GASTRON GTD-2000Ex User manual

Headquarters / Engineering research laboratory :
23 Gunpo Advance d Industry 1-ro(Bugok-dong), Gunpo-si, Gyeonggi-do
Tel [phone] Fax [phone]
Yeongnam business office / Plant :
55 Gonghangap-gil 85beon-gil, Gangseogu, Busan Metropolitan City
Tel [phone] Fax [phone]
E-mail : [email protected]
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GTD-2000Ex
Instruction Manual
Read in detail for correct use.

When abnormalities occur after purchasing the product,
please contact the following address.
·Address : 23 Gunpo Advanced Industry 1-ro, Gunpo-si, Gyeonggi-do
·Tel : [phone]
·Fax : [phone]
·URL : www.gastron.com
·e-mail : [email protected]
The present product and the product manual can be changed without advance notice for performance improvement and
use convenience of the product.
* KOSHA GUIDE : P-135/6-2018
Calibration should be executed periodically at periods required by the manufacturer
■ For accurate operation of Gas detector, check up and calibrate for more than once in every 6 months.
( * See No. 13 of KOSHA GUIDE : P-135-2013 / 8.3 paragraph on qualification and calibration)
■ For accurate operation of Gas detector, checkup and calibration with calibration gas before measurement
is recommended.
■ When not calibrated, it may cause malfunction of the equipment due to problems resulting from Sensor aging.
■ When the present instrument should be dismantled, those with professional skills for Gas detector should
conduct the operation.
■ For power supply cable, wire specifications should be determined by referring to the item of "Length of
installed cable".
■ For the contents on checkup and calibration of Gas detector, please use our company's engineering
department , e-mail, or web site.
Gas & Flame
Detection System
GTD-2000Ex
Instruction Manual
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02_03
We sincerely thank you for purchasing the product of Gastron Co. Ltd.
Our Gastron Co.Ltd. is a company specialized in Gas detector and Gas Monitoring System, being
recognized by many consumers due to the best quality and use convenience. We always enable you
consumers to find desired products nearby and are ceaselessly studying and striving for development
of Gas detectors satisfying customers. From now on, solve all anguishes concerning Gas detector with
the products of Gastron Co. Ltd, We Gastron Co. will take a responsibility and give you satisfaction.
In the present instruction manual, operation method for Gas detector as well as simple methods for
maintenance and repair, etc. are recorded If you read it in detail and keep it well, for reference when
you have questions, then it will give you much help.
Greetings

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04_05
ContentsContents
GTD-2000Ex
Instruction Manual
7.2.2. Span Calibration ······································································· 22
7.3. ALARM Mode ················································································ 23
8. Troubleshooting ··················································································· 25
8.1. Fault List ····················································································· 25
8.2. Recovery List ················································································ 25
9. Outline drawing and Dimensions ·································································· 26
9.1. Standard Type ··············································································· 26
9.2. Upon coupling of warning light ································································· 27
9.3. Upon coupling of Raincover ··································································· 28
10. Notes before installation ··········································································· 29
10.1. Selection of installation place(Data from occupational safety and health regulations) ················· 29
10.2. Selection of installation place(Data from safety management regulations for high-pressure gas) ····· 29
10.3. Notes upon installation ········································································ 29
11. Revision record ···················································································· 31
1. Overview ·························································································· 6
2. Structure ·························································································· 6
3. Specification ······················································································· 7
3.1. Basic Specifications ·········································································· 7
3.2. Mechanical Specifications ····································································· 7
3.3. Electrical Specifications (Standard Type) ························································ 8
3.4. Environmental Specifications ··································································· 8
4. Name and description of each part ································································ 9
4.1. Components ················································································· 9
5. Installation ························································································· 11
5.1. Separation of Housing Cover ·································································· 11
5.2. Configuration of Main PCB ····································································· 12
5.2.1. Wire connection method of driving method for 4~20mA Source ···························· 14
5.2.2. Wire connection method of driving method for 4~20mA Sink ······························ 14
5.2.3. Wire connection method of driving method for 4~20mA 3Wire Sink ························· 15
5.3. Length of installed cable ······································································· 15
6. Operation Flow for detector ······································································· 17
6.1. Initial operation state (Power On) ······························································· 17
6.2. Gas Measuring Mode ········································································· 17
6.3. Operation Flow ··············································································· 18
6.4. Menu Configuration Table ····································································· 19
7. System Mode ······················································································ 20
7.1. PROGRAM MODE ············································································· 20
7.2. CALIBRATION MODE ·········································································· 21
7.2.1. Zero Calibration ········································································ 21

