A37
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400ppm
~
450ppm;
450ppm
700ppm;
~
700ppm
1000ppm;
~
1000ppm
2000ppm;
~
2000ppm
5000ppm;
~
5000ppm以上;
10
12
11
HOLD
MAX
MIN
AVG
TWA
STEL
P/N:110401106683X
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Carbon Dioxide Monitor
User Manual
I. Introduction
CO
2
is a naturally occurring gas that emitted at great levels by human
activity and it is one of several greenhouse gases in our atmosphere. CO
2
only accounts for 0.03% of the fresh air. If you breathe high concentration
CO , you may be at risk of carbon dioxide intoxication. Symptoms of
2
carbon dioxide toxicity include headache, irregular heartbeat, nausea,
unconsciousness, or even death.
A37 is a CO Monitor that measures CO concentration, temperature and
2
2
humidity. This monitor is widely used in homes, shopping malls, offices,
vehicles, stations etc.
Please read carefully and follow all warnings and precautions before using
the device.
II. Open box inspection
Open the box and take out the device. Please check whether the following
items are deficient or damaged and contact your supplier immediately if
they are.
A37 CO monitor -------------------- 1
Protective case ----------------------- 1
User manual -------------------------- 1
USB cable ----------------------------- 1
2
III. Safety information
1. Check the device and its accessories for any damage or anomaly before
use. Do not use the device if the cover is damaged, or has any other
malfunctions.
2. Please follow the operation instructions.
3. Please do not open the device case and modify the internal circuit.
4. Do not store or use this device in high temperature, high humidity ,
flammable, explosive and strong electromagnetic environments.
5. Charge the monitor when symbol is displayed.
6. Regularly use soft cloth and mild detergent to clean the case. Do not
use abradant or solvent.
7. A37 complies with CE standards.
8. This monitor has ABC (Automatic Baseline Correction) function. Do
not use this monitor in closed environment where CO concentration
2
remains relatively high.
9. Use specified adapter to charge the device. The adapter should comply
with UL/FCC safety standards.
①:
Case
②
LCD screen
③
USB port
④
Functional buttons
:
:
:
IV. Structure
V.Symbols
Indication
Indication
Audio alarm ON/OFF
STEL/TWA/MAX
/MIN/AVG modes
CO
2
calibration
Timing shutdown
Battery status
Exit calibration
CO concentration
2
CO
2
grading emoticon
concentration
Relative humidity
Date/time
Temperature
Data hold
No.
No.
VI. Operation instructions
1. Functional buttons
The following table shows the buttons functions in dif ferent modes.
Modes
OFF
Measure
Calibration
Functions
Long press: turn on/off the monitor
Long press: enter calibration mode
Short press: turn on/off the backlight
Short press to switch temperature unit ˚C/˚F
Long press to turn on/off audio alarm
Short press: cycle switch between
HOLD/MAX/MIN/AVG/TWA/STEL
Long press: reset to zero
Long press: calibrate the CO
2
concentration
(outdoor fresh air)
Short press: increase the value
Short press : next parameter
(double press to enter date/time calibration)
Long press: save
Short press: decrease the value
Short press: previous parameter
Long press: exit calibration
Buttons
2.Operations
CO
2
measurement
Long press to turn on the monitor. It takes 120s to stabilize CO
2
concentration.
concentration, ambient temperature, relative humidity
CO
2
will be displayed on the screen.
concentration value is refreshed
CO
2
every 3 seconds.
Note: if
>1000ppm, buzzer goes off with red backlight flashing. The
CO
2
audio alarm’s default setting is OFF, long press to turn on the audio
alarm.
1)Concentration grading emoticons
Data
Short press MODE to cycle switch between HOLD/MAX/MIN/AVG
/TWA/STEL values.
Indication
Data hold
Maximum value
Minimum value
Average value
Time weighted average
Short-term exposure limit
Symbol
