GASTRON GTD-3000TxW User manual

GTD-3000TxW
Instruction Manual
Read in detail for correct use.
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

Gas & Flame
Detection System
GTD-3000TxW
Instruction Manual
www.gastron.com
02_03
Greetings
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]
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.
The present product and the product manual can be changed without advance notice for performance improvement
and use convenience of the product.
■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.
*KOSHAGUIDE:P-135/6-2018
Calibration should be executed at the periods required by the manufacturer, and should be executed
every quarter unless there are separate calibration periods.

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04_05
ContentsContents
GTD-3000TxW
Instruction Manual
7. System Mode ······························································································································································ 23
7.1. PROGRAM MODE ············································································································································· 23
7.2. CALIBRATION MODE········································································································································· 24
7.2.1. Zero Calibration······································································································································· 24
7.2.2. Span Calibration······································································································································ 25
7.3. ALARM Mode···················································································································································· 26
8. Troubleshooting·························································································································································· 28
8.1. Fault List ····························································································································································· 28
8.2. Recovery List······················································································································································· 28
9. Interface Configuration············································································································································· 29
9.1. MODBUS RS485 ················································································································································ 29
9.1.1. Interface setting ······································································································································ 29
9.1.2. MODBUS RS485 Register map··············································································································· 29
10. Drawings and Dimensions········································································································································ 30
10.1. Standard Type ···················································································································································· 30
10.2. Warning Light GTL-100····································································································································· 31
10.3. During Warning Light Assembly························································································································ 32
11. Precautions before Installation ································································································································ 33
11.1. Selecting a Place for Installation (Occupation Safety and Health Act Data) ···················································· 33
11.2. Selecting a Site for Installation (High-Pressure Gas Safety Control Act Data) ················································· 33
11.3. Precautions during Installation ························································································································· 33
12. Revision History··························································································································································· 35
1. Overview ······································································································································································ 6
2. Configuration······························································································································································ 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
4.2. Lamp Function Description································································································································ 11
5. Installation···································································································································································· 12
5.1. Detachment of Housing Cover ························································································································· 12
5.2. Main PCB Configuration···································································································································· 13
5.3. Power & 4-20 mA Terminal Configuration ······································································································· 14
5.3.1. Wiring for 4~20mA Source Operation Type ·························································································· 15
5.3.2. Wiring for 4~20mA Sink Operation Type······························································································· 15
5.4. Relay and Network Terminal Configuration······································································································ 16
5.4.1. Terminal Configuration ··························································································································· 16
5.4.2. Relay Mode Configuration······················································································································ 16
5.4.3. RS485 MODBUS Setting························································································································· 17
5.5. Installation Cable Length ·································································································································· 18
6. Detector Operation Flow ········································································································································· 19
 6.1. InitialOperationStatusPowerOn····················································································································· 19
 6.2. MeasuringMode ··············································································································································· 19
 6.3. OperationFlow ·················································································································································· 20
 6.4. MenuConfigurationTable ································································································································ 21

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06_07
3. Specication
GTD-3000TxW 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 flammable
gases and to prevent accidents in advance. GTD-3000TxW toxic gas detector is installed in areas with toxic gas leak
hazards and continuously monitors gas leak. It displays measurements on built-in displays (OLED) of the detector, delivers
alarm status with visible and audible signals using a warning light, and provides Analog 4~20 mA standard output
signal. Also, for Analog 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-3000TxW flammable gas
detector must be used at a height below 1,000 m above sea level.
Body of GTD-3000ExW 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 (Analog
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
1. Overview
GTD-3000TxW
Instruction Manual
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
- Electro-Chemical Cell
- Heated-semiconductor Cell
- Photoionization detector(PID)
Detectible Gas Toxic Gas (Note1)
Measuring Range Capable to display 000.0 ~ 9999 (Note 1)
Accuracy ≤±3%/FullRange
Zero Drift ≤2%/FullRange
Response Time Depends on Sensor Module.
Refer to Sensor Specification or Contact in case for Special Gas.
Approvals Classification KCs:ExdllCT6,T5,T4
Basic Interface Analog 4-20mA current interface
HART Interface HART REV7(Option)
Option HART Board
MODBUS RS485 Board
Warranty Transmitter 2Year
Sensor 1Year
3.2. Mechanical Specifications
ITEMS SPECIFICATION
Explosion Proof type Explosion-Proof Enclosure
Dimension -Transmitter:156(W)×322(H)×110(D)mm
-Lamp:83.8(W)×85(H)×48(D)mm
Weight including Sensor App. 2.5kg
Mounting type Wall mount
Mounting Holes 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)
※Note1.Refertothemeasuredgaslistformeasuredgasesandtheirranges.Contactusforspecialgas.
[Figure 1. GTD-3000ExW Overview]
Gas
Sensor Module
(GSA860EX)
Main Board
(Transmitter)
+24V DC
4-20mA Analog
Signal Output
Display Board
(User Interface)
Transmitter enclosure
Safety Power Supply Unit
(24VDC)
Safety Controller
(PLC or DCS)
Alarm
Signalling
GTD-3000TxW Gas Detector
Hazardous Area (Filed) Safe Area

