GASTRON GTD-2000ExW User manual

GTD-2000ExW
Instruction 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]
www.gastron.com
Read in detail for correct use.

Gas & Flame
Detection System
GTD-2000ExW
Instruction Manual
www.gastron.com
02_03
Thank you very much for purchasing a product from GasTron Co. Ltd.
We, GasTron, specialize in Gas Detector & Gas Monitoring System and have been recognized by many
customers for the best quality and ease of use. We always seek to help our customers to find the product
they need and we continuously research to develop a gas detector that satisfies our customers. From now on,
you can solve all problems related to gas detectors with a GasTron product. We, GasTron, will be responsible
for your satisfaction.
This user manual describes operation and simple maintenance methods etc. for the gas detector. Please read
carefully and store it in a safe place. Using it as a reference will help a lot when you have a question during
use.
* KOSHA GUIDE : P-135/6-2018
Calibration must be performed at a frequency requested by the manufacturer and shall be performed quarterly when
the calibration period is not specified.
The product and manual are subject to change without a notice for the product's functional improvement and ease of use.
■Forapreciseoperationofthegasdetector,pleaseperformaninspectionandacalibrationat
least once per 6 months.
( * In reference to KOSHA GUIDE: P-135/6-2018 / 7.2 In-house inspection, section 2)
■Forapreciseoperationofthegasdetector,inspectionandcalibrationusingareferencegasbefore
measurement is recommended.
■Failuretocalibratemayresultinmalfunctionoftheequipmentduetoagingofthesensor.
■Onlyanindividualspecializedingasdetectormaydisassemblethedevice.
■Wirespecificationforthepowercablemustbedecidedinreferencetothe"Installationcablelength"
section.
■Pleasecontactourcompany'stechnicalsupport,e-mail,orwebsiteforinquiriesrelatedto
inspection and calibration of the gas detector.
Greetings
In case of a problem after purchasing the product,
please contact the address below.
· Address : 23 Gunpo Advanced Industry 1-ro,
Gunpo-si, Gyeonggi-do
· Tel : [phone]
· Fax : [phone]
· URL : www.gastron.com
· e-mail : [email protected]

www.gastron.com
04_05
ContentsContents
GTD-2000ExW
Instruction Manual
7.2.1. Zero Calibration······································································································································· 22
7.2.2. Span Calibration······································································································································ 23
7.3. ALARM MODE··················································································································································· 24
8. Troubleshooting·························································································································································· 26
8.1. Fault List ····························································································································································· 26
8.2. Recovery List ······················································································································································ 26
9. Drawings and Dimensions········································································································································ 27
9.1. Standard Type ··················································································································································· 27
9.2. Warning light GTL-100······································································································································ 28
9.3. When Connecting Warning Light ····················································································································· 29
10. Precautions before Installation ································································································································ 30
10.1. Selecting a Place for Installation (Occupation Safety and Health Act Data) ···················································· 30
10.2. Selecting a Site for Installation (High-Pressure Gas Safety Control Act Data) ················································· 30
10.3. Precautions during Installation·························································································································· 30
11. Revision History··························································································································································· 32
1. Overview ······································································································································································ 6
2. Configuration······························································································································································ 6
3. Specifications······························································································································································· 7
3.1. Basic Specification·············································································································································· 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
4.2. LAMP Function Description······························································································································· 11
5. Installation···································································································································································· 12
5.1. Detachment of Housing Cover·························································································································· 12
5.2. Main PCB Configuration···································································································································· 13
5.2.1. Wiring for 4~20mA Source Operation Type ·························································································· 15
5.2.2. Wiring for 4~20mA Sink Operation Type······························································································· 15
5.2.3. Wiring for 4~20mA 3Wire Sink Operation Type···················································································· 16
5.3. Installation Cable Length ··································································································································· 16
6. Detector Operation Flow ·········································································································································· 18
6.1. Initial Operation Status (Power On) ·················································································································· 18
6.2. Measuring Mode ··············································································································································· 18
6.3. Operation Flow ·················································································································································· 19
6.4. Menu Configuration Table ································································································································ 20
7. System Mode ······························································································································································ 21
7.1. PROGRAM MODE ············································································································································· 21
7.2. CALIBRATION MODE········································································································································· 22

