8)
Next, turn off all the 8 switches on DIP SW2 and turn on all 8 switches on DIP SW1. Insert the
time card with the black stripes facing down and the right edge of the card flush with the right
side of the clock base. If it reads correctly, it will beep twice. If not, it will beep once. (This step
calibrates the ATT 310 for the blank area of the card)
9)
Once the unit has accepted the blank area of the card,
PRESS THE RESET SWITCH ONCE
10)
Turn off all 8 switches on DIPSW1
This completes the re-calibration where the control board has not been removed or replaced