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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:
5.5W @+24 VDC
230mA @+24 VDC
Analog output Current
0-20 mA(500 ohms max load)
Allreadings±0.2mA
Measured-value signal:
4mA(Zero) to 20 mA(Full Scale)
Fault:
0-100%LEL:
100-109%LEL:
Over110%LEL:
Maintenance:
0mA
4mA - 20mA
20mA - 21.4mA
22mA
3mA
Analog output current ripple & noise max ±20uA
Relay contact Alarm1, Alarm2, Fault Relay
Rated 1.0 A @ 30VDC or 0.5 A @ 125 VAC
Wiring requirement
Power CVVS or CVVSB with shield
Analog CVVS or CVVSB with shield
RS485 STP(Shielded Twisted Pair)
Cable Connection Length Analog 2500m
RS485 1000m
EMC Protection: Complies with EN50270
3.4. Environmental Specifications
ITEMS SPECIFICATION
Operation Temperature Transmitter -20to60℃
Sensor Refer to Sensor Specification
Storage Temperature Transmitter -20to60℃
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
3. Specication
GTD-3000TxW
Instruction Manual
[Figure 2. GTD-3000TxW Components]
NO NAME DESCRIPTIONS
1Housing Protects PCB Board built in Sensor and Housing from external environmental change and shock.
2Main PCB
It amplifies output signal from the sensor and converts and send it into DC 4~20 mA standard output.
Isolation RS-485 network signal and alarm relay contact signal are outputted. Also, it sends data for
the display.
3Display PCB It displays data received from main PCB on LCD or OLED and displays the current event status with
power lamp, alarm lamp, trouble lamp.
4Power/Signal Terminal CN1 consists DC18-24 V power supply and DC 4~20 mA standard output connection terminal (VISO,
+24V, mA,-, ETH).
5Alarm signal Terminal CN10 is alarm signal connection terminal, which outputs trouble, alarm1, alarm2 relay contacts.

