Trio Avionics Pro Pilot - Manual (Page 51)

Trio Pro Pilot Manual 3.8
51
as shown.
To set the servo direction, perform the following steps:
1. Select the CONFIGURATION SETTINGS menus as detailed previously
2. Press and release the H MODE button. The arrow
will be placed at the polarity field (NM or RV)
3. Press and release the V NAV servo button. The
servo will drive to it's zero position
4. Rotate the encoder knob clockwise. Observe that the
elevators move in a direction that will cause the
airplane to climb.
5. If this is correct, proceed to step 7. If not, continue
6. Press and release the encoder knob. Observe that
the servo drives back to center and the DIR field
changes to the opposite polarity RV(NM). Repeat steps 4 and 5
7. Press and release the H MODE button. Record the polarity for future reference.
The VNAV SERVO SET is complete and the encoder can now be used to select another menu screen.
Press the H MODE button to remove the arrow.
Once the servo direction is set correctly, the result is stored in non-volatile memory and need not be
adjusted again.
NOTE: As a safeguard, the servo direction cannot be set while airborne. Some parameters in the
CONFIGURATION menu cannot be accessed when there is airspeed or GPS groundspeed
present.
Initial Setup of the Horizontal Navigation Servo
The HNAV SERVO SET menu screen allows setting both the servo zero position and the direction of
rotation of the H NAV servo. The proper direction of rotation of the servo and the initial zero point must
be assured
Initially the screen will appear as shown. 7500 is a reference
number denoting the servo center position. Limits of these
reference only numbers are 6000 to 9000.
To set the H NAV servo zero position and direction, perform the following steps:
1. Enter the CONFIGURATION SETTINGS menus as detailed previously and select the HNAV
SERVO SET menu.
2. Press and release the H MODE button. The arrow will be placed at the direction
3. Press and release the HNAV servo button. The servo will now drive to its mechanical zero
position and the display will read the factory setting of 7500.
4. Rotate the encoder knob clockwise. Observe that the H NAV servo moves in a direction that will
cause the airplane to turn to the right.
5. If this is correct, proceed to step 7. If not, continue
6. Press and release the encoder knob. Observe the direction field changes to the opposite
polarity RV(NM). Repeat steps 4 and 5
7. Rotate the encoder to a setting that puts the ailerons in their normal, in-flight neutral position.
Record this number and the polarity for future reference.
8. Press and release the H MODE button.
The HNAV SERVO SET procedure is complete and the encoder can now be used to select another
menu screen. Once these servo directions are set, the result is stored in non-volatile memory and need
not be adjusted again.