11
2.1
Touch screen display
1.
2.
3.
4.
5.
6.
7.
8.
9.
CO
2
button
TEMP/HUM button
SOUND button
Battery indicator
ON/OFF button
TIME button
RATE button
VOC button
PM button
2.2
Explanation of display buttons
Button
Function
Technical details
VOC
Checking the chemical content in the air
mg/m
3
PM
Checking the dust particles in the air
µ
g/m
3
CO
2
Checking the carbon dioxide in the air
ppm
TEMP/HUM
Checking the air temperature or humidity
°
C/
°
F / %
RATE
Checking the history
TIME
Updating the date/time
SCREEN
Turning off the screen
SOUND
Turning the sound ON or OFF
2.3
Explanation of display color
Term
Green color
Yellow color
Red color
VOC (mg/m
3
)
< 0.4
< 0.5
≥ 0.5
PM (
µ
g/m
3
)
< 10
< 15
≥ 15
CO
2
(ppm)
< 1000
< 1500
≥ 1500
2.4
Explanation of device color
Device color
Number of green
display color
Number of yellow
display color
Number of red
display color
Green
3
0
0
Green
2
1
0
Yellow
2
0
1
Yellow
1
2
0
Figure 3
