GASTRON G-Finder GFS-100 Series User manual

G-Finder Single O
2
/ CO / H
2
S Portable Single Gas Detector
GT-06519031501 P GE 1 of 6 Rev 0.3(2019.06.21)
G-Finder Single
Instruction Manual
G-Finder Single is a personal safety device
designed for monitoring the atmosphere for
potentially hazardous level of a gas enrichment or
deficiency in diffusion mode using one
electrochemical sensor for one of three gases:
Oxygen (O
2
), arbon Monoxide ( O) or Hydrogen
Sulfide (H2S) by selecting at order. Power is
provided by one, non-user replaceable, lithium-
thionyl chloride primary cell. Readings are
displayed on L D and the device has audible,
visual, and vibrating alarms when set, user-
configurable conditions are exceeded. It is your
responsibility to respond appropriately to the
alarms. G-Finder Single has no facilities for
connection of external electrical circuits. G-Finder
Single has IR communications for changing the
alarm set point, the calibration range and etc. The
IR communications shall only be used in safe area.
WARNING
1) G-Finder Single is designed for single use and
comes with a non-field replaceable lithium-ion
battery, filter and sensor already installed and
ready for use.
2) Do not attempt replacement or substitution of
components. eplacement or Substitution of
components may impair Intrinsic Safety and
will void the warranty of the product.
3) The electrical, electronic and battery elements
of this product must not be disposed of via
municipal waste streams; they should be
disposed of by a qualified recycler or
hazardous materials handler. Correct disposal
will contribute to recycling of materials and
prevent negative consequences for the
environment.
4) It is recommended performing a bump test
prior to G-Finder Single use every day to
confirm sensor response and alarm activation
by exposing the detector to a concentration of
target gas that exceeds the low alarm set
point.
5) In case of G-Finder Single O2, for optimal
performance, periodically calibrate zero for
the sensor.
6) For all gas type of G-Finder Single, always
proceed bump test and calibration at room
temperature and in a fresh air environment
(20.9% v/v O2) that is free of hazardous gas.
7) The display window may have potential
electrostatic charging hazard. Therefore, do
not rub or wipe the display window to avoid
the build up of electrostatic charge on the
surface. Additionally, the display window shall
only be cleaned with a damp cloth.
CAUTION
1) Activate G-Finder Single before the activation
date on the package.
2) In order to maintain normal operation of G-
Finder Single, keep the gas sensor grill from
clogging and keep the gas sensor, LED and
buzzer hole surfaces free from dust and dirt.
Clean the exterior with a soft and damp cloth.
3) When using G-Finder Single, sudden change
in the temperature may cause change in the
detected gas concentration value suddenly.
Using in a stable temperature environment is
recommended for more accurate detection.
4) G-Finder Single is a gas detector, not a
measurement device.
5) Portable safety gas detectors are life safety
devices. Accuracy of ambient gas reading is
dependent upon factors such as accuracy of
the calibration gas standard used for
calibration and frequency of calibration.
1. Specification
Item Description
Ex marking ATEX : II 1 G Ex ia IIC T4 Ga
IECEx / KCs / NEPSI : Ex ia IIC T4 Ga
Approvals
IE Ex : IE Ex KTL 19.0018
K s : 19-KA2BO-0360
ATEX : DEKRA 19ATEX0080
NEPSI : GYJ19.1195X
Dimensions 87x50x41 mm (Alligator clip included)

G-Finder Single O
2
/ CO / H
2
S Portable Single Gas Detector
GT-06519031501 P GE 2 of 6 Rev 0.3(2019.06.21)
Weight 103 g (Alligator clip included)
Temperature -20° ~ 50 °
Humidity 5 ~ 95 % RH
IP IP 67
Sensor type O
2
or CO or H
2
S – electrochemical cell
Alarms Visual, vibrating, audible (min. 95dB)
Display Liquid rystal Display (L D)
Battery Primary lithium-thionyl chloride (Li-SOCl2)
Event Log Last 128 events.
Newer events replace older events.
Battery Life 24 months of operation/
2 minutes of alarm per day.
Warranty Full 2 years
2. Each part for G-Finder Sing e
3. LCD Icons Description
Icon Description
Low alarm and high alarm.
These signs are displayed when gas
concentration exceeds alarm
setpoints.
O, H
2
S models only.
Toxic gas concentration is
measured in parts per million.
O
2
model only.
Oxygen concentration is measured
as percent by volume.
Time Indicator.
(Remaining product life with 00M /
00d / 00h display, 00 means
remaining months / days / hours)
When this symbol is displays, press
one time or hold the pushbutton
until the symbol disappears
Alarm event indicator. This icon is
displayed when an alarm event has
occurred within the past 10 hours.
Low battery warning indicator.
End of operating life
warning indicator.
alibration reminder. This icon is
displayed when a sensor
calibration is due. / indicates a
failed calibration.
Bump test reminder. If the detector
is configured to display a bump
test reminder, this icon is displayed
when a bump test is due. /
indicates a failed bump test.

