GasTech GTF300-AQ User manual

Wall-mount type of Air Quality Detector
Model: GTF300-AQ and GTF300-VOC
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
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1
Installation and Wiring
1. Please read the Security Notifications in detail firstly.
2. The gas detector might install on wall or steel plate, please refer following drawing to make marking then drill
the holes. Do not use the gas detector as a drilling template to avoid fault.
3. Due to the space is very small that is impossible to use wrench. Therefore, to use female expansion bolts on the
wall or tap female screws on the steel plate and use external screw (male bolts) that can use the screw driver to
install the gas detector and solve spacing problems. M6 sizes of bolts have a good tolerance than W1/4.

Wall-mount type of Air Quality Detector
Model: GTF300-AQ and GTF300-VOC
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
2
4. Analog output
A recommend fuse is 0.2 A in the above.
5. Relay output
A recommend fuse is 0.2 A, the diode could be 1N4002 or 1N4004 in the above.
6. In order to meet waterproof, the wiring material and parts should be met the requirement also.
7. The wiring size is not less 0.5 mm^2 or 20 AWG. In the case of long-distance wiring, to apply bigger size or 30
VDC power is better.
8. The detector attached wiring connectors and shrink sleeves for the wiring. Due to spacing problems, do not use

Wall-mount type of Air Quality Detector
Model: GTF300-AQ and GTF300-VOC
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
3
electrical tape. For the connecting the wires, to solder them is better than using connectors that do not cut wires
while replace or reinstall to avoid shortage of wires length.
9. There are two 1/2” NPT female connectors which might use one normally. Please blind the other with tape seal.
Specifications
model GTF300-AQ-A
GTF300-VOC-A
GTF300-AQ-R
GTF300-VOC-R
type wall-mount
sensor Semiconductor
target GTF300-AQ：hydrogen, ethanol, isobutene etc.
GTF300-VOC：toluene, xylene, alcohol, ammonia, etc.
sampling method diffusion
measure range 1 ~ 200 CIAQ (Composite Index of Air Quality)
Refer GASTECH calibration curves, or make them by user
Resolution / accuracy / sampling time 1 CIAQ / continuity
alarm level high alarm resetable
analog output 4 ∼20 mA
max. load resistance 500 ohm N/A
relay output
rating N/A single pole normal open relay
with self-hold function
30VDC, 1A
buzzer / flash lamp available
backlight alphanumeric LCD available
construction dustproof and waterproof ( meet to IP65)
size 193 mm x 91 mm x 40 mm
net weight about 700 g
power supply 24 ∼30 VDC
power consumption about 3W
ambience temperature 0∼45 degree in Celsius
ambience humidity less 85％RH and non-condenser
packing size about 208 mm x 156 mm x 68 mm
gross weight about 1,100 g
(Specification maybe changed without notice)

Wall-mount type of Air Quality Detector
Model: GTF300-AQ and GTF300-VOC
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
MODEL…A03
GTF300-AQ-A
1. Power on display
After power on, the GTF300-AQ/VOC gas detector will display a series of messages, including welcome, model
no and CIAQ (Composite Index of Air Quality).
WELCOME
Show the model no. (Show it at power on only.)
GTF300-AQ-A and GTF300-VOC-A are a standard type with 4 ~ 20 mA analog output.
GTF300-AQ-R and GTF300-VOC-R are an optional type with relay output.
It’s warming up now, please wait. (Show it at power on only.)
GTF300-AQ/VOC can detect hydrocarbon compounds in the air, especially high sensitive
of hydrogen and transfer the CIAQ (Composite Index ofAir Quality) shown on the display.
CIAQ define fresh air and/or zero air is "1". According to concentration of hydrocarbon
compounds and hydrogen in the air, the more pollution exists the higher CIAQ will show.
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 CIAQ.
In the display, press NEXT key to enter next function.
In the display, press ADJ key, the buzzer and flash lamp will action. PressADJ key again,
they will stop. (The relay will make action in TESTALARM also, if detector model has
relay output.)
Press NEXT key to enter next function.
In the display, pressADJ 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; pressADJ key will decrease the setting limit.
Press NEXT key to enter next function.
In the display, press ADJ key, to reset the flash 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; pressADJ key will decrease the setting limit.
Press NEXT key to enter next function.
GASTECH
WELCOME
WARMING-UP
WAIT….
TESTALARM
Buzzer Limit
CIAQ 70 UP
Flash Limit
CIAQ 50 UP
CIAQ 1
CIAQ 1