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4. Name and Description of Each Part
NO NAME DESCRIPTIONS
6RS-485 signal terminal CN6isIsolationRS-485networksignalconnectionterminal(A,B).
7Sensor terminal CN1 is Sensor Connection Terminal. (RD, WH, BK, BE)
8Power lamp When power is turned on, it lights on.
9Trouble lamp It lights on when there is a fault in the circuit or sensor sensitivity, etc.
10 Alarm1 lamp It lights on when gas leaks and it exceeds Alarm1 level.
11 Alarm2 lamp It lights on when gas leaks and it exceeds Alarm2 level.
12 Function key
During parameter setting, it changes to program mode when it is contacted with magnet-bar for
2 sec or longer. (Program mode, Calibration mode, Test mode, etc.) Also, it is used to enter and
set an arbitrary data.
13 Reset 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.
14 ↑(Up)key During conversion of mode or number, use the Magnet-Bar and touch once. Each touch converts
or changes one level. (Converts to the next level)
15 ↓(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. (Converts to the previous level)
16 External earth - It is an external ground for protection from external noise or strong electric field.
- Use a conductor that is 4 mm or longer when coupling ground line.
17 Mount hole Hole to fix the gas detector on external wall or other installation sites.
18 Cover fixed screw(M4) After assembling detector housing body and cover, they are fixed with hex lens bolt to prevent
detachment by external shock.
19 Sensor thread It is a mounting for gas sensor (detector).
20 Cable inlet It is provided to supply power and inlet for measured output signal of the gas detector during
installation work. As default, PF 3/4” is provided.
21 Internal earth -
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.
22 RS-485 Module /
HARTModule(Option사양)
It is a connector for Isolation Type RS-485 and HART network modules to communicate with PC
or PLC. To run RS-485 network, network address must be configured. Default is 1. To run HART
network, Polling-Address and Tag No., etc. must be configured.
23 Relay Contact Type
Selection Jumper
It is constructed to select A or B contact.
When it is not in ENERGIZER MODE, it operates in A contact (Normal Open) mode or B contact
(Normal Close) mode when Jumper is connected to a part marked as A silk or B silk, respectively.
In contrast, when it is in ENERGIZER MODE, connecting Jumper to A operates in B contact mode
and connecting Jumper to B operates in A contact mode.
24 Warning Light Connector It is a connector connected when a warning light is used. (Option)
25 Program Connector It is a connector for downloading the program for the product.
26 FRONT CASE It is an explosion-proof case made of explosion-proof plastic and emits LED light externally
through transparent window.
27 CASE RING It serves as a cover to prevent deviation of front case.
28 SEXANGLE BOLT It serves to prevent deviation after case ring assembly and is fixed by mood bolt.
NO NAME DESCRIPTIONS
29 CASE BODY It is the main body that protects internal buzzer and other parts by body.
30 BUZZER It receives signal upon an event of error and generates warning sound.
31 FIXED RING It prevents deviation of sinter filter upon external shock.
32 FLAME ARRESTER It blocks flow in of dust, debris, water, gas and delivers warning sound from the buzzer to
outside.
33 ARREST CAP It protects sinter filter from external shock.
34 LED COVER ItisajointforLEDPCBASS'Yandcoveredwithmoulding.
35 LEDPCBASS'Y It is a multi-color LED that displays status.
36 NUT It serves to fix parts to the compliment part.
37 SHAFT BODY It serves to fix parts to the compliment part.
38 CABLE WIRE It supplies power and transmits data.
[Table 1. GTD-3000TxW Components Description]
4.2. LAMP Function Description
■GTL-100runsbysyncingwiththedetectorandbythestatusofinstalleddetector.
■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 Part
GTD-3000TxW
Instruction Manual

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5. Installation5. Installation
GTD-3000TxW
Instruction Manual
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.
[Figure 4. Display Part Detaching Method]
5.2. Main PCB Configuration
■Afterdetachingthedisplayparts,theMainPCBterminallayoutappearsasshowninthefigurebelow.
[Table2.MainPCB주요Part설명]
No NAME DESCRIPTION
1CN8 Power & Output Signal Terminal
2J4 4~20mASource/Sink선택점퍼(ON:SourceType,OFF:SinkType)
3CN4 Display LCD Connector
4CN1 Sensor Connector
5CN5 Program download Connector
6D1 Status LED (Flashes in 1 sec interval during normal operation)
7OC1, OC2, OC3 HART Option Board Connector
8CN3 Warning light (GTL-100) Interface Connector
[Figure 5. Main PCB Terminal Layout]
■UsingOC1,OC2,andOC3showninthelayoutabove,HARTOptionRS-485MODBUSboardcanbeattached.
3ØScrew holes located at top left of option board are used for fixing.
[Figure 3. Slotted Set Screw]
■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.
■<Warning-Donotopenwhenelecticalcurrentis
flowing>
■Turntheslottedsetscrew(M4x1ea)fixingthe
cover part of main body 3~4 tuns 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.
5.1. Detachment of Housing Cover

