GRT Avionics, Inc.
May 2019
Sport EX/Horizon EX Install. Manual
23
Rev. A
4. Verify AHRS communications status is valid and that the AHRS status is OK. Verify
that the AHRS is receiving serial communications from the display unit by
confirming that there are no grayed-out data fields.
5. If a magnetometer is connected, verify that the PFD screen shows HDG next to
the heading box at the top-center of the screen. When no magnetometer is
installed, the heading display will be dashes until GPS ground track becomes valid,
which requires aircraft motion.
5-8: Setting AHRS Orientation
This first adjustment is an approximate setting to account for angled instrument panel
installations. You will fine-tune the instrument orientation again in-flight, after validating
the location of the magnetometer (if installed).
1. Access Set Menu > AHRS Maintenance. Scroll to
“Set Instrument Orientation”.
2. Enter the offset, in degrees, for each axis. Positive corrections correspond to right
roll, pitch up and right yaw.
See following figures (not to scale):
Instrument Panel Tilt
20° Pitch Down =
-20 Pitch Offset
Longitudinal Axis
Figure 5-1: AHRS Pitch Orientation Offset