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06_07
GTD-2000ExW flammable gas detector has been developed to detect gas leaked from industrial sites and various
flammable gases generated from factories, gas storages, and manufacturing processes that produce or use toxic gases
and to prevent accidents in advance.
GTD-2000ExW flammable gas detector is installed in areas with gas leak hazards and continuously monitors gas leak. It
displays measurements on LCD of the detector, converts and transmits data in DC 4~20 mA standard output signal. Also,
for DC 4~20 mA standard output, output signal transmission length between detector and receiver can be connected up
to 2,500 m. (When Cable CVVS or CVVSB 1.5sq and higher is used.) GTD-2000Ex flammable gas detector must be used
at a height below 1,000 m above sea level.
GTD-2000ExW
Instruction Manual
Body of GTD-2000Ex is made of Aluminum alloy and the gas sensor module is made of stainless steel. It consists of a
complete explosion-proof enclosure (Ex d IIC T6). This product can be installed in areas with combustible gas leak and
explosion hazards. It has built-in display (LCD or OLED) on the detector to display gas leak status at installed site. Internal
configuration consists of display part that indicates measurements, terminal part that output measurements (DC 4~20
mA) externally, and a PCB board. External configuration consists of sensor that detects gas leak, cable inlet, and high-
pressure explosion proof small warning light made of SUS materials. It uses magnet-bar outside the main body of
detector enabling calibration from the outside of the detector, thus, maintenance is convenient.
2. Conguration
[Figure 1. GTD-2000ExW Overview]
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
3.1. Basic Specifications
ITEMS SPECIFICATION
Measuring Type Diffusion
Measuring Value Display
- LCD or OLED Display
- Green, Red, Yellow LED
- Sound Output(95dB)
Measuring Method
Catalytic Cell
Thermal Conductivity Cell
Heated-semiconductor Cell
Detectible Gas 가연성가스(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
Approvals Classification
KCs: Ex d llC T6,T5,T4
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
Warranty Transmitter & Lamp 2Years
Sensor 1Year
3.2. Mechanical Specifications
ITEMS SPECIFICATION
Explosion-Proof Type Explosion-Proof Enclosure
Dimension - Transmitter: 136(W) × 166(H) × 110(D) mm
- Lamp: 83.8(W) × 85(H) × 48(D) mm
Weight including Sensor App. 2.2kg
Mounting Type Wall mount
Mounting Hole Ø7±0.1
Cable Inlet 3/4"PF(1/2"or3/4"NPT)
Body Material
Transmitter Aluminum Alloy
Sensor Stainless Steel (STS316)
Lamp Cover PC
Lamp Body Stainless Steel (SUS304)
3. Specication1. Overview

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08_09
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
Cable Connection Length Analog 2500m
EMC Protection: Complies with EN50270
No NAME DESCRIPTIONS
1Housing Body Protects PCB Board built in Sensor and Housing from external environmental change and shock.
2Housing Cover Top surface is built with circular glass to enable monitoring of measurement displayed on LCD.
3MAIN PCB Amplifies fine outputs generated from Sensor Element to transmit a converted output in 4~20 mA DC
standard. It sends data to display part.
4Display PCB Displays data (measurement) sent from Main/ Terminal (Transmitter) PCB on LCD and displays power
status with a power lamp.
5Power/Signal Terminal CN8 consists DC18V~31 24 V power supply and DC 4~20 mA standard output connection terminal
(VISO, +24V, mA, GND, ETH).
6Sensor Terminal CN4 is Sensor Connection Terminal.
7Power LED It is lamp that turns on when power is supplied.
8Function Key It is used to enter function setting mode from gas measuring mode by contacting magnet-bar for 2
sec or longer. It is also used to save changed data from function setting mode.
3.4. Environmental Specifications
ITEMS SPECIFICATION
Operation Temperature Transmitter -40to80℃
Sensor Refer to Sensor Specification
Storage Temperature Transmitter -40to80℃
Sensor Refer to Sensor Specification
Operation Humidity Transmitter 5 to 99% RH (Non-condensing)
Sensor Refer to Sensor Specification
Pressure Range 90 to 110KPa
Max. air velocity 6m/s
[Figure 2. GTD-2000ExW Components]
GTD-2000ExW
Instruction Manual 4. Name and Description of Each Part3. Specication

