO SD is switched o. The default value for the auto silent
parameter is ON.
4.5.6 Vario Integrator
The Integrated vario is calculated by integrating the vertical speed during a period of X seconds dened
by this value.
4.6 Screen
The screen menu option allows the user to set the Screen contrast
(Figure
4.11
).
19
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