Manual

(1) Introduction
The IQ Sonic is an “audio only” vario. It has been
especially designed for pilots who want to enjoy
free flight with the minimum of technology, and
also as a reliable back-up instrument for cross
country and competition flying.
It is also great for coastal soaring, where an
altitude indication is of little importance.
(2) Acoustic Scale Indication
Although the IQ Sonic has no optical indication of
climb rate, the critical point between 1 m/s and 1,5
m/s (200 ft/min and 300 ft/min) is indicated
acoustically. Often it is not worth circling in a
thermal at less than this climb rate (unless the
conditions are really weak). This is why the timbre
of the climb tone changes ( this is the “Acoustic
Scale Indication”) when a climb of 1,3 m/s (260
ft/min) is exceeded. This is in addition to the
normal acoustic information which indicates your
climb rate in the thermal and helps to make the
correct decisions.
(3) Power Supply
The IQ Sonic is powered by a standard lithium
battery of the kind used in cameras. This battery
can be purchased in many photo or electronics
shops. The battery capacity is approx. 200 hours
of flying. A big advantage of lithium batteries is that
they loose almost none of their performance in
very cold conditions.
Lithium Battery CR2450 (3V, 500mAh)
The case must be opened to change the battery.
Unscrew the two screws then pull off the front part
of the case and carefully lift out the board. Pull the
old battery from the clamp and insert the new one.
Make sure the polarity is correct! The plus (+ on
battery) must touch the clamp arm, the negative
must touch the metal ring (“neg”).
(4) Mounting
The IQ Sonic is mounted with Velcro. Stick the
hook side of the self adhesive Velcro strip to the
flat side of the case. You may have to trim the
Velcro a little to make it fit.
Stick the loop side of the Velcro wherever you
want your vario to be, e.g. to your helmet. Special
holes in the board and case allow the sound to be
reflected to all sides. Choose a place on your
helmet close to your ear so you can hear the
sound of the vario easily.
Because of the small dimensions and the low
weight of the IQ Sonic it is possible to mount the
vario in many other positions, e.g. to your flying
suit, or the shoulder straps of your harness, for
instance Experiment to find the optimal mounting
position!
(5) Switch Positions
The IQ Sonic is switched on with the main switch.
This switch also turns on or off the sink tone of
your vario.
Switch pos: - I- Instrument ON, sink tone OFF
Switch pos: - 0 - Instrument OFF
Switch pos: - II - Instrument ON, sink tone ON
(6) Adjustment of Volume
You can adjust the volume of the IQ Sonic to
adapt the sound to suit individual perception and
positioning. To adjust the volume the case of the
IQ Sonic must be opened. The volume can then
be adjusted with a small screwdriver by carefully
turning the potentiometer (see picture). The
potentiometer is located on the board and
designated “Vol”.
Turning clockwise: Volume UP
Turning counter clockwise: Volume DOWN
Warning! Never turn the potentiometer with no
designation (see picture). If this potentiometer is
altered then the calibration of the IQ Sonic will be
changed which will make the instrument
inoperable. It must then be re-calibrated at the
factory for which there will be a charge!
(7) Adjustment of Sink Tone
You can adjust the point (sink rate) when the sink
tone will start to sound. Open the case and
carefully
turn the small potentiometer on the board
designated “Sink”. The sink tone start point can be
adjusted within a range of – 0,1 m/s to – 5,0 m/s
(- 20 ft/min to –1000 ft/min)
Turn clockwise:
sink tone starts at higher sink rate
Turn counter clockwise:
sink tone starts at less sink rate
NO!
9OK!
Volume
9OK! Sink