Supra Vision Control Owner's Manual page 54

Ballast Calibration: when the ballast is full or empty
and the display is showing that it is not full or empty,
the ballast will need to be recalibrated. Touch the
appropriate button that depicts the current state of
the ballast and it will be calibrated (i.e., if the Port
Ballast is full, touch Full. If it is empty, touch Empty).
2023-11-30 54 2301122