Analysis of commonly seen troubles
1. The carbon dioxide concentration data
in the air is not accurate.
Analysis 1: The concentration content of the
environment is not stable. At the time of measurement,
place the device in the same place
for a period of time.
Analysis 2: There are sundries, dirt at the sampling
window of carbon dioxide sensor. The air ow
ventilation window is blocked.
Analysis 3: the carbon dioxide sensor has deviation. It
needs to calibrate the equipment again.
2. Incorrect temperature and humidity
Analysis 1: Analysis of existence of impurities or dirt
or lth at the sampling window of the temperature and
humidity sensor.
Analysis 2: The ventilation window has been blocked
by something.
3. Date and time is not accurate
Analysis 1: caused by too low button battery level
inside the equipment.
4. Failure in power on
Analysis 1: The battery has no power or is damaged.
Use the USB socket for power supply. If power can be on,
and if there is change any change in the power check, it
indicates that there is no power in the battery. If there
is no change, the OK icon is displayed only indicating the
battery has been damaged.
Analysis 2: Battery +/- polarity is mounted reversely. It
is required to note that the non-protruding contact at
one end of the battery must be “-” polarity, and that the
protruding contact at one end must be “+” polarity. The
following gure can be referenced.
ENGLISH
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