5.3. Power and 4-20mA Terminal Configuration
■<Warning-Turnoffpowerbeforeconnectingpowerterminal>
■Afterdetachingthedisplaypart,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.
■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.
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5. Installation5. Installation
GTD-3000TxW
Instruction Manual
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
[Table 3. CN8 Terminal Detailed Description]
[Figure6.CN8TerminalConfiguration]
■UseCVVSorCVVSB2.0sq↑ShieldCableforterminalconfiguration.
■Toconnect4PinterminalfromtheexistingoldGTD-2000Txmodel,connectterminalsinreferencetopin#2,
which is +24V.
5.3.1. Wiring for 4~20mA Source Operation Type
5.3.2. Wiring for 4~20mA Sink Operation Type
■Connect4-20mAsignalterminalatPLCsideto'mA'
of GTD-3000TxW. 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
[Figure 7. 4-20mA Source Configuration]
[Figure 8. 4-20mA Sink Configuration]
Terminal Set Screw

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5. Installation5. Installation
GTD-3000TxW
Instruction Manual
5.4.1. Terminal Configuration
5.4. Relay and Network Terminal Configuration
TER. NO. PIN NO. Terminal Name Description
CN7
1TRB OUT Trouble RELAY OUTPUT Terminal. Output mode is decided by J2 Jumper setting.
2TRB COM TROUBLE RELAY COMMON Terminal
3AL1 OUT ALARM1 RELAY OUTPUT Terminal. Output mode is decided by J3 Jumper setting.
4AL1 COM ALARM1 RELAY COMMON Terminal
5AL2 OUT ALARM2 RELAY OUTPUT Terminal. Output mode is decided by J4 Jumper setting.
6AL2 COM ALARM2 RELAY COMMON Terminal
CN6 7RS485 A RS485 A Terminal
8RS485 B RS485 B Terminal
[Figure 10. Relay and RS485 Terminal]
[Table 4. Relay & RS485 Terminal Description]
5.4.3. RS485 MODBUS Setting
■MODBUSofGTC-3000TxWisoptionalandisconnectstothereceiverasshownbelow.
TER. NO. PIN NO. Terminal Name Receiver Terminal Name Notes
CN9 7485A 'TRXD+'or'A'or'P'
8485B 'TRXD-or'B'or'N'
[Table6.RS485TerminalDescription]
[Table 5. Relay Mode Setting]
■RelayofGTD-3000operatesin2typesofmethod;NormalopenandNormalclose.TheJumperis
constructed to configure relay operation method at the Main PCB and operating setting is as follows.
TER. NO. PIN NO. Terminal Name MODE Setting
CN10
1TRB OUT J2 A-C Connection: A Contact ( Normal Open )
J2 B-C Connection: B Contact ( Normal Close )
2TRB COM
3AL1 OUT J3 A-C Connection: A Contact ( Normal Open )
J3 B-C Connection: B Contact ( Normal Close )
4AL1 COM
5AL2 OUT J4 A-C Connection: A Contact ( Normal Open )
J4 B-C Connection: B Contact ( Normal Close )
6AL2 COM
5.4.2. Relay Mode Configuration
[Figure 11. Relay Mode Setting]
[Figure 9. 4-20mA 3Wire Sink Configuration]
■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-3000Txto'GND'terminal.
Then, turn off the J1 jumper.
5.3.3. Wiring for 4~20mA 3Wire Sink Operation Type

