OPERATION
1. Power on and Measure:
-Connect the USB-C cable to a PC or 5VDC wall adapter or power bank to power on the device.
-After power on, the LED count down for 10 seconds during warm-up.
-The device will start to measure PM2.5, CO
2
concentration, ambient temperature and relative humidity
after warm-up.
-Suggest to power on for at least 30 minutes before using the logging function.
2. Light bar
:
Besides the value display, this meter is also equipped with programmable light bar color feature.
There are 3 different light bar color for PM2.5 and CO
2
: Green, Yellow and Red. The color auto switches
according to the measured value. Yellow color will be skipped if red light setting is identical to yellow.
3. Buzzer & How to turn off buzzer:
Buzzer function is default OFF in case of using in quiet places. It is required to activate buzzer function
in setting mode while audible alarm is needed. While buzzer is activated and measured CO
2
or PM2.5 is
over alarm threshold, buzzer sounds once a second till pressing “
MUTE
” key to stop.
4. Health Index:
Long term PM2.5 value brings higher impact to human health. The health index here provides you a quick
indication to know the average PM2.5 level of past 24 hours. This index table is defined by USA EPA.
Health index level
AQI category
3
Breakpoints (ug/m , 24H average)
1
2
3
4
5
6
Good
Moderate
Unhealthy for sensitive groups
Unhealthy
Very Unhealthy
Hazardous
0.0~12.0
12.1~35.4
35.5~55.4
55.5~150.4
150.5~250.4
250.5~350.4
350.5~500
7
Hazardous
5. Setting:
Long pressing
"SET"
key to enter the settings. And then press
"SET"
key to select setting modes in
sequence: bL (Brightness of light bar), ALC 2.0 (CO
2
Alarm color), ALC 3.0 (PM2.5 Alarm color), Unit
(temperature unit), Buzzer, Pressure compensation and ABC (auto background calibration).
Press
" + "
key to adjust the parameters.
*Note: During the setting process, the device will return to the main screen after 25 sec of idle
time.
5.1 Brightness of light bar (bLt): The brightness of light bar is adjustable. From off to strong is 0 to 10,
0 is turned off and 10 is the strongest. Default as 6. Press
“+”
to adjust the brightness of light bar to fit
your need. Though light bar might be set to off, it will still blink at weakest level 1 brightness while
measured CO
2
or PM2.5 is higher than alarm threshold.
5.2 Alarm(ALC, 2.0 &2.1): For CO
2
, green turns into yellow, adjustable from 700ppm to 3,000ppm,
default 800. Yellow turns into red, adjustable from 700 to 3000ppm, default 1000. Red should be larger
than yellow, yellow color will be skipped if red light setting is intentionally identical to yellow. Interval is
100ppm. This red light threshold is related to buzzer alarm trigger and red light bar trigger.
To adjust alarm threshold value, Press
“+”
key
.
3
From
turns into
Green
Yellow
Yellow
turns into
flashing Red
PM2.5
CO
2
Adjustable from 700 to 3000
(default as 800)
Adjustable from 700 to 3000
(default as 1000)
Adjustable from 10 to 100
(default as 35)
Adjustable from 10 to 100
(default as 54)
www.ete.co.th
