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2
：
The reason for making the PITCH stick in the center when helicopter is hovering by adjusting
PITCH curve is to set them as the corresponding fail safe positions in the next step [fail safe setting].
4.2 Fail Safe Setting
The purpose of setting fail safe is to let helicopter hover still under fail safe
mode when it loses signals from remote controller. Tips as followings：
1)
The fail safe position has already been set as 0% (center) when users do PC
software setting.
2)
Set other channels as hovering center points in he fail safe option of remote
control, to make it convenient for XP3.1 to supervise if the communication of
remote control is normal and respond in time.
3)
To observe if the green LED Status Indicator will flash after turning off the
remote controller.
4.3 Compass Calibration
1)
【Entering into the Compass Calibration Mode】：
Under the manual mode,
shift the autopilot/manual switch to and fro ten times quickly (being back
and forth as one time).then it will enter the compass calibration status and
the green LED will be constantly on。
2)
【Horizontal Axis Calibration】：
When the red LED is off, keep the helicopter
horizon (the white LED will be constantly on) and rotate the helicopter 3-4
circles slowly in horizon. When rotating, make the white LED on as constantly
as possible. (Refer the video of compass calibration for details). After
finishing the calibration of horizontal axis, continue that of the vertical axis.
Attention：
If the white LED is off, it means the helicopter deviate from the horizontal
angle too much. Then, users should adjust the position of helicopter, and keep
it at the horizontal position and do rotation again.
3)
【Vertical Axis Calibration】：
When erect the helicopter (head down), the
red LED will constantly on. Then keep the white LED constantly on and rotate
the helicopter 3-4 circles slowly by the longitudinal axis (refer the video of
compass calibration for details).
4)
【Whether to Save the Calibration Date】
：
a)
Saving Calibration Data：
Shift the autopilot/manual switch ten times
quickly, then all three LED will flash for 5 seconds, which means the
success of the data saving and the existing from the compass
calibration mode(the green LED will be off). Please restart the system
