How to set scoreclock (Model ISC9000 ):

To set Game Time: 

All timers must be stopped. 

Press “GAME TIME”. 

Enter Minutes value on numeric keypad. (press "2" twice for 22 minutes)

Press “ENTER” three times

Setting 2 minute buzzer:

Press “SHIFT” until cursor appears on desired value. 

Enter Minute value on numeric keypad.  (press "2" for 2 minutes)

Press “ENTER” twice 

Shift timer will operate when game timer is running. ‐ To disable Shift Time to 0:00. 

Manual found at: https://nepeanringette.ca/wp-content/uploads/2014/07/OES_ISC9000.pdf