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5. Installation
GTD-3000TxW
Instruction Manual 6. Detector Operation Flow
5.5. Installation Cable Length
[Figure 12. Calculation of GTD-3000TxW Installation Cable Length]
■ThemaximumlengthbetweenGTD-3000TxW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-3000TxW
 ·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-3000TxWminimumoperatingvoltage=18Vdc
 ·VMAXDROP=24-18=6V
 ·IMAX=0.23A(230mA)
 ·6/0.23/0.01318/2=989.641m=990m
[Table 7. GTD- 3000TxW Power Cable Installation Length]
AWG mm
2
COPPER RESISTANCE(ohms/m) METERS
12 3.31 0.00521 2504
14 2.08 0.00828 1575
16 1.31 0.01318 990
18 0.82 0.02095 623
20 0.518 0.0333 623
■Powercableinstallationforeachcabletypeisasshowninthetablebelow.
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-3000
[Ver X.XX]
- When the power turns on, model name is displayed on the first row and firmware version of
the detector is displayed on the second row of LCD.
** SELFTEST **
[>>>>>>> 0179] -Selftestisperformedfor3min(30minforO2set-up),'>'symbolinthesecondrowshowstheprogres
[ COMB.]
[ 0]%LEL - It runs as below when it is normal and in gas measuring mode.
- Gas name is displayed on the first row and the current measurement and unit is displayed on the
- second row.
※DuringHART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.
※During485network,'*'isdisplayedontherightofthefirstrow.
* [ COMB.]
< 0]%LEL
[ COMB.]*A01
[ 0]%LEL
[ COMB.]
[ OVER]%LEL
-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.
[ COMB.]
[ UNDER]%LEL
-Whengasmeasurementsmallerthan-10%,"UNDER"displaysin1secintervaland4~20mArunsat2mA.
※ThefollowingfunctiononlyrunswhenUNDERison.
[FAULT 08]
SENSOR HUNTING
- When trouble occurs in the device, it displays fault number and message.
- At this time, 4~20 mA runs at 0 mA. (2 mA when HART is used.)
-Fault#-8ontheleftisamodethatisdisplayedwhenthereisrepeatedhuntingerrorfromthesensor.
6.2. Measuring Mode
■Afterpoweron,whenthereisnoerrorfrom"SELFTEST",itautomaticallyentersMeasuringMode.

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6. Detector Operation Flow6. Detector Operation Flow
GTD-3000TxW
Instruction Manual
6.3. Operation Flow
■Afterpoweron,itpassesself-diagnosticprocessthenentersMeasuringMode.Here,byoperatingfrontkeys,youcan
go to internal System Mode.
■TimeoutforLevel1andLevel2are10s.Itissetto1h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.
[Figure 13. GTD-3000TxW Mode Configuration]
[Table 8. Operation Key Description]
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 entry function and setting value 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
■Operationkeysfordetectorsystemmodearedefinedasbelow.
6.4. Menu Configuration Table
LEVEL1 LEVEL2 DEFAULT
NAME PARAMETER
PROGRAMMABLE
MODE
GAS TYPE [DEFINE/USERG.] DEFINE
GAS SELECT Factory Set COMB.
UNIT SELECT %/%LEL/PPM/PPB %LEL
DECIMAL POINT 0.100/1.00/10.0/100 100
HIGH SCALE 1~9999 100
PASSWORD 00~99 00
CALIBRATION
MODE
CALIBRATION
[ZERO]
ZERO CALIBRATION
[NO, YES] [NO]
ZERO GAS
[ 0]
ZERO PROCESSING
[SUCCESS / FAIL]
CALIBRATION DATA
[ 0 / FAIL]
CALIBRATION
[SPAN]
SPAN CALIBRATION
[NO, YES] [NO]
SPAN GAS VALUE
[ 0]
SPAN SET VALUE
[50 / FAIL] 50
SPAN PROCESSING
[SUCCESS / FAIL ]
CALIBRATION DATA
[ 0]
ALARM PROGRAM
MODE
ALARM OPERATING [AUTO/MANUAL] AUTO
ALARM RELAY TYPE DE-ENERGIZED/ENERGIZED DE-ENERGIZED
FAULT RELAY TYPE DE-ENERGIZED/ENERGIZED DE-ENERGIZED
ALARM1 TYPE SEL.
(ALARM1 TYPE SELECT) [INCREASE/ DECREASE] INCREASE
ALARM1 LEVEL ADJ
(ALARM1 LEVEL ADJUST) [ 1~Full Scale] 20
ALARM1 DEAD BAND [0.0~FullScale의10%] 0.0
ALARM1 TIME SET [0~60]SEC 1
ALARM1 RELAY CTL
(ALARM1 RELAY CONTROL) [ON / OFF] ON

