Infinity and Velocity Singles Calibration Mode
Several Infinity and Velocity Singles have a 'Calibrate' mode that allows you to re-calibrate sensors such as airspeed/altitude and battery current zero.
To enter calibration mode:
1. Press the knob repeatedly DURING startup of the instrument:

2. During startup you will notice the word CALIBRATE appears on the screen, but then the instrument boots as normal:
3. AFTER boot up, enter the regular menu as normal by clicking the Knob:
4. Roll the Knob until you get to the Calibrate menu (not visible in normal mode):
5. Adjust the desired calibrations:
After adjusting calibrations you may exit the menu and operate instrument as usual.