G-Finder Single O
2
/ CO / H
2
S Portable Single Gas Detector
GT-06519031501 P GE 3 of 6 Rev 0.3(2019.06.21)
4. Activate a New Detector
1) Move to a normal atmosphere (20.9% v/v O2)
that is free of hazardous gas.
2) Press and hold the pushbutton until 5 second
countdown is displayed, then continue to hold
until the countdown is completed to activate
G-Finder Single.
3) When the countdown is completed, the L D,
LEDs, vibration, and beep turn on and then
turn off.
4) The alarm setpoints are displayed and the
sensor stabilization countdown is displayed.
The time required to stabilize varies
depending on sensor type. When the
countdown reaches 0, the activation is
completed.
※ In case of G-Finder Single O
2
, when the
countdown reaches 0, the zero calibration
is performed automatically and after the
zero calibration, the activation is
completed.
5) The detector is in normal operating mode
when the gas type and concentration are
displayed.
5. Norma Operating Mode
Normal Display
1) When the detector is in normal operating
mode, the type of gas detected is permanently
displayed. The detected concentration of the
gas is displayed until it is disrupted by a
pushbutton action, gas alarm, or error event.
If you want to see the status information
about the detector, please press the
pushbutton once.
Firmware Version Display
2) The display information on the L D is changed
to the current firmware version of the
detector from the normal display by pressing
the button once. The number before the
underline ’_’ means major number of the
firmware version, and the number after the
underline means minor number. In other word,
“0_02” indicates the firmware number is ‘0.02’.
Remaining Product Life Display
3) The display information on the L D is changed
to the remaining product life from the current
firmware version of the detector by pressing
the button once. The unit of the remaining life
will be changed automatically refer to the
remaining life scale; “24M” ~ “1M”, “30d” ~
“1d”, “24h” ~ “1h”.
Low Alarm Set Value Display
4) The display information on the L D is changed
to the low alarm set value from the remaining
product life by pressing the button once.
High Alarm Set Value Display
5) The display information on the L D is changed
to the high alarm set value from the low alarm
set value by pressing the button once.
6) The display information on the L D is changed
to the normal display from the high alarm set
value by pressing the button once if there is
not any alarm event occurred within the past
10 hours.
Elapsed Time Display
Alarm Value Occurred Display
7) Or if there is any alarm event occurred within
the past 10 hours, the display information on
the L D is changed to elapsed time since the
alarm occurred from the high alarm set value
by pressing the button once, and then it is

G-Finder Single O
2
/ CO / H
2
S Portable Single Gas Detector
GT-06519031501 P GE 4 of 6 Rev 0.3(2019.06.21)
changed to the alarm value occurred by
pressing the button once again, and it is
changed to the normal display by pressing the
button once again.
6. A arms
An alarm is initiated when the sensor is exposed
to a gas concentration that exceeds alarm
setpoints. The alarm has two types; a low alarm
and a high alarm.
The alarm persists until the gas concentration
returns to an acceptable range. Battery life
decreases rapidly when the detector is in alarm
condition.
For G-Finder Single O
2
type, a low alarm occurs
when the measured concentration value is lower
than the low alarm setting value, while a high
alarm occurs when the measured concentration
value is higher than the high alarm setting value.
The following alarm settings are default for each
detector gas type.
Gas Type Low Alarm High Alarm
O
2
19.5% v/v O
2
23.5% v/v O
2
CO 35 ppm 200 ppm
H
2
S 10.0 ppm 15.0 ppm
When the alarm occurs, LEDs flash, vibration and
beep sounds occur and display will be changed as
below for example.
7. Bump Test
1) Press the button twice at the normal
operating mode in succession to get into the
menu, it shows "bUMP" on the screen.
2) Press and hold the button until a 3 second
countdown is displayed, then continue to hold
until the countdown is completed to perform
the bump test.
3)
Then the gas Injection display, the low alarm
setpoint display, and the high alarm setpoint
display occur cross and the detector waits for
injection of gas which causes an alarm.
4)
If the detector detects the gas concentration
for the bump test, the bump test process is
performed automatically. The result will be
displayed on the screen at the end of the test.
If an alarm occurs during the bump test, the
test is succeeded, otherwise the test is failed.
8. Zero the Sensor
In case of G-Finder Single O
2
, over time and
through use, the sensor baseline at zero exposure
may drift from the manufacturer’s baseline.
For optimal performance of O2 models, it is
recommended to zero the O2 sensor at least once
in a month at the condition of room temperature
and in a fresh air environment (20.9% v/v O2)
that is free of hazardous gas.
The user will be noted by the display of the
calibration reminder icon when the sensor
calibration is due. If the icon is showing please
zero the sensor as instructed below:
** For all gas types, we recommend to zero the
sensor periodically.
1) Move to a normal atmosphere (20.9% v/v O2)
that is free of hazardous gas.
2) Press the button twice at the normal
operating mode in succession to get into the
menu, "bUMP" will be displayed on the screen.
3) "ZErO" is displayed on the screen by pressing
the button once, then press and hold the
button until a 3 second countdown is
displayed. ontinue to hold until the
countdown is completed to calibrate zero.
4) Wait until the zeroing process is completed.
5) When the zeroing process is completed,
"PASS" or "FAIL" appears.
6) After displaying the result, "ZErO" is displayed
on the screen again automatically.
7) If "FAIL" appears, repeat the zeroing process
according to above procedure.
8)
If the zeroing process fails again, please
contact our service center.