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10_11
4.1. Components
No NAME DESCRIPTIONS
9Reset Key
To cancel or return to the previous status during Parameter setting, use the Magnet-Bar and
touch once.
(Each touch returns to the previous status by one unit.)
10 ↑(UP)Key During conversion of mode or number, use the Magnet-Bar and touch once. Each touch converts
or increases displayed value by one unit.
11 ↓(DOWN)Key During conversion of mode or number, use the Magnet-Bar and touch once. Each touch converts
or increases displayed value by one unit.
12 External Earth Ground
It must be grounded to ourside of detector for protection from external noise or strong electric
field.
Use a conductor that is 4 mm or longer when coupling ground line.
13 Mount Hole Hole to fix the gas detector on external wall or other installation sites.
14 Sensor It is a site that detects actual gas leak. It converts the amount of gas leak into electrical signal and
transmits to the Main PCB.
15 Conduit Connection It is supplied for inlet of power supply and measurement output signal for the detector during
installation.Forcableinlet,PForNPT3/4",1/2"areprepared.
16 Internal Ground
It must be grounded to inside of detector for protection from external noise or strong electric
field.
Use a conductor that is 4 mm or longer when coupling ground line.
17 FRONT CASE It is an explosion-proof case made of explosion-proof plastic and emits LED light externally
through transparent window.
18 CASE RING It serves as a cover to prevent deviation of front case.
19 SEXANGLE BOLT It serves to prevent deviation after case ring assembly and is fixed by mood bolt.
20 CASE BODY It is the main body that protects internal buzzer and other parts by body.
21 BUZZER It receives signal upon an event of error and generates warning sound.
22 FIXED RING It prevents deviation of sinter filter upon external shock.
23 FLAME ARRESTER It blocks flow in of dust, debris, water, gas and delivers warning sound from the buzzer to
outside.
24 ARREST CAP It protects sinter filter from external shock.
25 LED COVER It is a joint for LED PCB ASS'Y and covered with moulding.
26 LED PCB ASS’Y It is a multi-color LED that displays status.
27 NUT It serves to fix parts to the compliment part.
28 SHAFT BODY It serves to fix parts to the opponent.
29 CABLE WIRE It supplies power and transmits data.
[Table 1. GTD-2000ExW Transmitter Components Description]
GTD-2000ExW
Instruction Manual
4.2. LAMP Function Description
■Innormalstatus,greenLEDlightsonandbuzzerdoesnotring.
■WhenAlarm-1signalisreceived,redLEDflickersin1secintervalandbuzzerringsin1secinterval.
■WhenAlarm-2signalisreceived,redLEDlightsonandbuzzerringscontinuously.
■WhenTroublesignalisreceived,yellowLEDlightsonandbuzzerdoesnotring.
4. Name and Description of Each Part4. Name and Description of Each Part

[Figure 3. Slotted Set Screw]
[Table 2. Main PCB Key Part Description]
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5. Installation5. Installation
GTD-2000ExW
Instruction Manual
5.2. Main PCB Configuration
It is prohibited for an individual, other than an approved user or a technician responsible for installation and repair from
the head office, to install a gas leak detector on site or open the cover of the installed gas leak detector and manipulate
it. This may cause serious loss of life and property from fire, explosion, and etc. In addition, please check whether there
is any remaining explosive gas or combustible material in the surroundings. Power must be turned off before performing
work.
■Afterdetachingthedisplayparts,theMainPCBterminallayoutappearsasshowninthefigurebelow.
5.1. Detachment of Housing Cover
■<Warning-Donotopenwhenelectricalcurrent
is flowing>
■Turntheslottedsetscrew(M4x1ea)fixingthecover
part of main body 3~4 turns counter clockwise(ccw)
using a hex wrench (M2) then turn the cover of gas
leak detector ccw to detach the cover.
When the cover is detached, LCD appears.
■Afterdetachingthecover,disassemblethedisplayparts
as below.
 ① Pushinleftandrightfixingringslocatedonfrontside
of LCD at the same time.
 ② Whilepushing,pullthedisplaypartstowardsthefront
to detach from gas detector body.
 ③ Afterdetachingthedisplayparts,theMainPCBis
installed at the bottom part of the detector body.
[Figure 4. Display Part Detaching Method]
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 (Flashes in 1 sec interval during normal operation)
7CN5,CN6,CN7 HART Option Board Connector
8CN9 Warning light (GTL-100) Interface Connector
[Figure 5. Main PCB Terminal Layout]

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5. Installation5. Installation
GTD-2000ExW
Instruction Manual
■UsingCN5,CN6,andCN7showninthelayoutabove,HARToptionboardcanbeattachedand3ØScrewholes
located at top left of HART option board are used for fixing.
■Afterdisassemblingdisplayparts,thereisaterminalblockintheMainPCBasshowninthefigurebelow.Holding
it with hands and pulling towards ceiling detaches it from the Main PCB.
■<Warning-Turnoffpowerbeforeconnectingpowerterminal>
■Loosen5terminalfixingscrewslocatedattoppartofdetachedterminalblockCN8(VIS,+,mA,-,ETH)
 Connectorbyturningcounter-clockwiseusingaΘdriver.ConnectDC18~24Vpowerto+,and-then
connect signal cable to mA. Tighten 5 terminal fixing screws clockwise so that terminal does not leave the track
then insert Main PCB as the same condition before disassembly.
[Figure 6. CN8 Terminal Configuration]
[Table 3. CN8 Terminal Detailed Description]
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
■UseCVVSorCVVSB2.0sq↑ShieldCableforterminalconfiguration.
■Toconnect4PinterminalfromtheexistingoldGTD-2000ExWmodel,connectterminalsinreferencetopin#2,
which is +24V.
5.2.1. Wiring for 4~20mA Source Operation Type
5.2.2. Wiring for 4~20mA Sink Operation Type
[Figure 7. 4-20mA Source Configuration]
[Figure 8. 4-20mA Sink Configuration]
■Connect4-20mAsignalterminalatPLCsideto'mA'
of GTD-2000Ex. GND terminal is used in common
with power.
Then, turn on the J1 jumper.
■HARTCommunicatorcanonlybeusedinmodels
using HART Option board.
■Connect(+)and(-)terminalsfor4-20mAsink
output at PLC side to VISO terminal and 'mA'
terminal, respectively. Then, turn off the J1 jumper.
■HARTCommunicatorcanonlybeusedinmodels
using HART Option board.
<Terminal-fixing Screw>