Wall-mount type of Air Quality Detector
Model: GTF300-AQ and GTF300-VOC
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
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In the display, press ADJ key, to reset the relay action 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; pressADJ key will decrease the setting limit.
Note: this function is available in relay output model only.
Press NEXT key to enter next function.
In the display, press ADJ key, to reset the relay release 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; pressADJ key will decrease the setting limit.
Note: this function is available in relay output model only.
Press NEXT key to enter next function.
In the display, press ADJ key, to reset the humidity. 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.
In order to improve the accuracy of GTF300-AQ/VOC, please adjust humidity. The default
relative humidity of gas detector is 65%RH with adjustable range from 40%RH to 80%RH.
Press NEXT key to enter next function.
In the display, press UPDN and ADJ keys at same time, to enter calibration function.
Press NEXT key to jump calibration function and enter next function.
Warning! Except necessary, do not execute calibration. It is necessary to execute calibration
after power on 7 days.An error operating should loss accuracy.
In the display, user has to finish calibration.
Press ADJ key, to meet ambience CIAQ.In the fresh air, 1 is a recommended
value. But in some place, user might use a portable air quality detector to know
the ambience CIAQ. During the calibration the ambience CIAQ must be below
CIAQ 70. The last words of last row might show UP, press ADJ key will
increase the calibrating value. Press UPDN key, the word will change to DN;
press ADJ key will decrease the calibrating value.
Press NEXT key to finish calibration and enter next function.
In the display, press UPDN and ADJ keys at same time, to enter calibration function.
Before the calibration, user needs prepare an ampere meter and makes series into analog
current loop.
Press NEXT key to jump calibration function and enter next function.
Warning! Except necessary, do not execute calibration. It is necessary to execute calibration
after power on 24 hr. An error operating should loss accuracy.
Note: this function is available in analog output model only.
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; pressADJ key
will decrease the current output.
Press NEXT key to finish calibration of 4 mA and enter next function.
Calibration
CIAQ 1 UP
CIAQ
Calibration ?
<UPDN> + <ADJ>
Calibration
4 mA UP
Analog Outpu
t
Calibration ?
<UPDN> + <ADJ>
Relay A. L.
CIAQ 40 UP
Relay R. L.
CIAQ 20 UP
R. Humidity
65 % UP

Wall-mount type of Air Quality Detector
Model: GTF300-AQ and GTF300-VOC
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
6
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; pressADJ 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 pollution, 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 CIAQ display.
3. Alarm message
The concentration of gas is lower than buzzer low limits or higher than the buzzer high limit, the detector not only
has audible alarm but also provide clear alphanumeric alarm message for users.
It is the CIAQ high alarm display.
Press NEXT key, the buzzer will mute and the display will back to the normal display. If
the CIAQ is still higher than buzzer high limit, this message and audible alarm will come
again, that will disappear until the CIAQ is lower than the buzzer high limit.
4. Warning message
The GTF300-AQ/VOC gas detector may auto-off under low or high specified voltage. If the gas detector is
auto-off, it cannot work for detection. At some of case, the detector cannot work but will provide warning message
which reminds user to check the detector or its system.
Due to input voltage lower than specified, the detector cannot work.
Due to ambience temperature higher than specified, the detector cannot work.
5. Introduce CIAQ
GTF300-AQ/VOC can detect hydrocarbon compounds in the air, especially high sensitive of hydrogen and transfer the
CIAQ (Composite Index of Air Quality) shown on the display. CIAQ define that fresh air and/or zero air is "1".
According to concentration of hydrocarbon compounds and hydrogen in the air, the CIAQ is unlimited in theory.
Applicant in the living, when concentration of hydrocarbon compounds over some limit in the air, the sense of smell
will not have multiple effects, therefore CIAQ is designed in reasonable range in living. Please refer table as below:
High Alarm
CIA
Q
40
Life Time
29 DAYS
Temp. High
Calibration
20 mA UP
Power Low

