LX8000 (LX8080) Version 2.6
September 2011
Page 105 of 110
10.5.1
Installation of the Compass Module
The device consists of two parts: a compass sensor and an electronic device. Pay attention
to the flight direction arrow and install the compass unit horizontally. All connections are
plug-and-play so no mistake is possible. A RS485 splitting unit to extend the RS485 bus is
included. The compass module should be installed as far as possible away from magnetic,
electrical and steel parts (loud speakers and analogue vario indicators contain strong
magnets). Even the mechanical compass should be as far away from the sensor as possible.
The minimum distance is 20 cm. As mentioned above the arrows should be aligned
accurately in the flight direction and parallel to the fore and aft axis of the glider. For a
proper installation a flat area parallel to the horizontal plane is needed.
The orientation is clearly marked on the label which is on the bottom of the unit.
10.5.2
First Test After Installation
An external reference compass is required which can either be a prismatic landing compass
or a calibrated compass base on the airfield surface. Using the reference compass the glider
should be aligned in each of the eight main directions (360
°
, 45
°
, 90
°
, 135
°
, 180
°
, 225
°
,
270
°
and 335
°
). Now the glider should be oriented to the north direction whilst also
watching the HDG raw data on the compass calibration page (do not try to compensate the
compass yet). If the HDG varies more than
±
5° rotate the compass so that the deviation
decreases below
±
5°.
Now turn the aircraft to the other directions and read the displayed values (don’t change the
compass position anymore). If they vary more than
±
15° look for another place for the
compass module.
Wind
True airspeed
and true
heading
Ground speed and
ground track
Summary of Contents for LX8000
Page 2: ......
Page 81: ...LX8000 LX8080 Version 2 6 September 2011 Page 81 of 110 ...
Page 110: ......