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Test process:

1, boot: long press the middle button, device boot, "drop" prompt, screen full display.

2, preparation: After the boot, the device enters the preheating mode, the screen displays "10~00" countdown, the countdown is over, "drip" prompts to enter the blowing detection mode.

3. Detection: The screen displays "Blo" to detect blowing, and the waiting time is 60 seconds. When the gas is blown in, the device enters the blowing test mode.

4, test: The screen shows "-" running lamp and "Didi..." Blow continuously for 3 seconds. If the blow is interrupted, the screen displays "Err" twice and "drop" to indicate the blow error, then returns to "Blow detection" mode to redetect the blow.

5. Data: After successful blowing, the device enters the gas data analysis mode for 4 seconds, and the screen displays "----".

6, the result: the concentration unit is mg/l, when the test result <15mg/l, the green light is on, the equipment "drop" sound; When the test result is ≥15mg/l and <25mg/l, the yellow light is on, and the device has a continuous slow rhythm of "drip drip..." Hint; When the test result is ≥25mg/l, the red light is on, and the device has a continuous fast-paced "drip drip..." Hint; Display for 10 seconds, then the device automatically shuts down.

7, shutdown: long press the middle power button for 1 second, the device is shut down, the screen displays "OFF" twice and "drop" prompt shutdown.