Battery And Reserve Battery; Additional Functions Of The Iq Instrument Series; Net Vario - Brauniger IQ-CLASSIC Operating Instructions Manual

Battery and reserve battery

In this IQ series, each instrument has a main battery and a reserve
battery. The On/Off switch has 3 positions.
The centre position = 0 means "Off"
Switch to the left = I means the main battery is active
Switch to the right = II means that the reserve battery is active
Main battery : Two 1.5V Mignon (AA) size batteries
Reserve battery: Two 1.5V Micro (AAA) size batteries
Due to their higher capacity and to avoid leaks, we recommend
that you only use quality alkaline batteries. This will result in
operating times of approximately 60 hours for the main battery
and approximately 30 hours for the reserve.
If the voltage of the main battery drops, you can switch over to
the reserve by moving the switch quickly so as not to interrupt
the power. Battery voltage is continually monitored by the
instrument and appears as a beam in the display.
Attention: When switched off, the clock and the flight-data
memory are supplied with power from battery II. The main
battery can therefore be replaced without any loss of data.
However, if the reserve battery needs replacing, the instrument
should first be switched to battery I. (There will then be no loss
of data). Please note that all batteries have a lower capacity at
low temperatures. It is perfectly possible for the display to
indicate 50% when the instrument is warm and then to fall to
20% one hour later in the cold.
Important!
If the instrument will not be used for a longer time, please
remove batteries! Even batteries seems to be "leak-proof"
they can and do leak! Any damage by a leaked battery
(battery acid on the circuit board) is not covered by
warranty from Bräuniger GmbH!

Additional functions of the IQ instrument series

Net vario

Compared to a normal vario in which the pilot's vertical speed
net
is displayed, a net-vario displays the rise and fall of the
surrounding air. However, this will only function if a polar is
saved and flying takes place with a speed sensor.
Therefore, because the display must always be zero in calm air
no matter how fast the pilot can fly, this function is ideal for
checking the polar set. The net-vario is also really meaningful
when it is a question of deciding whether to continue a fast
flight or, based on a presumed thermal, to break off the flight
and enter the thermal.
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