TruTrak ADI Pilot II - Manual (Page 8)

TruTrak Flight Systems ADI Pilot I & II Autopilot Installation Manual
December 2009 6 8300-012 Rev B
ADI Pilot I & II Ground Checkout
Once wiring is completed the autopilot should be tested in the aircraft while on the ground. The first step is to enter the setup
mode on the autopilot and set all parameters to their correct values. Apply power to the autopilot programmer.
When power is first applied to the unit, the display will show three flashing dash (“–”) characters. After approximately ten
seconds, the autopilot is ready to be set up for operation, indicating three non-flashing dashes on the display. (If a GPS unit
happens to be connected to the autopilot, has a valid position fix, and is running at the correct baud rate, the autopilot will
indicate the word “OFF” instead of the three dashes.)
Engage the autopilot by pressing and releasing the lower right knob. Then press and hold the knob for approximately 5
seconds, until the first setup screen is displayed.
This display will show a flashing “1” and a two-digit number from 0 to 24, representing the lateral activity level. With the
activity setup screen on the display, rotate the lower right knob as necessary to adjust the lateral activity value to a value of 1 or
2. Press and release the lower right knob to enter the activity value and advance to the next screen.
The second setup screen, with a flashing “2” is used to set the lateral torque. Rotate the lower right knob as necessary to adjust
the torque value close to the maximum value of 12. Once that is done, press and release the lower right knob to enter that
value and advance to the next screen.
The third setup screen, with a flashing “3” is used to set the micro activity. This setting should be left at zero unless advised by
the factory. This setting is used to remove lost motion from the control system. Press and release the lower right knob to
advance to next setup screen.
The fourth setup screen, with a flashing “4” is used to set the baud rate (speed) of the serial interface to the GPS receiver.
Select either 48 or 96. Where 48 is a baud rate of 4800 and 96 is a baud rate of 9600. Having chosen the desired baud rate,
press and release the lower right knob to enter that value and advance to the next screen.
The fifth setup screen, with a flashing “5” is used to set the vertical activity ADI P II ONLY. With the activity setup screen on
the display, rotate the lower right knob as necessary to adjust the lateral activity value to a value of 1 or 2. Press and release
the lower right knob to enter the activity value and advance to the next screen.
The sixth setup screen, with a flashing “6” is used to set the vertical torque ADI P II ONLY. Rotate the lower right knob as
necessary to adjust the torque value close to the maximum value of 12. Once that is done, press and release the lower right
knob to enter that value and advance to the next screen.
The seventh setup screen, with a flashing “7” is used to set the minimum airspeed. A setting of “- -“ shows up when the lower
right knob is rotated CCW. This setting means, “no minimum airspeed check is done.” Turning the lower right knob CW from
here means, “below this airspeed, flash “A_S”. Since the first column is flashing the digit “7”, only the least significant two
digits of minimum airspeed are shown, but a leading “1” is implied any time the second two digits are showing a value less
than fifty. Once the minimum airspeed is done, press and release the lower right knob to enter that value and advance to the
next setup screen.
NOTE: THE MINIMUM AIRSPEED SETTING ONLY APPLIES TO THE WARNING DISPLAY, NOT TO THE
ALTITUDE HOLD AUTOPILOT ITSELF! THE AUTOPILOT WILL FLY AIRCRAFT DOWN TO A STALL, SO DO
NOT LET THIS HAPPEN.
The eighth setup screen, with a flashing “8” is used to set the static lag ADI P II ONLY. Do not adjust this setting unless
advised by the factory. This is used to compensate for static systems that have long static lines, or small diameter static lines.
Press and release the lower right knob to advance to the next setup screen.
The final setup screen, with a flashing “9” is used to set the vertical micro activity and the vertical half step drive ADI P II
ONLY. The half step drive mode is selected by rotating the lower right knob CCW until the display shows “- -“. This should
only be used if one notices in extremely smooth air, a slight “bobble” of the nose every few seconds. The vertical micro
activity portion of this setup mode will only be used if half step drive is not required. The vertical micro activity setting should
not be adjusted unless advised by the factory. This setting is used to remove lost motion from the control system. Press and
release the lower right knob to finish.
The ADI PILOT SERIES - GYRO setup screen, with a flashing “-I” is used to set the roll gyro sensitivity if the unit is an ADI
PILOT SERIES - GYRO. Adjust the roll sensitivity by rotating the lower right knob CW. The higher the number the more
sensitive the AP will be to roll disturbance and the less sensitive to azimuth disturbance. Adjust this setting to eliminate
hunting at low airspeeds. Press and release the lower right knob to leave the setup mode.
The ADI Pilot I & II display will now return to its disengaged (off) state, which is three “–” characters if no GPS fix has been
obtained, or “OFF” if a GPS position fix has been obtained, and the “AP” light will turn off as well.