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16_17
5. Installation5. Installation
GTD-2000ExW
Instruction Manual
5.2.3. Wiring for 4~20mA 3Wire Sink Operation Type
■Connect(+)and(-)terminalsfor4-20mAsinkoutput
at PLC side to VISO terminal and power (24V DC)
(-) terminal, respectively. Connect 'mA' terminal
of GTD-2000ExW to 'GND' terminal. Then, turn off
the J1 jumper.
[Figure 9. 4-20mA 3Wire Sink Configuration]
5.3. Installation Cable Length
■ThemaximumlengthbetweenGTD-2000ExWandpowersupplyisdecidedbywirespecification.
■Max.InstallationLength=VMAXDROP÷IMAX÷WIRER/m÷2
 ·VMAXDROP:MaximumPowerLoopVoltageDrop(=PowerSupplyvoltage
- min operating voltage)
·IMAX : Max. Current of GTD-2000ExW
·WIRER/m: The resistance of the wire (ohms/meter value available in wire manufacturer's specification data sheet)
■Exampleofinstallationlengthsusing24Vpowersupplyand16AWGisasfollows.
 ·GTD-2000ExWminimumoperatingvoltage=18Vdc
 ·VMAXDROP=24-18=6V
 ·IMAX=0.2A(200mA)
 ·6÷0.2÷0.01318÷2=2276m≒2.000m
■Powercableinstallationforeachcabletypeisasshowninthetablebelow.
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. Calculation of GTD-2000ExW Installation Cable Length]
[Table 4. GTD- 2000ExW Power Cable Installation Length]

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18_19
GTD-2000ExW
Instruction Manual
6.1. Initial Operation Status (Power On)
■ After wiring to power terminal at the top of Main PCB board then supply power, the following contents are displayed
on LCD. Approx. 30 m of stabilization of time is needed from the initial supply of operation power and it starts to
operate normally after sufficient stabilization.
GTD-2000
[V X.XX] - When power turns on, model name and product firmware version are displayed on LCD (OLED).
SELF TEST
[ >>>0179] - Self test is performed for 3 min '>' symbol in the second row shows the progress.
[ %LEL]
[ 0.0]
- In normal operation mode, it runs as below.
- In the first row, measured gas name and unit are displayed in 1 sec interval. In the second row, the
- current measurement is displayed.
- In the current screen, touching the magnet-bar on 'Func' key for 2 sec or longer changes to setting
- mode.
※DuringModbusnetwork,'*'isdisplayedontheleftofthefirstrow.
※ENG.Whenthemodeison,'<'isdisplayedontheleftofthesecondrow.
[ COMB.]
[ 0.0]
[ %LEL]
[ 30]
- When Alarm 1 or 2 occurs, it runs as below. (It only runs when ALARM EN setting in Maintenance
- Mode is ON)
- The first row runs the same as in normal status. In the second row, alarm message and gas
- measurement are displayed in 1 sec interval.
- When GTL100 explosion-proof warning light is installed, upon an event of alarm1, red LED and buzzer
- flicker and run in 1 sec interval. Upon an event of alarm2, they continuously run without flickering.
- If alarm latch is on, the alarm continuously run until it is released using the reset key.
[ %LEL]
[ ALARM1 ]
[ %LEL]
[ OVER ]
-Whengasmeasurementlargerthan10%ofsethighscalevalue,"OVER"displaysin1secinterval.At
- this time, 4~20 mA runs as 22 mA.
[ %LEL]
[ UNDER ]
-Whengasmeasurementsmallerthan-10%,"UNDER"displaysin1secintervaland4~20mAruns
- below 2 mA.
- ※ThefollowingfunctiononlyrunswhenUNDERison.
[FAULT1]
SEN EMPT
- When trouble occurs in the device, it displays fault number and message.
- At this time, 4~20 mA runs below 2 mA.
-ItisamodethatdisplayswhenFault#1sensorontheleftisnotequipped.
6.2. Measuring Mode
■ Afterpoweron,whenthereisnoerrorfrom"SELFTEST",itautomaticallyentersMeasuringMode.
6.3. Operation Flow
■Afterpoweron,itpassesself-testthenentersMeasuringMode.Here,byoperatingfrontkeys,youcangoto
internal System Mode.
■TimeoutforLevel1andLevel2are10sec.Itissetto1hourforLevel2CalibrationandTestMode.
■When"RESET"keycontactsatProgramModeScreen,itreturnstoMeasuringMode.When"RESET"keycontacts
at each Program Setting Screen, it returns to the parent step.
■Operationkeysfordetectorsystemmodearedefinedasbelow.
[Figure 11. GTD-2000ExW Mode Configuration]
ITEM NAME DESCRIPTION
FUNC Function key Detector Mode Setting Entry Function (Insert Magnetic-bar for 2 sec or longer in measuring mode)
Level2 Next stage entering function and setting saving function
RESET Reset key Move to the previous stage from the level entered.
↑Up key Next level mode that is configured in LEVEL1 and Change in Level2 setting Plus
↓Down key Next level mode that is configured in LEVEL1 and Change in Level2 setting Minus
6. Detector Operation Flow6. Detector Operation Flow