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06_07
3. Specications
GTD-2000Ex flammable Gas detector has been developed to prevent accidents beforehand by detecting various
leaked gases generated in industry fields such as plants producing or using flammable gas, gas storage place,
manufacturing processes, etc.
GTD-2000Ex flammable Gas detector is installed in areas with a risk of gas leakage to display measured values with
LCD, OLED installed in the detector by continuous detection of gas leakage, providing DC 4~20mA standard output.
Also, DC 4~20mA standard output can connect up to the maximum of 2500m (upon using CVVS or CVVSB 1.5sq↑
Shield Cable) in transmission distance of output signals of detector and receiving unit.
The present GTD-2000Ex flammable Gas detector should be used at altitude of less than 1000M above sea level.
GTD-2000Ex body is made of aluminum alloy material in a structure of complete pressure-resistant explosion-proof
type(Ex d IIC T6),with the gas sensor module being composed of stainless steel material. It can be installed in the areas
with a risk of leakage and explosion of all flammable gases, displaying leakage situation of gas at the installed field by
embedding LCD, OLED in the detection unit. Inside structure is comprised of display unit displaying measured values,
terminal unit for outputting measured values (DC4- 20mA) to outside and one PCB. Outside structure is comprised of
detector unit for detection of gas leakage and Cable lead-in unit. Maintenance and repair operations are convenient
since calibration operation can be conducted outside of the Gas detector by using Magnet-bar outside of the detector
unit body.
3.1. Basic Specifications
3.2. Mechanical Specifications
[Figure 1. GTD-2000Ex Overview]
ITEMS SPECIFICATION
Measuring Type Diffusion type
Measuring Value Display Local Digital LCD or OLED Display
Measuring Method
- Contact combustion type (Catalytic Cell)
- Thermal conduction type (Thermal Conductivity Cell)
- Hot wire-type semiconductor (Heated-semiconductor Cell)
Detectible Gas Flammable gas
Measuring Range 0~100% LEL
Accuracy ≤ ±3% / Full Range
Zero Drift ≤ 2% / Full Range
Response Time 90% of full Scale in less than 15 sec
Certification (Approvals Classification)
KCs: Ex d llC T6,T5,T4, IP65
ATEX/IECEX: II 2 G Ex d IIC Gb T4~T6
SIL2, MED, ABS, DNV
Basic Interface Analog 4-20mA current interface
HART Interface HART REV7 (Option)
Option
HART Board
GTL-100 warning light
Rain Cover
Warranty Body (Transmitter) 2Year
Sensor 1Year
ITEMS SPECIFICATION
Explosion Proof type Pressure-resistant explosion-proof enclosure
Dimension 136(W) × 166(H) × 110 (D) mm
Weight including Sensor App. 1.5kg
Mounting type Wall mount
Mounting Holes Ø 7 ±0.1
Cable inlet 3/4" PF ( 1/2" or 3/4" NPT )
Body material Body (Transmitter)
aluminum alloy
Sensor Stainless Steel (STS316)
Infrared Gas
Sensor Module
(GSA860EX)
Main Board
(Transmitter)
+24V DC
4-20mA Analog
Signal Output
Display Board
(User Interface)
Transmitter enclosure
(GDH-1000)
Safety Power Supply Unit
(24VDC)
Safety Controller
(PLC or DCS)
GTD-2000Ex Gas Detector
Hazardous Area (Filed) Safe Area
2. Structure
1. Overview
GTD-2000Ex
Instruction Manual

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08_09
4. Name and description of each part
4.1. Components3.3. Electrical Specifications (Standard Type)
ITEMS SPECIFICATION
Input Voltage(Standard)
※ Customer supplied PSU must meet
requirements IEC1010-1 and CE
Marking requirements.
Absolute min:
Nominal:
Absolute max:
Ripple maximum allowed:
18V
24V
31V
1V pk-pk
Wattage Max. wattage:
Max. current:
4.8W @+24 VDC
200mA @+24 VDC
Analog output Current
0-20mA(500 ohms max load)
All readings ± 0.2mA
Measured-value signal:
4mA(Zero) to 20mA(Full Scale)
Fault:
0-100% LEL:
100-109%LEL:
Over 110% LEL:
Maintenance:
0mA
4mA - 20mA
20mA - 21.4 mA
22mA
3mA
Analog output current ripple & noise max ±20uA
Wiring requirement Power CVVS or CVVSB with shield
Analog CVVS or CVVSB with shield
Signal transmission distance
(Cable Connection Length) Analog 2500m
EMC Protection: Complies with EN50270
NO NAME DESCRIPTIONS
1Housing Body
Protect PCB Board embedded inside sensor and housing from environment change and impact of outside.
2Housing Cover Assembled to Detector Housing Body, with Top face made of circular glass, allowing the values
displayed in LCD to be viewed.
3Main PCB Amplify minute outputs produced from Sensor Element and convert the as standard output of
4-20mA.DC, and transmit Data to Display unit.
4Display PCB Display Data(measured values) sent from Main /Terminal(Transmitter) PCB in LCD, and display
power supply state by Power Lamp
5Power/Signal Terminal CN8 is configured with power supply of DC 24V and Connection terminal for standard output of
DC 4~20mA (VISO, +24V, mA, GND, ETH)
6Sensor Terminal CN4 is the Sensor Connection Terminal.
7Power LED Lamp always turned ON when power is supplied
8Function Key
Used when having the function setting mode entered into by using Magnet-Bar for contact of more
than 2sec in gas measuring mode, or when the data changed in function setting mode is saved.
3.4. Environmental Specifications
ITEMS SPECIFICATION
Operation Temperature Body -40 to 80 ℃
Sensor See sensor specifications
Storage Temperature Body -40 to 80 ℃
Sensor See sensor specifications
Operation Humidity Body 5 to 99% RH (Non-condensing)
Sensor See sensor specifications
Pressure Range 90 to 110KPa
Max. air velocity 6m/s
[Figure 2. Components of GTD-2000Ex]
3. Specications
GTD-2000Ex
Instruction Manual

