TruTrak DFC Operating Manual - Manual (Page 8)

7
the digital altimeter. For
example, pressing enter
between 4950 and 5050 will
select 5000.
-press enter-
Altimeter Sync
With the autopilot engaged,
the internal altimeter can only
be set when the aircraft is level
in the
ALT HOLD mode. To
accomplish this, press [ALT],
once in order to display the
current altimeter reading. Then
rotate the encoder to set the
internal altimeter to agree with
the primary altimeter. When
this is done press enter.
When the above altimeter
correction has been entered the
aircraft will climb or descend to
again be at the displayed
selected altitude.
When the autopilot is not
engaged, pressing [ALT] once
will bring up the
ALTIMITER
SYNC
screen. Note: Be certain
the autopilot screen indicates
ALTIMETER SYNC
and not
SEL
ALT
as the screens are similar
but have entirely different
meanings. The procedure is
then the same as with the
autopilot engaged. When
power to the autopilot is turned
on the altimeter will show the
same altitude as displayed at
power shut down, thus if this
was done at field elevation, it
should show field elevation.
Altitude Select Mode
CURRENT ALT 8000
ALTIMETER SYNC
CURRENT ALT 2200
ALTITUDE HOLD
Pressing [ALT] twice will
display the
SEL ALT
set up
screen.
TRK 183 AH 2200 SEL
183 ALT HOLD
At this screen
SEL ALT
numerals are underlined so that
rotation of the encoder selects
the target altitude. When this is
done press enter.
SEL ALT 4500
SEL AS 165
If a higher altitude has been
selected, the pre-set (best-cruise
climb) air speed is now
displayed and underlined.
SEL ALT 4500
SEL IAS 165 KTS
This value can be modified by
rotating the encoder knob.
When the knob is out each step
is 5 Knots and when depressed
each step is 1 Knot. When air
speed has been set, press enter
and the altitude transition will
begin. The autopilot will then
revert to the normal flight
display.
Also,
SEL
direction will
again be underlined. Both
selected altitude and air speed
can be modified while in
transition. Press and release the
TRK 183 SA 4500
SEL 183 SAS 165