MGL Avionics Stratomaster Ultra Horizon XL Owner’s manual
Page 60
We recommend to mount the sensor package using glued on strips of velcro material. This allows
for easy alignment of the sensor package horizontal to the earth magnetic field.
Never perform the deviation compensation procedure or a compass swing if your aircraft is
placed on a reinforced concrete apron or tarmac. The steel that may have been used to reinforce
may have a very significant effect on the strength and direction of the magnetic field at your
location.
To start the deviation compensation procedure, enter the menu and select “Deviation SET”. You
will see the following display:
Place your aircraft in flight attitude. For example, if you own a tail-dragger, raise the tail. Some
tricycle gear aircraft may need to raise the nose gear slightly. The object is to place the sensor
package as close to horizontal attitude relative to the earth’s surface as you can.
Press the “+” key or have an assistant do this for you if you are busy holding up your aircraft’s tail.
Press “+” to start the deviation compensation procedure.
You will now be presented with the following display. Please note that you have to have a SP-1,
SP-2 or SP-3hc connected or else the display will not show and you will be directed back to the
menu.
Current
magnetometer
sensor readings
Maximum readings in each
direction – these values will
be used for the deviation
compensation.
