1. Press and hold the power button for 1 second,the LCD screen will be activated after a beep sound.
2. Warm up" would display on the screen, and the numbers start to count down from 010 to 000.
3. After Warm Up is completed, it enters blow state, the display shows “blow”,and the numbers start to count down from 010 to 000. Blow at any time during the countdown, after the device detect the air, the buzzer will make a beep to stop blowing.
4. Display results: The test results would show for 10S and the device automatically shuts down. Power on again for the next test.
5. Read the test results from the display of the tester:
(1) If the alcohol concentration result is in the following display range, "Security" will appear on the display, and the green
warning light will be on.
0% BAC> Alcohol concentration <0.02% BAC or 0.2g/L
(2) If the alcohol concentration is below the display range of the result, the "Caution" will appear on the display screen and
accompanied by a beep, and the yellow warning light will be on.
0.02% BAC≥ Alcohol concentration <0.08% BAC or 0.8g/L
(3) If the alcohol concentration result is in the following display range, "Danger" will appear on the display screen and
accompanied by a warning tone, and the red warning light will be on.
Alcohol concentration ≥0.08% BAC or 0.8g/L
6. Press and hold the power button for 1 second, it would display the latest test result. Continue to press the power button, the display shows "01", which means the last test result,thencontinue to press the power button to display "02", which means the penultimate test result,....and so on, a maxium of 50 times test results can be recorded and displayed.And It would automatically power off after stopping operation for 10 seconds. Press the poweragain to start the next test.