21HOW TO - PROGRAM MODESSYSTEM SETUPTo Display Temperatures in ºF or ºC:1. PRESS and HOLD the "PROG" button for five, (5),seconds. (Display will flash GC450 and theprogram version number).2. PRESS the "PROG" button twice to display"SYSTEM SETUP".3. PRESS the "MENU" button to display "DISPLAYTEMP. IN : ºF/ºC".4. PRESS the "UP ARROW" button ( ↑ ) to changeºF or ºC.5. PRESS the "PROG" button to display "SYSTEMSETUP".6. PRESS the "RIGHT ARROW" button (→) to returnto the normal OPERATING MODE.To - Change the Speaker Volume, (High/Low):1. PRESS and HOLD the "PROG" button for five, (5),seconds. (Display will flash GC450 and theprogram version number).2. PRESS the "PROG" button twice to display"SYSTEM SETUP".3. PRESS the "MENU" button to display "ALARMVOLUME".4. PRESS the "UP ARROW" button ( ↑ ) to change(HIGH/LOW).5. PRESS the "PROG" button to display "SYSTEMSETUP".6. PRESS the "RIGHT ARROW" button (→) to returnto the normal OPERATING MODE.To Enable Hold Feature: (Chip Ver. 3.20 >):1. PRESS and HOLD the "PROG" button for five, (5),seconds. (Display will flash GC450 and theprogram version number).2. PRESS the "PROG" button twice to display"SYSTEM SETUP".3. PRESS and HOLD the "UP ARROW"( ↑ ) button forten, (10), seconds, "GAP CALIBRATION" will bedisplayed.4. PRESS the "MENU" button. The hold feature willdisplay “OFF”.5. HOLD the “RIGHT ARROW” (→) for ten, (10),seconds, the “OFF WILL FLASH”.6. PRESS the “UP ARROW” ( ↑ ) to change thesafety (ON/OFF).7. PRESS the “PROG” button to display “SYSTEMSETUP”.8. PRESS the “RIGHT ARROW” button (→) to returnto the normal OPERATING MODE.MENU ITEMSTo Add or Delete A Menu Item:1. PRESS and HOLD the “PROG” button for five, 5seconds. (Display will flash GC450 and theprogram version number).2. PRESS the “PROG” button one time to display“MENU ITEMS”.3. PRESS the “MENU” button to display the menuyou want to add/delete.4. PRESS the “UP ARROW” button ( ↑ ) to change“Y” or “N”.5. PRESS the “PROG” button to display “MENUITEMS”.6. PRESS the “RIGHT ARROW” button ( → ) toreturn to the normal OPERATING MODE.To Change Remove Time:1. PRESS and HOLD the “PROG” button for five, 5seconds. (Display will flash GC450 and theprogram version number).2. PRESS the “PROG” button one time to display“MENU ITEMS”.3. PRESS the “MENU” button to display the menuyou want to adjust.4. PRESS the “FUNCTION” button one time todisplay “REMOVE IN XXX”.5. PRESS the “UP ARROW” button ( ↑ ) to changethe value of the flashing digit.