Topodrone SA
CHE-354.723.874 TVA
Rue du Centre 39, 1637 Charmey, Switzerland
+41 797 910 713
www.topodrone.org
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Compass calibration.
As the basic model, on DJI Phantom 4 Pro Topodrone PPK needs the compass calibration (CC) each
time you move to the new location
. CC helps your drone to adapt to local magnetic field lines. During CC,
the accelerometer and the compass of your drone make two rotations in different axes. After that, the drone
makes an adjustment between the values of each sensor. To perform correct CC, follow the next steps:
1.
CC is performed directly before the first flight at an open outdoor area. Making CC indoor is
useless.
2.
Remove the gimbal holder.
3.
Turn on the drone and the RC, insert the mobile device.
4.
Make sure that there are no large metal constructions or
magnetic fields in 50 meters range.
5.
Turn your drone into CC mode. At least there are two ways:
a)
In the DJI Go 4 app open MC Settings / Advanced settings
/ Sensors state / Compass / Calibrate compass / OK
b)
At the front left side of RC, rapidly move the slider to S
and T positions not less than 4 times.
6.
Ensure that rear LEDs of the drone lights are solid yellow.
7.
Put the RC in the left arm and take the drone with your right
arm. Hold drone from the top under the battery or like on the
photo. Do not change the orientation of the drone!
8.
Rotate your drone to the left side (counter-clock wise) in 380
degrees (a bit more than 1 turn). Stop when the rear LEDs
will change their color from solid yellow to solid green.
9.
Change the orientation of your drone, turning it in 90 degrees
in a longitudinal axis.
10.
Rotate the drone to the left side (counter-clock wise) in 380
degrees (a bit more than 1 turn). Stop when the rear LEDs
will change their color from solid green to blinking green.
11.
After using the 5a way entering CC mode, turn the Flight
Mode slider to P (central position). This is especially
important!
12.
Compass calibration now is complete.
Before and after CC you can check the value of magnetic
interference in the DJI Go 4 App – it should be at the green zone after
CC. If the app notices that you have failed, the compass calibration (rear
LEDs blinking red rapidly) – recalibrate the compass at another place
nearby.
Notice 1: no magnetic or ferromagnetic objects on the pilot’s body
are allowed. For example: massive jewelry, metal inserts or magnets on
the back plate of the iPad tablet etc. If you have some of these objects,
even after successful CC, your drone will have “Compass Error” after
taking off.
Notice 2: CC increases flight stability of the drone during the flight. But compass error can appear
even after absolutely correct calibration. It is usually caused by different external interferences such as
metal objects, large antennas, electricity transmission lines (ETL)
