Perfect Prime CO2000 - Product Features and Functions; Power Button Function; Temperature Unit and Navigation Buttons; Alarm and Left Button Function

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VI. Product Features and Functions
Button Function :
1. Power : ON / OFF
2. °C /°F and UP :
a. Toggle between °C and °F display.
b. During settings it will act as UP/Increase the digit
value button.
3. ALM and LEFT :
a. At Main Display Mode: turn ON/OFF CO2
concentration alarm function.
b. During settings it will act as LEFT key to select.
4. Backlight and RIGHT :
a. At Main Display Mode: turn ON/OFF display
backlight
b. During settings it act as RIGHT key to select.
5. REC and DOWN :
a. After data log is set to Manual, press this key to
start measurement and log.