3. Switch the temperature display between Fahrenheit and Celsius:
To change the temperature displayed to read Celsius instead of Fahrenheit (or Fahrenheit to Celsius):
I. Long press the Power button to switch it on.
II. Rapidly press the Power button two times in a row.
4. Alarm Silence/Mute/Unmute function: When any of the following AQI indexes (CO2, PM1.0, PM2.5, TVOC, and Humidity) reaches the Alarm Threshold,
the unit alarm will be sounding for ten seconds, while the alarm icon keeps blinking until the values are down to the Alarm-shutdown Threshold. (The
default alarm time is 10 seconds. You can reset it on APP.)
Or you can choose to
I. Press the Power button one time in a row to silence the alarm.
II. Long Press the 'ESC' button to mute the alarm. And the alarm logo will be disappeared on the screen.
III. Long Press the 'ESC' button to unmute the alarm. And the alarm indicator will be displayed on the screen.
5. Backlight adjustment:
I. Press the 'Set' button one time in a row for dim light mode.
II. Press the 'Set' button two times in a row for turning off the backlight.
6. Manual CO2 Calibration setting: Please place the unit in the ventilated environment during the manual calibration.
Rapidly press the 'ESC' button three times in a row to calibrate CO2 values. The CO2 Logo will blink on the screen during the manual calibration. It takes
about 3 minutes to complete the calibration. You can press the 'ESC' button to cancel the manual calibration.
7. Factory reset: Rapidly press the 'ESC' button five times in a row to resume the factory setting
I. The default CO2 Alarm Threshold is 1500ppm, and the Alarm-shutdown Threshold is 1000ppm.
The CO2 alarm setting range is 700 - 5000ppm.
II. The default TVOC Alarm Threshold is 6mg/m³, and the Alarm-shutdown Threshold is 3mg/m³.
The TVOC alarm setting range is 1-19.9mg/m³.
III. The default PM2.5 Alarm Threshold is 75ug/m³, and the Alarm-shutdown Threshold is 35ug/m³.
The PM2.5 alarm setting range is 10-200ug/m³.
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