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10_11
[Table 1. Description on components of GTD-2000Ex]
4. Name and description of each part
GTD-2000Ex
Instruction Manual
NO NAME DESCRIPTIONS
9Reset Key
Converted when cancelled during parameter setting or touched for more than once by using
Magnet bar to return to the previous state. (Converted to the previous mode by one stage at a
time upon every touch.
10 ↑(UP) Key Converted or transformed by one stage at a time when touched once by using Magnet-bar upon
mode conversion or figure transformation (transformed to the higher stage)
11 ↓(DOWN) Key Converted or transformed by one stage at a time when touched once by using Magnet-bar upon
mode conversion or figure transformation(transformed to the lower stage)
12 External Earth Ground
- Outside grounding for protection from outside noise or strong electric field
- For grounding cable, use conductor larger than 4mm upon coupling connection
13 Mount Hole Hole to mount Gas Detector onto outer wall and other installation place.
14 Sensor Place for detection of actual gas leakage where the amounts of leaked gas are converted to
electric signals for transmission to Main PCB
15 Conduit Connection
Provided for supply of power to detection unit and lead-in of the cable for measured output
signals upon installation operation, with 3/4", 1/2" PF or NPT being prepared for Cable lead-in unit
16 Internal Ground
- Inside of Detector should be grounded for protection from noise or strong electric field of outside
- Use a conductor of larger than upon coupling and connection of grounding wire.
5. Installation
5.1. Separation of Housing Cover
■ When Cover is separated, separate Display Parts in
the following order.
① Simultaneously push inward the fixing chains on
left side and right side on the front face of LCD unit.
② Separate from Gas detector body by pulling
Display Parts forward in the pushed state.
③ Main PCB is installed below Detector Body after
separation of Display Parts.
Absolutely no one other the approved users or those of the headquarters in charge of installation and repair should
be allowed to install in the field, open or operate Cover of the installed gas leakage detector. Otherwise serious
damages to life and property may be inflicted. Also, make sure to shut off the power supply and conduct operation
after checking whether explosive GAS remains or flammable substances are present in the surroundings
■ <Warning - Do not open during current application.>
■ Cover can be separated when the cover for gas leakage
detector is turned counterclockwise after slotted set
screw for fixing of body's cover (M4 x 1ea) is turned
3~4 turns clockwise by using a hexagonal wrench (M2).
When Cover is separated, LCD unit is displayed.
[Figure 4. Separation method for Display Part]
[Figure 3. Slotted set screw]

[Table 2. Description on main parts of Main PCB]
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12_13
5. Installation5. Installation
GTD-2000Ex
Instruction Manual
5.2. Configuration of Main PCB
■ When Display Parts are separated, the layout diagram for Main PCB terminals as follows can be seen
■ HART Option board can be mounted by using OC1, OC2, OC3 of the above layout diagram, and is mounted by
using 3Ø Screw hole on the top left side of HART Option board.
■ Configuration of terminal
■ When Display Parts are separated, Terminal Block in Main PCB can be seen as shown in the following figure,
which is separated from Main PCB when held by hand and pulled up.
■ <Warning - Conduct operation after shutting off the power supply upon connection of power supply terminal.>
■
Loosen by turning counterclockwise the terminal-fixing screws at 5 places in the upper part of the separated
Terminal Block CN12 (VISO, +V, mA, -V, ETH) Connector by using Θ driver, connect DC18-31V power supply
to +, - , andSignal Cable to mA , followed by locking terminal-fixing screws at 5 places clockwise to prevent
terminal from breaking away, and fit it in Main PCB as before separation
No NAME DESCRIPTION
1CN8 Power & Output Signal Terminal
2J1 4~20mA Source / Sink selection jumper ( ON: Source Type, OFF: Sink Type )
3CN1 Display LCD Connector
4CN4 Sensor Connector
5CN2 Program download Connector
6D1 Status LED (Blinks by the unit of 1 sec in the case of normal operation )
7OC1, OC2, OC3 HART Option Board Connector
8CN9 Warning light (GTL-100) Interface Connector
[Figure 5.Layout diagram for Main PCB terminals]
[Figure 6. Configuration of CN8 terminal]
[Table 3. Detailed description on CN8 terminal]
NO PCB SILK PIN NAME DESCRIPTION
4~20mA Source Drive (J1 Jumper ON) 4~20mA Sink Drive (J1 Jumper OFF)
1VISO VIS N.C 4~20mA Sink In(+)
2+24V ++24V / POWER (+)
3mA mA 4~20mA Source Out 4~20mA Sink Out(-)
4GND -GND / POWER (-)
5ETH ET EARTH
■ Upon configuring the Terminal , use CVVS or CVVSB 2.0sq↑ Shield Cable.
■
To connect 4Pin Terminal of the existing old-style GTD2000Ex, fasten the terminal based on +24V as No.2 plate.
Terminal mounting screw

