Function: HCHO, TVOC, PM1 / 2.5 / 10
HCHO test range: 0-1.999mg / m3
PM1 / 2.5 / 10 test range: 0~999μg / m3
TVOC test range: 0~9.999 mg / m3
Display mode: LED
Power supply: Rechargeable lithium battery / 1200mAh
Input: 5.0V / 300mA
1. Formaldehyde calibration
Bring the instrument to a place such as a balcony where the outdoor air is fresh, and let the instrument’s detection port come into contact with the clean natural air. After leaving the instrument to stand for 5 to 10 minutes, press and hold the “Calibration” button for about 3 seconds to zero, and hear “click” and let go. , and then directly into the indoor testing.
[Note] The school zero and testing environment must avoid chemicals, perfumes, paints, air fresheners, cigarettes, alcohol, and other chemical pollutants.
Press and hold the “mute” button for 2 seconds. At this time, the buzzer will sound once and cancel the alarm. It means that when the formaldehyde>0.3mg / m3 or PM2.5>250, the buzzer will not alarm.
Press this button again for 2 seconds. At this time, the buzzer sounds 5 times, and the alarm reminder is restored. It means that when the formaldehyde>0.3mg / m3 or PM2.5>250, the buzzer sounds 6 alarms.
3. View PM1, PM10 concentration values
Click “Fn”, LED will display the PM1, PM10, PM2.5 concentration, automatically switch to the original display after 3 seconds.
4. Product charging
The product has a built-in lithium battery that uses USB charging and plugs the USB cable into the computer’s available USB port for charging. Charging time is about 4 hours. The indicator flashes when charging; the indicator lights up when the unit is full.