JD-3002 Carbon Dioxide Comprehensive Air Quality Temperature Humidity Detector(480g)

Instrument instructions:1. After the test, the power of the equipment must be turned off to avoid accidents2. Prevent the instrument from violent vibration3. After placing the instrument for a long time, the 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 operation is required during the ventilation process instrument)4. The expired and defective products should be repaired in time.5. Avoid shocking the sensor with gas higher than the measurement range, otherwise it may damage the sensor, and man-made damage is not covered by the warrantyInstrument introduction:1. Digital temperature and humidity sensor2. LCD display3. Mute button: Turn on or off the alarm sound. In the silent mode, the " " symbol is not displayed and there is no alarm sound. The default is to turn on the sound4. "+" button: When setting the alarm value, increase the value.5. Power button: long press for 2 seconds to turn on or off the power, when power on, the number field counts down from 1206. Temperature unit selection button: Celsius and Fahrenheit conversion7. "-" button: When setting the alarm value, decrease the value8. Setting button: Short press this button to set the alarm value of "CO2→TVOC→HCHO" in sequence, the original factory setting value will be displayed and flashing, and the parameter will be adjusted by the "+" button and "-" button, and the value will be displayed after 10 seconds. automatic storage9. Power supply: DC5V built-in 1800mAh lithium battery10. Dimensions: 195x95x35mm11. Toolbox packaging weight: 480 gramsDisplay content introduction:1. Alarm sound: press the "mute button" to operate2. CO2 measurement range: 350ppm～2000ppm3. TVOC measuring range: 0.000 mg/m3～2.000 mg/m34. HCHO measuring range: 0.000 mg/m3～1.000 mg/m35. Temperature display: press the "temperature unit selection button" to operate6. Measuring range: 0-90.0 degrees Celsius, 32-194 degrees Fahrenheit7. Environmental quality reminder: excellent, the detection value is lower than the set value; good, the CO2 detection value is 50ppm higher than the set value8. The TVOC detection value is 0.01 mg/m3 higher than the set value9. The detected value of HCHO is 0.03 mg/m3 higher than the set value10. Pollution: Buzzer fast sound alarm11. The detected value of CO2 is 100ppm higher than the set value12. The TVOC detection value is 0.02 mg/m3 higher than the set value13. The detected value of HCHO is 0.06 mg/m3 higher than the set value14. When the battery power is too low, the battery box will flash to remind the user to charge15. When charging, the characters in the battery frame will flash in sequence until the battery symbol is fully displayed when the battery is fully charged16. Humidity measurement range: 0～99.0RHimportant hint:1. Before use, please read the following detailed introduction carefully, and use the instrument correctly according to the manual2. Do not disassemble the instrument or throw it into fire3. Avoid operating the instrument in a strong wind environment4. Avoid shock and drop5. If it is not used for a long time, the warm-up time for the power-on will be longer6. Note: Do not let liquid flow into the instrument