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5. Installation5. Installation
GTD-2000Ex
Instruction Manual
5.2.1. Wire connection diagram of driving method for
4~20mA Source
5.2.3. Wire configuration diagram of driving method for
4~20mA 3Wire Sink
5.2.2. Wire connection diagram of driving method for
4~20mA Sink
[Figure 7.Configuration of 4-20mA Source]
[Figure 8. Configuration of 4-20mA Sink]
■ Connect 4-20mA Signal terminal on PLC side to 'mA' of
GTD-2000Ex, while GND terminal is used in common
with the power supply. And then turn the J1 Jumper ON.
■ HART Communicator can be used only in the model
using HART Option board
■ Connect 4-20mA Sink output (+) terminal on PLC
side to VISO terminal, and (-) terminal to (24V DC)
(-) terminal. Connect 'mA' terminal of GTD-2000Ex
to 'GND' terminal. Then connect turn the J1 Jumper OFF.
■ Connect 4-20mA Sink output (+) terminal on PLC side
to VISO terminal, and (-) terminal to 'mA' terminal.
And then turn the J1 Jumper OFF.
■ HART Communicator can be used only in the model
using HART Option board.
[Figure 9. Configuration of 4-20mA 3Wire Sink]
5.3. Length of installed cable
■ The maximum length between GTD-200Ex and power supply is determined by the wire specifications.
■ Maximum installation length= VMAXDROP ÷ IMAX ÷ WIRER/m ÷ 2
·VMAXDROP: Maximum Power Loop Voltage Drop (=Power Supply voltage - min operating voltage)
·IMAX: Maximum current value of GTD-2000Ex
·
WIRER/m: The resistance of the wire (ohms/meter value available in wire manufacturer's specification data sheet)
■ An example for installation length using 24V power supply and 16AWG is as follows.
·GTD-2000Ex minimum operating voltage = 18 Vdc
·VMAXDROP = 24 - 18 = 6V
·IMAX = 0.2A( 200mA )
·6 ÷ 0.2 ÷ 0.01318 ÷ 2 = 2276m ≒ 2.000m

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5. Installation
GTD-2000Ex
Instruction Manual
■ Installation length of power supply cable according to cable classification is as shown in the following table.
AWG mm2 COPPER RESISTANCE(ohms/m) METERS
12 3.31 0.00521 2879
14 2.08 0.00828 1811
16 1.31 0.01318 1138
18 0.82 0.02095 715
20 0.518 0.0333 450
[Figure 10. Length calculation of installed cable for GTD-2000Ex]
[Table 4. Installation length of power supply cable for GTD-2000Ex]
6. Operation Flow of detector
6.1. Initial operation state (Power On)
■ When power is supplied to the power supply terminal on MAIN PCB board after wiring, the following contents can
be confirmed in the LCD unit, a stabilization time of about 30 minutes is required after initial supply of operation
power, and normal operation occurs from the time of sufficient stabilization.
GTD-2000
[V X.XX]
- When power supply is turned ON, model name and product firmware version are displayed in
LCD(OLED).
SELF TEST
[ >>>0179] - SELF TEST is executed for 3min, and '>' character in the 2nd row informs progress state
[ %LEL]
[ 0.0]
- Operated as follows when it is in Normal state.
- In the 1st row, measured GAS NAME and measuring GAS unit are alternatingly displayed by the unit of
1sec, while the current measured value is displayed in the 2nd row.
- When Magnet-bar is in contact with 'Func' key for more than 2 sec in the current screen, it is changed
to the setting Mode.
※ '*' character is displayed in the left part of the 1st row during HART communication
※ When ENG. Mode is turned ON, '<' character is displayed in the left part of the 2nd row
[ COMB.]
[ 0.0]
[ %LEL]
[ 30]
-
When the 1st or the 2nd Alarm occurs, it is operated as follows..(It is operated when ALARM USED item
of ALARM Mode is turned ON)
- In the 1st row, it is operated in the same way as in Normal state, while ALARM message and gas
measured value are alternatingly displayed in the 2nd row by the unit of 1 sec.
- When explosion-proof warning light of GTL100 is installed, red LED and Buzzer are operated by
blinking by the unit of 1 sec upon occurrence of the 1st Alarm, while they continue to be operated
without blinking upon occurrence of the 2nd Alarm.
- If Latch is turned on during Alarm function, Alarm continues to be operated when not cleared by
using Reset.
[ %LEL]
[ ALARM1 ]
[ %LEL]
[ OVER ]
- When the gas measurement value is inputted as larger than 10%. The text of "OVER" is displayed by
the unit of 1 second, and 4~20mA is operated as 22mA.
[ %LEL]
[ UNDER ]
- When the gas measurement value is inputted as less than-10%. The text of "UNDER" is displayed by
the unit of 1 second, and 4~20mA is operated as 2mA.
※ The relevant function operates when UNDER function is turned ON.
[FAULT1]
SEN EMPT
- When there is abnormality in the device, Fault No. and message are outputted.
- At this time, 4~20mA is operated as less than 2mA.
- Mode displayed when Fault No.1 sensor on left side is not mounted.
6.2. Gas Measuring Mode
■ When there is no abnormality in SELF TEST after power is turned ON, the following state of gas measurement is
automatically entered into.

