Wall-mount type of Carbon Dioxide Detector
Model: GTF220
GASTECH is a professional manufacturer in various gas detectors, carbon monoxide detector, carbon dioxide detector,
oxygen detector, odor detector, VOC detector, hydrogen sulfide detector and carbon monoxide detector. Welcome tour
our website
www.gastech.com.tw
4
M O D E L … A 0 3
G T F 2 2 0 - A
1. Power on display
After power on, the GTF220 carbon dioxide detector will display a series of messages, including welcome, model
no and carbon dioxide concentration in ppm.
WELCOME
Show the model no. (Show it at power on only.)
GTF220-A is a standard type with 4 ~ 20 mA analog output.
GTF220-R is an optional type with relay output.
It’s warming up now, please wait. (Show it at power on only.)
Show the concentration of carbon dioxide.
The measuring range would be 350 ppm to 8,000 ppm.
It may shows >8,000 ppm while
concentration of carbon dioxide is higher than above range.
2. Settings
The following operating procedure describes the settings. In the operation, press NEXT key or idle 3 minutes, the
display will back to the concentration of carbon dioxide.
In the display, press NEXT key to enter next function.
In the display, press ADJ key, the buzzer and flash lamp will action. Press ADJ key again,
they will stop.
(The relay will make action in TEST ALARM also, if detector model has
relay output.)
Press NEXT key to enter next function.
In the display, press ADJ key, to reset the buzzer high limit. The last words of last row
might show UP, press ADJ key will increase the setting limit. Press UPDN key, the word
will change to DN; press ADJ key will decrease the setting limit.
Press NEXT key to enter next function.
In the display, press ADJ key, to reset the buzzer low limit. The last words of last row might
show UP, press ADJ key will increase the setting limit. Press UPDN key, the word will
change to DN; press ADJ key will decrease the setting limit.
Press NEXT key to enter next function.
G A S T E C H
W E L C O M E
WARMING-UP
WAIT….
CO
2
364 ppm
TEST ALARM
Buzzer H. L.
3500 ppm UP
CO
2
364 ppm
Buzzer L. L.
350 ppm UP