G-Finder Single O
2
/ CO / H
2
S Portable Single Gas Detector
GT-06519031501 P GE 5 of 6 Rev 0.3(2019.06.21)
9) To calibrate gas, press the button once, and
"SPAn" will be displayed on the screen.
ontinue calibrating according to the
" alibration Gas" section.
10) Or to exit the menu, press the button
repeatedly to go back to normal operating
mode.
9. Gas Ca ibration
For more optimal performance of G-Finder Single,
gas calibration may be needed. To calibrate the
detector, we recommend gas calibration after
doing zero calibration at room temperature and in
a fresh air environment (20.9% v/v O2) that is
free of hazardous gas.
By default, G-Finder Single is configured to use
the following calibration gas mixtures:
Gas Type Standard Calibration Gas Concentration
O
2
18.0 % v/v O
2
CO 150 ppm (balance N
2
)
H
2
S 25 ppm (balance N
2
)
1) Move to a normal atmosphere (20.9% v/v O2)
that is free of hazardous gas.
2) Press the button twice at the normal
operating mode in succession to get into the
menu. "bUMP" will be displayed on the screen.
3) "ZErO" will be displayed on the screen by
pressing the button once, by pressing the
button again, "SPAn" will be displayed on the
screen.
4) Press and hold the button until a 3 second
countdown is displayed. ontinue to hold
until the countdown is completed.
5) The gas injection display and the standard
calibration gas concentration display occur
cross and the detector waits for injection of
calibration gas.
6) If the detector detects the gas concentration
for the gas calibration, the gas calibration
process will be performed automatically.
7) When the gas calibration process is completed,
"PASS" or "FAIL" appears.
8) After displaying the result, "SPAn" will be
displayed on the screen again automatically.
9) If "FAIL" appeared, repeat the gas calibration
process according to above procedure.
10) If the gas calibration fails again, please
contact our service center.
11) Or to exit the menu, press the button
repeatedly to go back to normal operating
mode.
10. Detection Range
Detection ranges for each gas type are noted in
the table below.
Gas Type Detection ange
O
2
0 to 25.0% Vol
with 0.1 increments
CO 0 to 300 ppm
with 1 increment
H
2
S 0 to 100.0 ppm
with 0.1 increments
11. Manufacturer Information
If there are any problems with our products,
please contact us at the address below.
1) Address :
Gastron o., Ltd. 23, Gunpocheomdansaneop
1-ro, Gunpo-si, Gyeonggi-do, Korea
2) Tel : [phone]
3) Fax : [phone]
4) URL : www.gastron.com
5) e-mail : [e-mail]

G-Finder Single O
2
/ CO / H
2
S Portable Single Gas Detector
GT-06519031501 P GE 6 of 6 Rev 0.3(2019.06.21)
12. Certifications and
Approva s
1) The certification marking and certificate
numbers are in the table below.
Ex
marking
ATEX : II 1 G Ex ia IIC T4 Ga
IECEx / KCs / NEPSI : Ex ia IIC T4 Ga
Approvals
IECEx : IECEx KTL 19.0018
KCs : 19-KA2BO-0360
ATEX : DEK A 19ATEX0080
NEPSI : GYJ19.1195X
2) The product is in conformity with the
following standards:
IECEx : IEC 60079-0:2011, IEC 60079-11:2011
KCs : Announcement No. 2019-15 of Ministry
of Employment and Labor
ATEX : EN 60079-0:2012, EN 60079-11:2012
NEPSI : GB 3836.1-2010, GB 3836.4-2010,
GB 3836.20-2010
3) The product may be used in zones 0, 1 & 2
with flammable gases and vapors with
apparatus groups IIC and with temperature
classes T1, T2, T3, T4.
4) The product is only certified for use in ambient
temperatures in the range -20℃ ≤ Ta ≤ +50℃
and should not be used outside this range.
5) With regard to explosion safety, it is not
necessary to check for correct operation.
6) The product contains no user-replaceable
parts and is not intended to be repaired by the
user. epair of the equipment is to be carried
out by the manufacturer, or their approved
agents, in accordance with the applicable
code of practice.
7) The certificate label is described as below.
13. Ordering Information
P lease put an order according to model code
description below.
 GFS-100-X-Y
- GFS-100 : standard model name
- X : Gas type
(O2 : O
2
gas, CO : CO gas, H2S : H
2
S gas)
- *Y : Housing body color
(OG : orange(default), YE : yellow, GN :
green, VT : violet, etc.)
 *Y : Option which does not affect
intrinsic safety. This option code is
needed at the order if you want some
color different with default for the
housing body. This option code will
be not printed on the label.
14. Revision History
EV. CONTENTS DATE
0.1 Initial Document 15 M R
2019
0.2
Revised by
Initial Certification udit
29 M Y
2019
0.3
Revised by
Additional Certificate Updated
21 JUN
2019