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GTD-2000ExW
Instruction Manual
6.4. Menu Configuration Table
LEVEL1 LEVEL2 DEFAULT
NAME PARAMETER
PROGRAM
MODE
GAS TYPE (Gas Type) [DEFIN./USER] DEFIN.
GAS SEL(Gas Select) Built-in gas name selection 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 ~ Full SCL] 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 ~ Full SCL] 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
7.1. Program Mode
PASSWORD
[**]
-Contacting"FUNC"keywiththeMagnet-barfor2secorlongerinMeasuringModeentersPasswordmode.
-AftersettingPasswordusing"↑"or"↓"key,contact"FUNC"key.
PROGRAM
MODE
- If password is correct, it enters Program mode.
-Bycontacting"↑"or"↓"key,modechangesindefinedorder.
- ( PROGRAM -> CALIABRA. -> ALARM -> SENSOR -> MAINTEN. -> DEVICE -> VERSION -> TEST )
GAS TYPE
[ DEFIN. ]
-Modethatsetsgasnametypeandcontacting"↑"or"↓"keychangesgastype.
- (DEFIN. / USER)
- DEFIN. Is acronym for Define and is selected when using built-in setting of gas name. USER is
- selected when the user directly sets a gas name.
-Whenadesiredgastypeisdisplayed,contact"FUNC"keytosetthegasnameandenterProgramMode.
GAS SEL
[ COMB. ]
-Modethatsetsgasnameandcontacting"↑"or"↓"keychangesgasname.
- When gas type is set to DEFIN., built-in gas names can be selected for use. When it is set to USER,
- the user shall set gas name using 5 character for use. Characters allowed for use are number, capital
- Alphabet, space, and period. When position is moved by setting characters, a cursor in black box shape
- appears as shown in the figure on left.
USER GAS
[■SER ]
UNIT SEL
[ %LEL ]
-Modethatsetsgasmeasuringunitandcontacting"↑"or"↓"keychangesgasmeasuringunit.
- ( % / %LEL / PPM / PPB ).
-Whenadesiredgasmeasuringunitisdisplayed,contact"FUNC"keytosettheunitandenterProgram
- Mode.
D-POINT
[ 100]
-Modethatchangesdecimalplaceandcontacting"↑"or"↓"keychangesdecimalplace.
- (0.100/1.00/10.0/100)
-Whenadesireddecimalplaceisdisplayed,contact"FUNC"keytosetthedecimalplaceandenterthe
- next Program Mode.
HIGH SCL
[ 100]
-Modethatsetshighscalevaluethatshouldbedisplayedforfullrange.Contacting"↑"or"↓"key
- increases or decreases the scale value.
- ( 1 ~ 10000 )
-Whenadesiredhighscaleisdisplayed,contact"FUNC"keytosetthehighscalevalueandenterthe
- next Program Mode.
PASSWORD
[00]
- It is password setting mode. This password is checked when entering Program Mode.
-Setusing"↑"or"↓"keythencontact"FUNC"keytosetthepasswordandenterthenextProgramMode.
7. System Mode6. Detector Operation Flow