Wall-mount type of Air Quality Detector
Model: GTF300-AQ and GTF300-VOC
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
7
Environment and Application CIAQ of GTF300-AQ/VOC
Fresh air and/or Zero air 1
Living room 1 - 8
Super market, Convenient store 10 - 20
Office 5 - 20
Road side or Bus stop of downtown 10 - 30
Public lavatory 10 - 40
Packing lot or Tunnel of automobile 10 - 40
Hospital or Sickroom 15 - 25
Smoking room of airport 30 - 90
Temple 30 - 50
Fart (close detecting) 50 - 100
Smelling breath
(Around blow 5 sec continuously) 20 - 35
Opening sewage 20 - 40
In above table except zero air CIAQ is absolutely "1", the other index may be different with user actual detecting, but the higher
CIAQ means the more pollutant or hydrocarbon compounds exist.
*Remark: This is a preliminary table, please tour GASTECH website www.portadetector.com to get the newest update information.
5.1 Odor detecting
The smell and sense of human is difficult to define, some of scent sense good but some persons might not accept the
smell. Although everybody has various different sense of smell that cannot define. Anyway, the smell depends on the
concentration of hydrocarbon compounds in the air.
5.2 Smoke detecting
GTF300-AQ/VOC is very sensitive of hydrogen, which generated from smoking or incomplete combustion. Therefore,
GTF300-AQ/VOC is suitable for air-conditioner management and non-smoking surveillance. Besides,
GTF300-AQ/VOC fire detective performance is superior to normal smoking detector. LPG and LNG gases leakage
detection GTF300-AQ/VOC is very sensitive and suitable to detect leakage of Natural Gas (Methane / City Gas) and
LPG (Propone).
5.3 Environmental index
CIAQ is objective index of environmental either living in most application. Due to smell and sense of human is
difficult to define but GTF300-AQ/VOC is non-subjective instrument that makes comparison and evaluation of
environmental.
5.4 Air-conditioner management and air cleaner
There are various factors such as smoking, odor of rotten food, using volatile solvent, using liquid eraser, bad
ventilating and so on, cause polluted air and high CIAQ. In order to improve air quality, we may use air cleaner. But
nobody knows what the air cleaner performance is? GTF300-AQ/VOC will help user to know the air quality and air
cleaner is effect or not.

Wall-mount type of Air Quality Detector
Model: GTF300-AQ and GTF300-VOC
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
8
5.5 Particular gases detecting
It is not easy to buy suitable gas detector for some of particular gases. In the case, GTF300-AQ/VOC might be a
substitute and solution. There are some notices that the concentration of target gas should be 10~1000 ppm, balance
gas should be air without interfered gases or exist few stables interfered gases. For example GTF300-AQ/VOC is more
sensitive and practical than other professional detector to detect exist less than 100 ppm of hydrogen. If the gas cannot
measure by diffusion or high concentration that out of CIAQ range, dilute detection is possible, put GTF300-AQ/VOC
in the bottle and takes the sample gases then inject bottle and read the CIAQ. Neither diffusion or dilute, Silicon
compounds gases is not suitable to use GTF300-AQ/VOC, e.g. SiH4.
5.6 The best partner of canary
People knew apply canary to detect unknown gas or toxic gas since long ago. Canary will die while exposed toxic gas
that warns people. Especially faced with unknown toxic gas, canary has the un-substitute status. The function of
GT(F)300 series gas detector is similar canary and sensitive most of hydrocarbon compounds in the air. Therefore,
GT(F)300 series gas detector is the best complement with canary while dispatch canary face unknown gas or toxic gas.
6. More application
GTF300-AQ/VOC detector has various applications; besides, above introduction others application may be develop by
user.
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GASTECH reserves the right to improve any product described in this operation manual without prior notice.