Trio Pro Pilot Manual 4.1
63
However, because a number of factors in the fuel system installation can affect this, the
K FACTOR
may
be calibrated to a more precise number. The adjustment range of the
K FACTOR
also allows various
selected fuel flow transducers to be used.
The calibration may be tested by filling the tanks and flying the
aircraft until the remaining fuel is down to 25% or less. This
will assure a large enough sample to determine accuracy. If it
appears that the fuel remaining is not the correct amount (it will
likely be very close) The
K FACTOR
may then be adjusted up
or down to improve the accuracy.
Rotate the encoder to bypass all menu items until
reaching the screen that displays “
ENTER K FACTOR
”.
Press
the
H MODE
button to replace the “=” sign with
an arrow. Rotate the encoder to change the value of the first
digit. Press encoder to advance to next digit. Press
H MODE
to exit.
A more precise method of calibration can be used to accurately determine the
K FACTOR
for factory
supplied or other manufactures of fuel flow transducers. If you need to calibrate the
K FACTOR
use the
following procedure:
Fill the tanks to a known level (full tanks are usually the best).
Zero
the
FUEL USED
on the appropriate screen (this will also
zero
FUEL USED
on the
CAL K FACTOR
screen shown below).
Fly the aircraft until most of the fuel has been used.
The
FUEL USED
field on this screen will now show the amount that the computer believes was
consumed. Then fill the tanks again and note the exact amount of fuel that was added.
If it disagrees with the display, press the
H MODE
button to display the arrow instead of the “
=
”
sign and rotate the encoder knob to enter the amount of fuel that was actually used
Then press the encoder button which will sequence to the screen shown below.
This process will re-compute the
K FACTOR
and the system will now be accurately calibrated.
When the
K FACTOR
computation is complete, the display will show the
original
K FACTOR
and the new one that was calculated by using the
method described above. This value will be retained in non-volatile
memory and should never need to be changed again.
This screen can be exited by rotating or pressing the encoder.
Setting Maximum Fuel Level
The
TOP OFF SETTING
requires the user to enter a value that is equal
to the amount of fuel when the tanks are completely full. This assures
that the Fuel Remaining readings will always be correct when the pilot
employs the
TOP OFF
feature after filling the tanks.
Setting Low Fuel Alarm
The
LOW FUEL ALARM
sets the fuel level at which the alarm will occur.
This should typically be a value that will allow at least 45 minutes of
continued flight. Setting this value to “0” will disable the alarm.