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6. Detector Operation Flow
GTD-3000TxW
Instruction Manual
[Table 9. Menu Configuration Table]
LEVEL1 LEVEL2 DEFAULT
NAME PARAMETER
ALARM PROGRAM
MODE
ALARM2 TYPE SEL.
(ALARM2 TYPE SELECT) [INCREASE/ DECREASE] INCREASE
ALARM2 LEVEL ADJ
(ALARM2 LEVEL ADJUST) [ 1~Full Scale] 40
ALARM2 DEAD BAND [0.0~FullScale의10%]%FS 0.0
ALARM2 TIME SET [0~60]SEC 1
ALARM2 RELAY CTL
(ALARM2 RELAY CONTROL) [ON / OFF] ON
SENSOR MODE FACTORY Mode
MAINTENANCE MODE FACTORY Mode
485 MODBUS MODE FACTORY Mode
DEVICE MODE FACTORY Mode
VERSION MODE FACTORY Mode
TEST MODE FACTORY Mode
SYSTEM MODE FACTORY Mode
7.1. PROGRAM MODE
PASSWORD
[**]
-Contacting"FUNC"keywiththeMagnet-barfor2sorlongerinMeasuringModeentersPassword
- mode.
-AftersettingPasswordusing"↑"or"↓"key,contact"FUNC"key.
PROGRMAMMABLE
MODE
- If password is correct, it enters Program mode.
-Bycontacting"↑"or"↓"key,modechangesindefinedorder.
- (PROGRAMMABLE->CALIABRATION->ALARM->SENSOR ->MAINTENANCE->485 MODBUS->DEVICE->
- VERSION->TEST->SYSTEM)
GAS TYPE
[ DEFINE ]
-Modethatsetsgasnametypeandcontacting"↑"or"↓"keychangesgastype.
- (DEFIN. / USERG.)
- DEFINE is selected when a built-in gas name is used. USERG. Is selected to define the gas name
- directly by a user.
-Whenadesiredgastypeisdisplayed,contact"FUNC"keytosetthegasnameandenterProgramMode.
GAS SELECT
[ COMB. ]
-Modethatsetsgasname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6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
[■ ]
UNIT SELECT
[ %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.
DECIMAL 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 SCALE
[ 100 ]
-Modethatsetshighscalevaluethatshouldbedisplayedforfullrange.Contacting"↑"or"↓"key
- increases or decreases the scale value. ( 1 ~ 9999 )
-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.
-Defaultissetto"00".
-Setusing"↑"or"↓"keythencontact"FUNC"keytosetthepasswordandenterthenextProgram
- Mode.
7. System Mode

