CGOET "Manual" and "External" calibration?

[DroneCalzone]

Hello,

so in the camera settings menu for CGOET // H520 there is a position called "Auto calibration". When I open it, there are 3 options to choose from: auto, manual and external. Auto is default. How does one perform manual or external calibration? I reckon this calibration is to increase the accuracy of temperature readings, but how can it be done?

 

[SeeHigher]

I would like some information on how this works also

 

[RkamilC]

After some test, I don't find any differences, if anyone have any information about that option?