The buzzer sound is produced when the rate of climb is close to, but has not yet reached
the specified Climb threshold. This value is set between 0 and 9 with each unit
corresponding to be 0.1 m/s, ie. 3 is 0.3m/s. Subtracting this decimal value from the climb
threshold will give us the value at which the VARIO will start buzzing. For example with the
VARIO 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. Also, at the 0.1m/s directly below the Climb
threshold the VARIO will emit a constant sound varying rapidly in pitch from around 100hz
to the set base frequency at which the first beep is emitted. Setting the Buzzer value to 0
will disable the buzzer feature.
Although the Buzzer will sound very annoying on the ground it becomes an amazing
companion in flight allowing the pilot to pick-up thermals he would have usually missed.
Figure. 16- Buzzer illustration
A practical example of the advantages of the buzzer feature can is illustrated in Figure. 16.
In this example both pilots are sinking at -1.0 m/s. The orange paraglider has a VARIO 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 usual vario for which the climbing threshold is set to 0.1
m/s.
As shown in the figure, 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 Next to Climb brrrrr sound of his VARIO, 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 pilot starts
Document version: 2.0 Page 22
Airmass
Pilot Rate
of climb
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