Dynon Avionics Internal Compass - Manual

Instructions for EFIS-D10 Magnetic Calibration
Dynon Avionics
August 27, 2003
This document describes the procedure for in-plane magnetic calibration of the EFIS-
D10. This procedure involves performing maneuvers both on the ground and in the air
with the EFIS-D10 connected to a laptop PC running the EFIS-D10 Magnetic Calibration
program. At the end of the maneuvers, the laptop calculates the calibration constants and
uploads them to the EFIS-D10.
To perform the calibration, you will need the following:
1) EFIS-D10 installed in aircraft with PC connection to the EFIS-D10 available.
2) Laptop with the latest version of the EFIS Support Program installed (to input the
magnetic dip angle into the EFIS.)
3) Magnetic Dip angle known. Refer to the EFIS-D10 Installation Guide or the
EFIS Support Program help files for information about determining the magnetic
dip angle and loading it into the EFIS-D10.
4) The EFIS-D10 Magnetic Calibration program downloaded from our web site and
loaded on the laptop.
5) An accurate method of aligning the airplane with North on the ground. We have
used a compass rose at the airport for this.
6) Appropriate cables to connect the laptop to the EFIS.
Once you have the installation completed and verified, a laptop connected to the EFIS-
D10 with the EFIS-D10 Magnetic Calibration program, and a place to perform the
calibration, perform the following steps:
1) Turn on the EFIS-D10 and allow it to warm up for at least 15 minutes before
performing the calibration.
2) Start the EFIS-D10 Magnetic Calibration program on the laptop PC. On the EFIS-
D10, navigate the menus to SETUP->MAGCAL. When you press the MAGCAL
button, the program will indicate that it is receiving magnetic calibration data. If
this message is not displayed, check if the data is available on one of the other
available COMM ports using the pull down window in the EFIS-D10 Magnetic
Calibration program window. If no data is available on any of the COMM ports,
check your cabling to make sure it is correct.
3) Note that pushing the GNDNRT, AIRRGT, or AIRLFT buttons in the following
steps will not result in any change on the EFIS display. However, the PC
program’s display will change with each button push.
4) With the plane in the normal flight state (engine running, all instruments and
avionics on), align the plane to point as close as possible to magnetic North.