Rain Bird ISM Instruction Manual page 29

sign (%) in front of the program letter. The
percent sign appears on all programs (A,
B and C) even if they are not selected.
5. After setting the desired SA percentage,
turn the Programming Dial back to
SYSTEM ON. All station run times will be
increased or decreased by the selected
Seasonal Adjust (SA) percentage.
ISM Installation, Programming & Operation Guide
Page 29