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GTD-2000Ex
Instruction Manual 6. Operation Flow of detector6. Operation Flow of detector
6.3. Operation Flow 6.4. Menu Configuration Table
■ After Power is turned On, undergo the self diagnosis process and enter in the measuring mode. At this time entering
inside system mode is possible through the front face key operation.
■ Timeout between Level1 and Level2의 Timeout is 10 seconds, while it is configured as 1 hour in calibration of and
Test Mode.
■ When "RESET" key is touched in program Mode screen, it is returned to measuring state, while it is returned to the
upper stage when "RESET" key is touched in each program setting screen.
■ Operation key for control of sensor system mode is defined as follows.
[Figure 11. Mode configuration of GTD-2000Ex]
ITEM NAME DESCRIPTION
FUNC Function key
Entry function for sensor Mode setting (Input with Magnet-bar for more than 2 seconds in the
measuring mode) . Entry function for the next stage ofLevel2 and saving function for setting values
RESET Reset key Move to the stage before the entered LEVEL
↑Up key Change the setting value Plus for the next stage mode configured in LEVEL1 and Level2
↓Down key
Entry function for sensor Mode setting (Input with Magnet-bar for more than 2 seconds in the
measuring mode) . Entry function for the next stage ofLevel2 and saving function for setting value
LEVEL1 LEVEL2 DEFAULT
NAME PARAMETER
PROGRAM
MODE
GAS TYPE (Gas Type) [DEFIN./USER] DEFIN.
GAS SEL(Gas Select) Select embedded gas name COMB.
UNIT SEL (Unit Select) %/%LEL/PPM/PPB %LEL
D-POINT(Decimal Point) 0.100/1.00/10.0/100 100
HIGH SCL (High Scale) 1~10000 100
PASSWORD 00~99 00
CALIBRA.
MODE
(Calibration Mode)
CALIBRA.
[ZERO]
(Calibration Zero)
ZERO CAL
[NO,YES] [NO]
ZERO GAS
[ 0]
ZERO >>>>
[SUCCESS / FAIL]
CAL. DATA
[ 0/ FAIL]
CALIBRA.
[SPAN]
(Calibration Span)
SPAN CAL
[NO , YES] [NO]
SPAN GAS
[ 0]
SPAN SET
[ 50/ FAIL] 50
SPAN >>>>
[SUCCESS / FAIL ]
CAL. DATA
[ 0]
ALARM
MODE
ALM USED (Alarm Used) [OFF / ON] OFF
AL LATCH (Alarm Latch) [OFF / ON] OFF
A1 LEVEL (Alarm-1 Level) [1 ~ 9999] 20
A1 TYPE (Alarm-1 Type) [INC / DEC] INC
A1 DBAND (Alarm-1 Dead Band) [0.0 ~ 10.0%F.S] 0
A1 TIME (Alarm-1 Time) [0~ 60]SEC 1
A2 LEVEL (Alarm-2 Level) [1 ~ 9999] 40
A2 TYPE (Alarm-2 Type) [INC / DEC] INC
A2 DBAND (Alarm-2 Dead Band) [0.0 ~ 10.0%F.S] 0
A2 TIME (Alarm-2 Time) [0~ 60]SEC 1
SENSOR MODE Factory Setting
MAINTEN.MODE Factory Setting
DEVICE MODE Factory Setting
VERSION MODE Factory Setting
TEST MODE Factory Setting

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GTD-2000Ex
Instruction Manual
7.1. PROGRAM MODE
PASSWORD
[**]
- When "FUNC" key is touched for more than 2 sec by using Magnet-bar in measuring state, Password
mode is entered into.
- Touch " FUNC" key after setting Password by using "↑"key or "↓" key .
PROGRAM
MODE
- If Password is accurate, Program item is entered into.
- Mode is changed according to predetermined order whenever "↑"key or "↓"key is touched.
( PROGRAM -> CALIABRA. -> ALARM -> SENSOR -> MAINTEN. ->DEVICE -> VERSION -> TEST )
GAS TYPE
[ DEFIN. ]
- As a mode for setting type of Gas name, Gas Type is changed whenever "↑"key or "↓"key is touched.
(DEFIN. / USER)
- DEFIN. Is an acronym for Define,and selected when the gas name set inside is used, while USER is
used for personal determination of the gas name by the user.
- If "FUNC" is touched when the desired Gas Type is displayed, Gas name is set and the next Program
item is entered into.
GAS SEL
[ COMB. ]
- As a mode for setting of Gas name, Gas name is changed whenever "↑"key or "↓"key is touched.
- When Gas Type is set by DEFIN., gas name can be selected for use, while 5 characters are set for
use by the user when set as USER. Available characters are figure, alphabet capital letter, space,
dot, and a cursor in black box form as shown in the left-side box is displayed when the position is
moved to the set character.
USER GAS
[■ ]
UNIT SEL
[ %LEL ]
- As a mode for setting of Gas measuring unit, Gas measuring unit is changed whenever "↑"key or
"↓"key is touched.
( % / %LEL / PPM / PPB ).
- If "FUNC" key is touched when the desired Gas measuring unit is displayed, and the next Program item
is entered into.
D-POINT
[ 100]
- As a mode for setting of decimal point, the position of decimal point is changed whenever "↑"key or
"↓"key is touched.(0.100/1.00/10.0/100)
- If "FUNC" key is touched when the desired position of decimal point is desired, the position of decimal
point is set and the next Program item is entered into.
HIGH SCL
[ 100]
- Mode for setting High scale value to be displayed at the time of Full Range with the scale value being
increased or decreased whenever “↑”key or “↓” key is touched ( 1 ~ 10000 )
- If "FUNC" key is touched when the desired High scale is displayed, the value of High scale is set and
the next Program item is entered into.
PASSWORD
[00]
- Mode for setting Password , which is checked upon entering in the Program Mode.
- If "FUNC" key is touched after setting by using "↑" key or "↓" key , the password is set and the next
Program item is entered into.
7. System Mode7. System Mode
7.2. CALIBRATION MODE
7.2.1. Zero Calibration
PASSWORD
[**]
- When "FUNC" key is touched for more than 2sec by using Magnet-bar in measuring state, Password
mode is entered into.
- Touch " FUNC" key after setting Password by using "↑" key or "↓" key.
CALIBRA.
MODE
- Select "CALIBRA. MODE" by touching “↑”key or “↓”key .
- If "FUNC" is touched when "CALIBRA. MODE“ is displayed, Calibration Mode is entered into.
- When "RESET" key is touched, the measuring state is returned to.
CALIBRA.
[ZERO]
-
If "FUNC" key is contacted when "CALIBRATION MODE" item is displayed, Zero Calibration item is selected.
- If "FUNC" key is touched when it is [ZERO] by touching "↑" key or "↓" key, Zero Calibration mode is entered into.
ZERO CAL
[ NO] - Zero Calibration is executed if FUNC key is touched when it is [YES] by touching “↑”key or “↓”key.
ZERO GAS
[ 0]
-
Zero calibration is automatically executed if FUNC key is touched when the measured value is stabilized
after clean air or 100% nitrogen as the gas is injected in the detector unit at the flow rate of 500mL/min
for about 1 minute by using a calibration apparatus .
ZERO >>
[SUCESS]
- When Zero calibration is successful, "ZERO SUCCESS" is displayed in LCD Display for 2 seconds, and
then converted to CALIBRATION DATA Mode.
- When Zero Calibration is not successful, "ZEROFAIL" is displayed for 2 seconds, and then converted to
CALIBRATION DATA Mode.
-
ZERO FAIL occurs when the sensor input value exceeded by more than 70% of the total ADC input range.
ZERO >>
[ FAIL ]
CAL.DATA
[ 0]
- Function for checking whether calibration was normal after execution of calibration as a Mode for
displaying measured values after calibration,
- Display FAIL Text and the current measured value at an interval of 1sec in the case of FAIL.
- When "RESET" key is touched, "CALIBRATION MODE" is returned to.
■ Due the characteristics of Gas detector, a stabilization time of at least about 30 minutes is required after supply of
power, and the management criteria may be varied with field conditions.