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GTD-2000ExW
Instruction Manual 7. System Mode7. System Mode
7.2. Calibration Mode
7.2.1. Zero Calibration
PASSWORD
[**]
-Contacting"FUNC"keywiththeMagnet-barfor2secorlongerinMeasuringModeentersPasswordmode.
-AftersettingPasswordusing"↑"or"↓"key,contact"FUNC"key.
CALIBRA.
MODE
-Contact"↑"or"↓"keytoselect"CalibrationMode".
-Contact"FUNC"keywhen"CALIBRA.MODE"isdisplayedtoenterCalibrationMode.
-Contact"RESET"keytoreturntoMeasuringMode.
CALIBRA.
[ZERO]
-When"CALIBRATIONMODE"isdisplayed,contacting"FUNC"keyselectsZeroCalibration.
-Contact"↑"or"↓"keytoachieve[ZERO]thencontact"FUNC"keytoenterZeroCalibration.
ZERO CAL
[ NO] -Contact"↑"or"↓"keytoachieve[YES]thencontact"FUNC"keytoperformZeroCalibration.
ZERO GAS
[ 0]
- Using a calibration tool, inject clean air or 100% nitrogen into the sensor at a flow rate of 500 mL/min
- for1min.Contact"FUNC"keywhenmeasurementisstabilizedtoautomaticallyperformZeroCalibration.
ZERO >>
[SUCESS]
-Whenzerocalibrationissuccessful,"ZEROSUCCESS"isdisplayedfor2seconLCDdisplaythenit
- changesto"CALIBRATIONDATA"Mode.
-Whenzerocalibrationisnotsuccessful,"ZEROFAIL"isdisplayedfor2secanditchangesto
- "CalibrationDataMode".
- ZERO FAIL occurs when sensor input value exceeds 70% of total ADC input range.
ZERO >>
[ FAIL ]
CAL.DATA
[ 0]
- It is a mode to display measurement after calibration and checks whether calibration is successful after
- performing auto calibration.
-Whenitfailed,itdisplays"FAIL"andthecurrentmeasurementin1secinterval.
-Contact"RESET"keytoreturnto"Calibrationmode".
■Duetocharacteristicsofthegasdetector,minimum30minofstabilizationtimeisrequiredandmaintenance
condition may change depending on site condition.
7.2.2. Span Calibration
CALIBRA.
MODE
-Contact"↑"or"↓"keytoselect"CalibrationMode".
-Contact"FUNC"keywhen"CALIBRA.MODE"isdisplayedtoenterCalibrationMode.
-Contact"RESET"keytoreturntoMeasuringMode
CALIBRA.
[SPAN] -Contact"↑"or"↓"keytoachieve[SPAN]thencontact"FUNC"keytoenterSpanCalibrationMode.
SPAN CAL
[ NO] -Contact"↑"or"↓"keytoachieve[YES]thencontact"FUNC"keytoperformSpanCalibration.
SPAN GAS
[ 50]
- Using a calibration tool, inject the standard gas to the sensor at a flow rate of 500 mL/min for 90 sec.
- Afterthemeasurementisstabilized,press"FUNC"keytoenterthenextmode.
- When Hold function in Maintenance Mode is on, the current maximum SPAN gas value is held and
- displayed in the first row.
- The current measurement is displayed in the second row.
[ 50]
[ 50]
SPAN SET
[ 50]
-Itisamodetosetstandardgasvalue.Whenthereisno"Fail"message,contact"↑"or"↓"keytoseta
- value.
- When the inject standard gas value is abnormal, it displays Fail message. Fail message is as follows.
- Fail message and span set value are displayed alternatively.
- ①"LOWFAIL"occurswhenthedifferencebetweeninjectedgasvalueandzerocalibrationvalueis
below 1%.
- ②"HIGHFAIL"occurswheninjectedgasvalueisabove95%oftotalADCinputrange.
-"RINGFAIL"occurswheninjectedgasvaluerunsinthecurrentsetspanvalue,itexceeds95%ofADC
input range. The above FAIL messages are automatically released if the status is normal after adjusting
SPAN value.
SPAN SET
LOW FAIL
SPAN SET
HIGH FAIL
SPAN >>
[SUCESS]
-Aftercompletingstandardgasvaluesetting,contacting"FUNC"keyautomaticallyrunsSpanCalibration.
- Whenitsuceeds,"SPANSUCCESS"isdisplayedonLCDdisplayfor2secthenitchangesto"CAL
- DATA"Mode.
-Whenspancalibrationisnotsuccessful,"SPANFAIL"isdisplayedfor2secanditchangesto"Cal.
- DataMode".
SPAN >>
[ FAIL ]
CAL.DATA
[ 0]
- It is a mode to display measurement after calibration and checks whether calibration is successful after
- performing auto calibration.
-Contact"RESET"keytoreturnto"Calibrationmode".

