Vega AHRS-1 / AHRS-3 / MAG-1 Operating Manual
Page 11
Tilt Compensate (AHRS-3 only):
This allows installation of the AHRS-3 at angles other than vertical (face). Select this menu item once installation of the
AHRS-3 indicator is complete. The tilt compensation only needs to be performed once. This allows to set a pitch tilt of the
AHRS, keeping all speed related items affecting the accelerometers aligned correctly.
Level Calibrate (AHRS-3 only):
This function can be used to level the AHRS. It levels bank and pitch and sets the Z axis (up down) to 1G.
The level calibrate function here MUST be performed with the AHRS perfectly level, i.e. display in normal orientation at 90
degrees from the horizontal in both pitch and bank. This function “tweaks” the accelerometer sensor using the Earths
gravity as a reference.
This function takes around 10 seconds to execute. Keep the AHRS perfectly still until completed.
Note: The AHRS will refuse to perform this operation if real AHRS bank or pitch angle is greater than 10 degrees.
Reset Gyro Bias (AHRS-3 only):
Your AHRS gyros bias point is the point where your gyros report that you are not rotating around any axis. Gyro bias may
drift over time as the gyro chip ages. This function resets the bias to the current reading and is performed with the aircraft
on the ground, preferably in a hangar with no wind rocking the aircraft. The aircraft may be in any attitude but must remain
perfectly still during this procedure. After you activate this procedure it takes about 30 seconds to complete it. Keep the
aircraft perfectly still during this operation.
CAN TX AHRS (AHRS-3 only):
Select “ON” to output the MGL Avionics SP7 CAN bus messages. This gives the AHRS-3 the ability to emulate the MGL
Avionics SP7 sensor package.