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GTD-2000Ex
Instruction Manual 7. System Mode
7.2.2. Span Calibration
CALIBRA.
MODE
- Select "CALIBRA. MODE" by touching "↑" key or "↓" key .
- If FUNC" key is touched when "CALIBRA. MODE" is displayed, Calibration Mode is entered into.
- When "RESET" key is touched, the measuring state is returned to.
CALIBRA.
[SPAN]
- If "FUNC" key is touched when it is [SPAN] by touching "↑" key or "↓" key , Span Calibration mode is
entered into.
SPAN CAL
[ NO] - If "FUNC" key is touched when it is [YES] by touching "↑" key or "↓" key, Span Calibration is executed.
SPAN GAS
[ 50]
- If "FUNC" key is touched when the measured value is stabilized after injection of standard gas in sensor
unit for about 90sec at a flow rate of 500mL/min by using the calibration apparatus, the next mode is
entered into.
- When Hold function of Maintenance Mode is turned ON , the current maximum value of SPAN gas is
Held, and the held value is displayed in the 1st row.
- The current measured value is displayed in the 2nd row.
[ 50]
[ 50]
SPAN SET
[ 50]
- As a Mode for setting of standard gas value, the value is set by touching "↑" key or "↓" key when there
is no Fail message.
- Fail message is displayed when the value of injected standard gas is not normal, with the Fail message
being as follows. Fail message and Span set values is displayed alternatingly.
① "LOW FAIL" occurs when the difference between injected Gas value and ZERO calibration value is
less than 1%
② "HIGH FAIL" occurs when the value of injected Gas is more than 95% of total ADC input range.
- "RNG FAIL" occurs when the value of injected Gas operates as the currently set SPAN value, exceeds
the input range of ADC by more than 95%.When the SPAN value is controlled, the relevant message is
automatically cleared in the case of normal state
SPAN SET
LOW FAIL
SPAN SET
HIGH FAIL
SPAN >>
[SUCESS]
- If "FUNC" key is touched after completion of setting for standard gas value, Span Calibration is
automatically executed. If successful, "SPAN SUCESS" is displayed for 2sec in LCD Display, and
then converted to "CAL DATA" Mode.
- If Span Calibration is not successful, "SPAN FAIL" is displayed for 2sec, and then converted to
"CAL DATA" Mode.
SPAN >>
[ FAIL ]
CAL.DATA
[ 0]
- Mode for displaying measured values after calibration, as a function for checking whether calibration
was normal after execution of calibration.
- When "RESET" key is touched, "CALIBRATION MODE" is returned to.
7. System Mode
7.3. ALARM MODE
PASSWORD
[**]
- When "FUNC" key is touched for more than 2sec in measuring state, Password mode is entered into.
- Touch " FUNC" key after setting of Password by using "↑" key or "↓" key .
ALARM
MODE
- Select "ALARM MODE" by touching "↑" key or "↓" key .
- If "FUNC" key is touched when "ALARM MODE“ mode is displayed, Alarm setting item is entered into.
- When "RESET" key is touched, the measuring state is returned to.
ALM USED
[ ON]
- Item for turning the Alarm mode setting ON/OFF.
- ON/OFF state is changed by touching "↑" key or "↓" key, where Alarm function and Alarm Mode can
be set in the case of ON.
- GTL100 explosion-proof warning light can be used only when set for ON .
- When "FUNC" key is touched, the next mode is entered into.
AL LATCH
[ ON]
- Mode for setting of Reset method after Alarm1 operation where change occurs to "ON" and "OFF"
whenever "↑"key or "↓" key is touched.
- "OFF" setting is for the function of automatic resetting of Alarm, while "ON" setting is for the function of
resetting only when the Reset key is pushed.
- If "FUNC" key is pushed when the desired mode is displayed, the mode is set and the next Alarm
setting mode is entered into.
A1 LEVEL
[ 20]
- Mode for setting ofAlarm1 level1, where the Alarm1 level is increased or decreased whenever "↑" key
or "↓" key is touched.
- If "FUNC" is touched when the desired Alarm1 value is displayed, the Alarm1 value is set, and the next
item is entered into.
A1 TYPE
[INC]
- Mode for setting of operation direction of Alarm1, where "INC" or "DEC" is displayed whenever "↑" key
or "↓" key is touched..
- "INC" Mode is the Mode setting of operating when it is larger than or the same as Alarm setting value,
while "DEC" Mode is the mode operating when it is smaller than or the same as Alarm setting value.
- If "FUNC" key is touched when the desired Mode is displayed, the Mode is set and the next item is
entered into.
A1 TYPE
[DEC]
A1 DBAND
[ 0]%F
- Mode for setting of Dead band value for operation of Alarm1 where the value is set by using "↑" key
or "↓" key .
- Function where Alarm1 operates at a value more than Alarm1 level plus Dead band value, and where
Alarm1 is cleared at a value less than Alarm1 level minus Dead band value.
- If "FUNC" key is touched when the desired Dead band value is displayed, the Alarm1 value is set and
the next item is entered into.

