Dynon Avionics EFIS-D6 Installation Guide - Manual (Page 26)

EFIS Calibration and Configuration
4-4 EFIS-D6 Installation Guide
It is crucial that compass heading
calibration be done after the unit is
completely integrated into your
panel. If the unit is calibrated away
from the panel and then inserted at
a later time, it will be improperly
biased by the unique magnetic field
characteristics of your plane.
12. Wait for the message CALIBRATION COMPLETE before attempting to use the EFIS-
D6 or remove power. Press BACK to leave the menu.
This completes the EDC-D10A calibration process. The process can be repeated as often as
desired. The overall accuracy of the compass depends on the installation location (away from
any ferrous materials or current carrying wires or devices), the installation alignment (aligned
with the EFIS-D6 in pitch, roll, and yaw), and the calibration procedure (accurately aligning the
aircraft with North, East, West, and South and having the correct magnetic inclination angle
loaded into the EFIS-D6). If the compass performance is not adequate for your usage, we suggest
that you investigate each of these factors and try to optimize your installation for each factor.
If the heading shown onscreen is off by a small, but constant amount, you can change a heading
offset in the EFIS-D6 which will correct this. Orient your plane in a known direction, preferably
on a compass rose at the airport. Navigate to the Heading Adjustment menu by pressing SETUP
> MAGADJ. Increment or decrement the value of the heading offset until the EFIS-D6 heading
corresponds to the direction in which your plane is pointed.
EFIS-D6 (INTERNAL) HEADING CALIBRATION (ON GROUND AND IN FLIGHT)
NOTE: if you have installed the EDC-D10A Remote Compass Module, you do not need
to perform this procedure. Skip to the next section for calibration of the remote compass.
Because Dynon’s goal is to give the EFIS-D6 a
compass that is accurate in all attitudes, our user
magnetic calibration process is more comprehensive
than that for many other products. The magnetic field
vector in North America is predominantly vertical;
this requires that any complete calibration maneuver
bank the aircraft significantly in order to accurately
map out the unique magnetic signature of your plane
in this three-dimensional field. Therefore, a large
quantity of data needs to be recorded in a variety of attitudes. Simpler calibration processes do
not perform these steps and suffer by being accurate only at level attitudes. When properly
completed, a magnetic calibration of this complexity will produce a compass that is accurate
during banked maneuvers. Note that the EDC-D10A remote compass calibration process is not
as complex because it is assumed that you have mounted it in a more magnetically clean
environment. Three dimensional calibration has already been done on the EDC-D10A at the
factory.
Before proceeding with the calibration, ensure that you have determined and entered the
magnetic inclination (dip angle) and intensity as described above.
Performing the calibration
Perform the first portion of the heading calibration on the ground in an area where you can
accurately determine magnetic North such as on a compass rose. You must also have enough
room to perform a 540 turn on the ground as described below. Turn the EFIS-D6 on and let it
warm up for 10-15 minutes before proceeding. Turn all instruments on that you would normally
be operating during a flight, including the engine.