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Wall-mount type of Carbon Dioxide Detector
Calibration
20 mA UP
Life Time
29 DAYS
3. Alarm message
The concentration of gas is higher than the buzzer high limit, the detector not only has audible alarm but also
provide clear alphanumeric alarm message for users.
High Alarm
CO2 1368 ppm
Low Alarm
CO2 600 ppm
4. Warning message
The GTF220 carbon dioxide detector may auto-off under low or high specified voltage.
auto-off, it cannot work for detection.
which reminds user to check the detector or its system.
Power Low
Temp. High
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Model: GTF220
In the display, user has to finish calibration.
The last words of last row might show UP, press ADJ key will increase the
current output. Press UPDN key, the word will change to DN; press ADJ key
will decrease the current output.
Press NEXT key to finish calibration of 20 mA and enter next function.
In the display, user can read out the used life time of detector. Normally, the sensor of
detector has 1,000 days life time. It is necessary to renew the sensor beyond that.
Note 1: due to QC procedure, the used life time might be more than 1 day, but it should be
less than 30 days.
Note 2: Life time meter count up during power on only. If the detector is idle for a long
time, or used in an environment with high concentration of carbon dioxide, frequentative
power on and off, the lifetime will be shortened even the meter less than 1,000 days.
Press NEXT key; the display will back to the concentration of carbon dioxide.
If the concentration of carbon dioxide is higher than the buzzer high limit, the detector will
show this display. If the concentration of carbon dioxide is over 8,000 ppm will show
>8,000 ppm.
Press NEXT key, the buzzer will mute and the display will back to the concentration of
carbon dioxide. If the concentration of carbon dioxide is still higher than buzzer high limit,
this message and audible alarm will come again after 30 seconds that will disappear until
the concentration of carbon dioxide is lower than the buzzer high limit.
If the concentration of carbon dioxide is lower than the buzzer low limit, the detector will
show this display.
Press NEXT key, the buzzer will mute and the display will back to the concentration of
carbon dioxide. If the concentration of carbon dioxide is still lower than buzzer low limit,
this message and audible alarm will come again, that will disappear until the concentration
of carbon dioxide is higher than the buzzer low limit.
At some of case, the detector cannot work but will provide warning message
Due to input voltage lower than specified, the detector cannot work.
Due to ambience temperature higher than specified, the detector cannot work.
If the gas detector is
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