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GTD-2000Ex
Instruction Manual 7. System Mode
A1 TIME
0 SEC
- Function to prevent occurrence of instantaneous malfunction of Alarm1 due the effects of outside
impact and noise rather than normal operation, where the range for time setting can be set within 0~60sec.
- For setting of Alarm1 delay time, "Alarm1 delay time is increased or decreased by the unit of Sec
whenever "↑" key or "↓" key is pushed.
- If "FUNC" key is pushed when the desired Alarm1 delay time is displayed, the Alarm1 delay time is set
and the next item is entered into.
- Ex) Alarm setting value: In the case of 20% LEL / Delay time: 5 Sec, alarm occurs when the measured
value exists at more than the alarm setting value for more than 5sec based on 20%LEL, while the alarm
does not occurs when it is lowered below the alarm setting value within 5 Sec.
A2 LEVEL
[ 20]
- Mode for setting of Alarm2 level, where 다 Alarm2 level is increased or decreased whenever "↑" key
or "↓" key is touched .
- "If FUNC" key is touched when the desired Alarm2 value is displayed, the Alarm2 value is set and the
next item is entered into.
A2 TYPE
[INC]
- As a mode for setting of operation direction of Alarm2, "INC" or "DEC" is displayed whenever "↑" key or
"↓" key is touched.
- "INC" Mode is the mode operating when it is larger than or the same as the Alarm setting value, while
"DEC" Mode is the mode operating when it is smaller than or the same as the Alarm setting value.
- If "FUNC" key is touched when the desired mode is displayed, the mode is set and the next item is
entered into .
A2 TYPE
[DEC]
A2 DBAND
[ 0]%F
- Mode for setting of Dead band value for operation of Alarm2, where the value is set by using "↑" key
or "↓" key.
- Mode where Alrm2 operates at a value of more than Alarm2 level plus Dead band value, while Alarm2
is cleared at a value of less than Alarm2 level minus Dead band value .
- If "FUNC" key is touched when the desired Dead band value is displayed, the Alarm2 value is set and
the next item is entered into.
A2 TIME
0 SEC
- Function to prevent occurrence of instantaneous malfunction of Alarm2 due to the effects of outside
impact and noise rather than normal operation, where the range of time setting can be set within 0~60sec.
- For setting of Alarm2 delay time, "Alarm2 delay time is increased or decreased by the unit of Sec
whenever "↑" key or "↓" key is pushed..
- If "FUNC" key is pushed when the desire Alarm2 delay time is displayed, the Alarm2 delay time is set
and Alarm Mode is returned to.
- Ex) Alarm setting value: In the case of 40% LEL / Delay time: 5 Sec, alarm occurs when the measured
value exists at more than the alarm setting value for more than 5sec based on 40%LEL, while the alarm
does not occur when it is lowered below the alarm setting value within 5 Sec.
8.Troubleshooting
8.1. Fault List
[Table 5. Fault List]
FAULT MESSAGE DESCRIPTION & CONDITION CAUSE FOR OCCURRENCE
FAULT1
"SEN EMPT" Occurs when Sensor module is not connected Defective connection of sensor module
FAULT2
"SEN HIGH"
Output value of sensor is outputted as more than
the maximum value of ADC
Defective sensor module or defective ADC for
Transmitter board
FAULT3
"SEN LOW"
Output value of sensor is outputted as less than
the minimum value of ADC
Defective sensor module or defective ADC for
Transmitter board
FAULT4
"EROM ERR" Defective Transmitter EEPROM Checksum Defective EEPROM for transmitter board
FAULT5
"+24V LOW"
Occurs when the main input power supply of 24V
is inputted as less than 17V
Input power supply less than 17V or defective
ADC for Transmitter
FAULT6
"ADC FAIL" Defective Transmitter ADC Defective ADC for transmitter
FAULT7
"H/W REV" Error in H/W version Defective MPU inside transmitter
FAULT8
"SEN HUNT
When hunting error in gas measured value
occurs repetitively
Defective output state of Sensor or noise for input
power supply confirmed
8.2. Recovery List
[Table 6. Recovery List]
No CAUSE FOR OCCURRENCE COPING MEASURE
1Defective Sensor module Replace Sensor
2Defective ADC for Transmitter board Replace Transmitter board
3EEPROM for Transmitter board 1) Revise and recalibrate Parameter after enforcement of factory initialization
2) Replace Sensor Unit upon occurrence of the same phenomenon
4Defective MPU inside Transmitter Replace Transmitter Main Board
5Defective output state of Sensor Replace Sensor
6Defective output state of Sensor Replace Sensor
7Noise for input power supply confirmed Check noise state for noise of outside input voltage

