Step 1: Insert a mouthpiece into themouthpiece opening.
Step 2: Press the Power/Mode SelectorButton. You will hear a beep and the unit will start to count down from 15 onthe DISPLAY and say "Warm up". This warm-up process prepares the sensor.
Step 3: When the countdown approaches2, begin to inhale a deep breath.When the countdown reacheszero, you will hear a second beep indicating that you should blow into themouthpiece. Blow through the mouthpiece until you hear a beep. This may happenat any point during the 10 second countdown.
Step 4: Once the sensor has analyzedthe breath sample