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GTD-2000ExW
Instruction Manual
7.3. ALARM MODE
PASSWORD
[**]
Contacting"FUNC"keyfor2secorlongerinMeasuringModeentersPasswordmode.
AftersettingPasswordusing"↑"or"↓"key,contact"FUNC"key.
ALARM
MODE
Contact"↑"or"↓"keytoselect"AlarmMode".
Contact"FUNC"keywhen"ALARMMODE"isdisplayedtoenterAlarmsettingmode.
Contact"RESET"keytoreturntoMeasuringMode.
ALM USED
[ ON]
It is a setting where Alarm Mode Setting is turned on or off.
Contact"↑"or"↓"keytochangeON/OFFstatus.WhenitisON,AlarmfunctionandAlarmModesettingcan
be performed.
GTL-100 explosion-proof warning light can only be used when it is ON.
Contacting"FUNC"keyentersthenextmode.
AL LATCH
[ ON]
ItisamodethatsetsResetmethodafterrunningofAlarm1.Contact"↑"or"↓"keytochange"ON"and"OFF".
"OFF"setstoautomaticallyresetthealarm."ON"settoresetthealarmonlywhenResetkeyispressed.
Contact"FUNC"keywhenadesiredmodeisdisplayedtosetthenenterthenextalarmsettingmode.
A1 LEVEL
[ 20]
ItisamodethatsetsAlarm1level.Contact"↑"or"↓"keytoincreaseordecreaseAlarm1level,respectively.
Whenadesiredalarm1thresholdisdisplayed,press"FUNC"KEYtosetitandenterthenextitem.
A1 TYPE
[INC] ItisamodethatsetsoperationaldirectionofAlarm1.Contact"↑"or"↓"keytodisplay"INC"or"DEC".
"INC"modeoperateswhenthevalueisequalorlargerthansetalarmthreshold."DEC"modeoperateswhen
the value is equal or less than set alarm threshold.
Contact"FUNC"keywhenadesiredmodeisdisplayedtosetthenenterthenextmode.
A1 TYPE
[DEC]
A1 DBAND
[ 0]%F
ItisamodethatsetsDeadbandvalueforAlarm1operation.Use"↑"or"↓"keytosetavalue.
It is a function where Alarm1 operates at values above the sum of Alarm1 level and dead band values and
releases at values below Dead band value subtracted from Alarm1 level.
Whenadesiredalarm1deadbandisdisplayed,press"FUNC"KEYtosetitandenterthenextitem.
A1 TIME
0 SEC
It is a function to prevent instantaneous malfunction of detector due to external shock and noise other than
from normal operation and time can be set in a range between 0~60 sec.
ForAlarm1dwelltimesetting,press"↑"or"↓"keytoincreaseordecreaseinunitof1sec,respectively.
WhenadesiredAlarm1dwelltimeisdisplayed,press"FUNC"KEYtosetitandenterthenextitem.
Ex.) Alarm threshold value: 20% LEL / Delay time: When it is at 5 sec, Alarm triggers when the measured
value is above the set value based on 20%LEL for 5 sec or longer. When it goes down below the set value
within 5 sec, alarm is not triggered.
A2 LEVEL
[ 20]
ItisamodethatsetsAlarm2level.Contact"↑"or"↓"keytoincreaseordecreaseAlarm2level,respectively.
Whenadesiredalarm2thresholdisdisplayed,press"FUNC"KEYtosetitandenterthenextitem.
7. System Mode
A2 TYPE
[INC] ItisamodethatsetsoperationaldirectionofAlarm2.Contact"↑"or"↓"keytodisplay"INC"or"DEC".
"INC"modeoperateswhenthevalueisequalorlargerthansetalarmthreshold."DEC"modeoperateswhen
the value is equal or less than set alarm threshold.
Contact"FUNC"keywhenadesiredmodeisdisplayedtosetthenenterthenextmode.
A2 TYPE
[DEC]
A2 DBAND
[ 0]%F
ItisamodethatsetsDeadbandvalueforAlarm2operation.Use"↑"or"↓"keytosetavalue.
It is a function where Alarm2 operates at values above the sum of Alarm2 level and dead band values and
releases at values below Dead band value subtracted from Alarm2 level.
Whenadesiredalarm2deadbandisdisplayed,press"FUNC"KEYtosetitandenterthenextitem.
A2 TIME
0 SEC
It is a function to prevent instantaneous malfunction of detector due to external shock and noise other than
from normal operation and time can be set in a range between 0~60 sec.
ForAlarm2dwelltimesetting,press"↑"or"↓"keytoincreaseordecreaseinunitof1sec,respectively.
WhenadesiredAlarm1dwelltimeisdisplayed,press"FUNC"KEYtosetitandenterthenextitem.
Ex.) Alarm threshold value: 40% LEL / Delay time: When it is at 5 sec, Alarm triggers when the measured
value is above the set value based on 40%LEL for 5 sec or longer. When it goes down below the set value
within 5 sec, alarm is not triggered.
7. System Mode