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GTD-2000Ex
Instruction Manual 9. Outline drawing and Dimensions9. Outline drawing and Dimensions
9.1. Standard Type 9.2. Upon coupling of warning light
[Figure 12. Outline drawing for GTD-2000Ex Standard Type] [Figure 13. Outline drawing for coupling of warning light for GTD-2000Ex]

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GTD-2000Ex
Instruction Manual
9.3. Upon coupling of Raincover
[Figure 14. Outline drawing of coupling of Raincover for GTD-2000Ex]
10.1. Selection of installation place(Data from occupational safety and health regulations)
The place to install the gas leakage detection alarm is as follows.
■
Surroundings of chemical equipment or accessory equipment with a risk of gas leakage such as compressor, valve,
reactor, piping connection part, etc. dealing with combustible and toxic substances that are installed inside and
outside buildings
■ Places for easy dwelling of gas around manufacturing equipment with ignition sources such as heating furnace, etc.
■ Surroundings of connection part of charging equipment for combustible and toxic substances
■ Substation, power distribution panel room, control room, etc. positioned within explosion-proof area
■ Other places for especially easy dwelling of ga
10.2. Selection of installation place (Data from safety management regulations for high-pressure gas)
Gas detector for gas leakage detection alarm should be installed close to the leakage parts with a risk of gas
leakage. However, for the places with easy dwelling of leaked gas although direct gas leakage is not expected, it
should be installed at a spot such as No. 1 of the following places.
■ Gas leakage detection alarm installed outside a building shall be installed at a spot for easy dwelling of gas by
considering wind direction, wind velocity, specific gravity of gas, etc.
■ When the specific gravity of the detection target gas is larger than that of air, the gas leakage detection alarm installed
inside a building should be installed at a lower part in the building, while it should be installed near ventilation hole of
the building or at an upper in the relevant building when the gas is lighter than air.
■ Alarm of the gas leakage detection alarm should be installed at a place with the Gas detector installed and a places for
permanent residence of workers.
10.3. Notes upon installation
Positions with rainwater, etc. that can be an electrical obstacle should be avoided for installation, and installation at
a place facilitating operation is recommended since periodic maintenance and repair is required. Since places with
vibration or impact can affect output values, avoid those places with vibration or impact for installation, and install in
such a way that the detector unit is directed toward the direction of gravity.
10. Notes before installation9. Outline drawing and Dimensions

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GTD-2000Ex
Instruction Manual 10. Notes before installation
■ The present instrument has a pressure-resistant, explosion-proof structure, belonging to the GROUP II aimed at gas,
vapor of general business places and chemical plants, and can be used for dangerous places of ZONE 1(ONE)-type
and of ZONE 2(TWO)-type 2.
■ Allowed temperature belong to lower than 85℃ corresponding to T6
■ In terms of ambient temperature, use in the range of -20 to 50 ℃.
■ Installation altitude: Less than 1,000M above sea level
■ Relative humidity: 5% ~ 99%(Non-condensing)
■ Installation place: Outdoors and indoors
■ Explosion ignition group of target gas or vapor: Ex d IIC T6
■
When explosion-proof cable grand is used at cable inlet or wiring construction for metal cable pipe is conducted upon
wiring connection operation, electric conduit should be sealed to prevent moving of gas, etc. through electric cable conduit
within 50mm or propagation of flames upon explosion, and products having passed safety s=certification should always be
used for all materials and the materials used for finishing of unused lead-in unit
■ More than 5 threads should be made to be coupled upon connection of the present instrument and the electric cable pipe
■ Conduct operation under the conditions satisfying other [Standards on selection, installation, and repair, etc. of electric
machine, apparatus, wiring, etc. with explosion-proof structure for business places.
VERSION CONTENTS DAT E
0.0 * Manual revised initially 2011.12.28
1.0 * Outline drawing and function added 2012.06.17
1.1 * Font changed 2016.03.12
1.2
1> SPAN SKIP menu added
2> Sensor for INSERT TYPE SENSOR added
3> FALUT 8 added
2016.08.16
2.0 * Factory mode manual separated 2016.09.27
3.0 * Installation regulation for Cable Entry in
explosion-proof instrument changed 45cm → 50mm 2017.01.20
3.1 1> Marking Error for 4-20 Analog Output revised
2> Output changed upon Maintenance mode 2017.05.04
3.2 * Changed detailed operation revised, warning statement added 2017.11.10
11. Revision record
[Figure 15. Pressure-resistant packing type] [Figure 16. Y Sealing Compound]
Cable Cable
Inside Inside
Outside Outside
Lead-in unit connector
Lead-in unit connector
Charging compound
Cable-fixing device
Pipe for piping
Cable-fixing device
Sealing ring
Sealing
ring
Connector
Pipe for piping
Compressed
element
Connector for fixing
compressed element