Instruction Manual
Operating controls 
As with our autopilot products, extensive attention has been given to providing the simplest operation. 
No sequential pressing of buttons is required to reach basic control functions and no additional button 
pressing is required to set values. 
Button labels    –  White - mode is OFF 
Green - mode is ON 
Click    –  Momentarily push and release 
 any knob or button 
Press     –  Push and hold any knob or 
     button for 2 seconds and release 
Enter  – Click appropriate knob 
BARO & TRK SELECTION 
In the TruTrak EFIS display, both barometer BARO and direction TRK are set by rotation of dedicated 
knobs. 
DIMMING 
Dimming of the display is accomplished by a Click of the left knob 
[DIM] and then rotating the knob Counter Clock wise to reduce the 
display illumination. External dimmer input will only control the 
button illumination. 
DIRECTION GYRO 
Normally this adjustment will not be necessary, as the HSI will be 
slaved to a GPS NMEA source. If there is a loss of the GPS source 
then the internal gyro backup will maintain the DG. Click the soft key 
(button) beneath SET DG provides a screen for correction of any drift 
in the DG that may occur by rotating the left knob to set the DG, and 
then click ENTER. 
Natural progression will be reduced with repeated DG SET. 
TruTrak Flight Systems  6  EFIS Autopilot Installation Manual 
April 2009    8300-057 Rev D 