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GTD-2000ExW
Instruction Manual 8.Troubleshooting
8.1. Fault List
FAULT MESSAGE DESCRIPTION & CONDITION CAUSE
FAULT1
"SENEMPT" Occurs when sensor module is disconnected. Defective Sensor Module Connection
FAULT2
"SENHIGH" Toxic sensor output is above ADC max. value. Defective sensor module or transmitter board ADC
FAULT3
"SENLOW" Toxic sensor output is below ADC min. value. Defective sensor module or transmitter board ADC
FAULT4
"EROMERR" Defective Transmitter EEPROM Checksum Defective Transmitter board EEPROM
FAULT5
"+24VLOW"
It occurs when 24 V main input power is inputed
with voltage below 10 V.
Input power below 17 V or defective Transmitter
ADC
FAULT6
"ADCFAIL" Defective Transmitter ADC Defective Transmitter ADC
FAULT7
"H/WREV" H/W Version Error Defective MPU inside Transmitter
FAULT8
"SENHUNT
When there is repeated hunting error in gas
measurement, sensor output status may be poor or
check for input power noise.
[Table 5. Fault List]
8.2. Recovery List
[Table 6. Recovery List]
NO CAUSE SOLUTION
1Defective Sensor Module Connection 1) Check Sensor Connection and Connection status of the Connector
2) Change Sensor
2Defective Sensor Module Change Sensor
3Defective Transmitter Board ADC Change Transmitter Board
4Defective Transmitter Board EEPROM 1) Perform Factory Initialization then correct parameter and re-calibrate
2) Change sensor unit when the same problem occurs again
5Defective MPU inside Transmitter Change Transmitter Main Board
6Poor Sensor Output Status Change Sensor
7Check Input Power Noise Check External Input Voltage Noise Status
9. Drawings and Dimensions
9.1. Standard Type
[Figure 12. GTD-2000ExW Standard Type Drawing]

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28_29
GTD-2000ExW
Instruction Manual
9.2. Warning Light GTL-100 9.3. When Connecting Warning Light
[Figure 13. GTL-100 Drawing] [Figure 14. GTD-2000Tx Warning Light Connection Drawing]
9. Drawings and Dimensions 9. Drawings and Dimensions

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GTD-2000ExW
Instruction Manual
10.1. Selecting a Place for Installation (Occupational Health & Safety Act Data)
A gas leak detector alarm shall be installed in the following places.
■ Around chemical equipment and accessories that have concerns of gas leak. This includes compressors, valves, reactors,
pipe joints, etc. installed inside and outside of a building that handle combustible and toxic materials.
■Placesthatareeasierforgasestostaysuchasareasaroundmanufacturingfacilitieswithignitionsourceslikeheating
furnace, etc,
■Areasaroundequipmentforfillingcombustibleandtoxicmaterials.
■Substations,panelrooms,controlrooms,andetc.locatedwithinexplosivearea.
■Otherareasthatareeasierforgasestostay.
10.2. Selecting a Site for Installation (High-Pressure Gas Safety Control Act Data)
Gas detector of gas leak detector alarm must be installed as close to the areas with concerns of gas leakage as possible.
However, for areas where direct gas leakage is not expected but are easier for leaked gas to stay, the detector must be
installed at the point 1 of the following.
■ Gas leak detector alarm installed outside a building shall be installed at points where gas is likely to stay in consideration
to wind direction, wind speed, specific gravity of gas, etc.
■Gasleakdetectoralarminstalledinsideabuildingshallbeinstallednearthefloorwhenthespecificgravityofgasis
heavier than air and near ventilation of ceiling when it is lighter than air.
■Alarmforgasleakdetectoralarmmustbeinstalledatsiteswherethegasdetectorisinstalledandworkersarepresent.
10.3. Precautions during Installation
Avoid areas with electrical barriers such as rain water, etc. It is recommended to be installed in areas that are easier to
work in since regular maintenance is needed. Avoid areas with vibration or shock since they can affect output values.
Sensor part must be installed towards the direction of gravity.
■Thisequipmenthasexplosion-proofconstructionforinternalpressureandbelongstoGROUPIIforgasandvaporin
general work sites and chemical plants. It can be used in ZONE 1 (ONE) and ZONE 2 (TWO) hazardous sites.
■Allowabletemperatureis85℃orbelow,whichcorrespondstoT6.
■Surroundingtemperatureshallbeinarangeof-40℃~80℃(forMainbody.Forsensor,refertoeachsensormanual.)
■InstallationHeight:1,000Mbelowsealevel
■RelativeHumidity:5%~99%(Non-condensing)
■InstallationSite:IndoorandOutdoor
■ExplosionIgnitionGroupforTargetGasorVapor:ExdIICT6
■Duringwiringwork,useexplosion-proofcableglandatcableinletortightlysealcableconduitduringmetalcable
wiring construction to prevent spread of flames in case of explosion or movement of gas, etc. through the cable
conduit within 50 mm.
All materials including materials used for sealing of unused inlets must have safety certificates!
■Whenconnectingtheequipmentwithcable,screwthreadmustbetightened5threadsormore.
■Workinconditionssatisfyingother[StandardsforSelection,Installation,andMaintenance,etc.ofExplosion-proof
Electric Machine and Equipment Wiring, etc. at Work Site]
10. Precautions before Installation 10. Precautions before Installation
[Figure 15. High-Pressure 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

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32_33
GTD-2000ExW
Instruction Manual
VERSION CONTENTS DATE
0.1 * Manual Initial Revision 2017.09.29
11. Revision History