TruTrak EFIS (8300-056) - Manual (Page 6)

TruTrak Flight Systems 4 EFIS Installation Manual
February 2009 8300-056 Rev B
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.
BARO & TRK SELECTION
In the TruTrak EFIS display,
both barometer BARO and
direction TRK, the green
triangle bug, are directly set
by rotation of dedicated
knobs.
DIMMING
Dimming of the display is
accomplished by press and
release 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. Depressing the soft key
beneath SET DG provides a screen for correction any drift in the DG that may occur. Natural progression
will be reduced with repeated DG SET.