Protocol Dronium One AP, Instruction Manual, Page: 12 / 23

ALTITUDE SENSOR CALIBRATION
BEFORE STARTING THE ENGINES,
CALIBRATE THE ALTITUDE SENSOR.
DO THIS BEFORE EACH FLIGHT
EVERY TIME!
TO CALIBRATE ALTITUDE SENSOR
Fig. 1
Calibration Button*
* Press down once to calibrate. Lights will flash quickly during calibration
and then go steady when completed. Don’t worry if you press it again as
it will simply recalibrate again.