Air Quality monitor

Instrument Introduction

 Digital temperature and humidity sensor.
 LCD display.
 Mute button: Turn the alarm sound on or off. In silent mode, the “ ” symbol is not displayed and there is no alarm sound. Default is to turn on sound.
 "+" button: When setting the alarm value, increase the value.
 Power button: Press and hold for 2 seconds to turn the power on or off. At power on, the number field counts down from 120.
 Temperature unit selection button: Convert between Celsius and Fahrenheit.
 "-" button: Decrease the value when setting the alarm value.
 Setting button: short press this button to set the “CO2→TVOC→HCHO” alarm value in sequence, and the original factory setting value will be displayed and flashing. Adjust the parameters via the "+" button and "-" button, the value will be automatically stored after 10 seconds.
Introduction to display content
 Alarm sound: Press the "mute button" to operate.
 CO2 measurement range: 350ppm 2000ppm
 TVOC measurement range: 0.000 mg/m³ 2.000 mg/m³
 HCHO measurement range: 0.000 mg/m³ 1.000 mg/m³
 Temperature display: Press the "temperature unit selection button" to operate. .
Measuring range: 0 90.0 Precision 0.1
32 194 Precision 0.1 above
100°F display integers)
 Environmental quality tips:
Excellent: The detected value is lower than the set value.
     Good: CO2 detection value is 50ppm higher than the set value;
TVOC detection value is 0.01 mg/m³ higher than the set value;
The detected value of HCHO is 0.03 mg/m³ higher than the set value.
Pollution: Buzzer fast audible alarm.
The CO2 detection value is 100ppm higher than the set value;
TVOC detection value is 0.02 mg/m³ higher than the set value;
The detected value of HCHO is 0.06 mg/m³ higher than the set value.
 When the battery power is too low, the battery frame will flash to remind the user to charge.
While charging, the characters in the battery frame will flash in sequence until the battery symbol is fully displayed when the battery is fully charged.
 Humidity display:
Measuring range: (0 99.0) %RH (Precision 0.1)
 Power
Built-in 3.7V lithium battery.
Please use a standard safe charger to charge.

Important Notes
a) Before use, please read the following detailed introduction carefully and use the instrument correctly according to the manual.
b) Do not disassemble the instrument or throw it into a fire.
c) Avoid operating the instrument in a strong wind environment.
d) Avoid vibration and drop.
e) If it is not used for a long time, the warm-up time for the first power-on will be longer.
f) Note: Do not allow liquids to flow inside the instrument.
??? Instrument Instructions
a) After the test, the power of the equipment must be turned off to avoid accidents.
b) Prevent the instrument from vibrating violently.
c) After the instrument is placed for a long time, odor gas will accumulate in the instrument, which will seriously affect the test results. In this case, the instrument must be placed in a cool and ventilated place, and then used for more than 1 hour. (no need to operate the instrument during ventilation)
d) Expired and defective products should be repaired in time.
e) Avoid impacting the sensor with gas higher than the measuring range, otherwise the sensor may be damaged, and man-made damage is not covered by the warranty.