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7. System Mode7. System Mode
GTD-3000TxW
Instruction Manual
7.2. CALIBRATION MODE
7.2.1. Zero Calibration
PASSWORD
[**]
-Contacting"FUNC"keywiththeMagnet-barfor2sorlongerinMeasuringModeentersPassword
- mode.
-AftersettingPasswordusing"↑"or"↓"key,contact"FUNC"key.
CALIBRATION
MODE
-Contact"↑"or"↓"keytoselect"CalibrationMode".
-Contact"FUNC"keywhen"CALIBRATIONMODE"isdisplayedtoenterCalibrationMode.
-Contact"RESET"keytoreturntoMeasuringMode.
CALIBRATION
[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 CALIBRATION
[YES] -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 PROCESSING
SUCCESS >>>>
-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 PROCESSING
FAIL >>>>
CALIBRATION 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
CALIBRATION
MODE
-Contact"↑"or"↓"keytoselect"CalibrationMode".
-Contact"FUNC"keywhen"CALIBRATIONMODE"isdisplayedtoenterCalibrationMode.
-Contact"RESET"keytoreturntoMeasuringMode.
CALIBRATION
[SPAN] -Contact"↑"or"↓"keytoachieve[SPAN]thencontact"FUNC"keytoenterSpanCalibrationmode.
SPAN CALIBRATION
[YES] -Contact"↑"or"↓"keytoachieve[YES]thencontact"FUNC"keytoperformSpanCalibration.
SPAN GAS VALUE
[ O ]
- 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,contact"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.
[ 0]
< O ]
SPAN SET VALUE
[ 5O ]
-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.
CALIBRATION DATA
CALIBRATION DATA
CAL HIGH ERROR
SPAN PROCESSING
SUCCESS >>>>
-Aftercompletingthestandardgasvaluesetting,contacting"FUNC"keyautomaticallyrunsSpan
- Calibration.Whenitsucceeds,"SPANPROCESSINGSUCCESS"isdisplayedonLCDdisplayfor2sec
- thenitchangesto"CALIBRATIONDATA"Mode.
-Whenspancalibrationisnotsuccessful,"SPANPROCESSINGFAIL"isdisplayedfor2secandit
- changesto"CalibrationDataMode".
SPAN PROCESSING
FAIL >>>>
CALIBRATION 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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7. System Mode7. System Mode
GTD-3000TxW
Instruction Manual
7.3. ALARM MODE
PASSWORD
[**]
-Contacting"FUNC"keywiththeMagnet-barfor2sorlongerinMeasuringModeentersPassword
- mode.
-AftersettingPasswordusing"↑"or"↓"key,contact"FUNC"key.
ALARM PROGRAM
MODE
-Contact"↑"or"↓"keytoselect"AlarmProgramMode".
-Contact"FUNC"keywhen"ALARMPROGRAMMODE"isdisplayedtoenterAlarmsettingmode.
-Contact"RESET"keytoreturntoMeasuringMode.
ALARM OPERATING
[ AUTO ] -Itisamodethatsetsresetmethodafteraneventofalarm.Contacting"↑"or"↓"keychangesbetween
- "AUTO"and"MANUAL".
-"AUTO"modeautomaticallyresetsthealarm."MANUAL"moderesetsthealarmonlywhenResetkeyis
- pressed.
ALARM OPERATING
[ MANUAL]
ALARM RELAY TYPE
DE-ENERGIZED
-ItisamodethatsetsResetmethodafteraneventofAlarm.Contacting"↑"or"↓"keychangesbetween
- "DE-ENERGIZED"and"ENERGIZED".
-"DE-ENERGIZED"deactivatesenergizermodeand"ENERGIZED"activatesenergizermode.
FAULT RELAY TYPE
DE-ENERGIZED
-ItisamodethatsetsResetmethodafteraneventofFAULT.Contacting"↑"or"↓"keychanges
- between"DE-ENERGIZED"and"ENERGIZED".
-"DE-ENERGIZED"deactivatesenergizermodeand"ENERGIZED"activatesenergizermode.
ALARM1 TYPE SEL.
[INCREASE ] -ItisamodethatsetsoperationaldirectionofAlarm1.Contact"↑"or"↓"keytodisplay"INCREASE"or
- "DECREASE".
-"INCREASE"moderunswhenthevalueisatAlarm1thresholdorhigher."DECREASE"moderunswhen
- the value is at Alarm 1 threshold or lower.
ALARM1 TYPE SEL.
[DECREASE ]
ALARM1 LEVEL ADJ
[ 20]
-ItisamodethatsetsAlarm1levelthreshold.Contact"↑"or"↓"keytoincreaseordecreaseAlarm1level,
- respectively.
-Whenadesiredalarm1thresholdisdisplayed,contact"FUNC"keytosetitandenterthenextitem.
ALARM1 DEAD BAND
[ 0.0]%FS
-ItisamodethatsetsoperationrangeofAlarm1.Contact"↑"or"↓"keytoincreaseordecreasethevalue,
- respectively.
-WhenAlarm1isin"INCREASE"mode,itrunsatAlarm1threshold+Deadbandandisreleasedat
- Alarm1 threshold - Dead band.
-Whenadesiredvalueisdisplayed,contact"FUNC"keytosetthedeadbandvalueandenterthenext
- Alarm Program Mode
ALARM1 TIME SET
[ 1] SEC
-ItisamodethatsetsAlarm1dwelltime.Contact"↑"or"↓"keytoincreaseordecreasethevalue,
- respectively.
-Displayednumberisinsecandinarangefrom0to60.Whenadesiredvalueisdisplayed,contact
- "FUNC"keytosetthealarmdwelltimeandenterthenextAlarmProgrammode.
ALARM1 RELAY CTL
[ ON]
-ItisamodethatsetswhethertocontactrelaycontactduringAlarm1operation.Contact"↑"or"↓"keyto
- changethedisplaybetween"ON"or"OFF".
- In ON mode, relay runs during Alarm1 operation. In OFF mode, relay do not run during Alarm1 operation.
ALARM2 TYPE SEL.
[INCREASE ] -ItisamodethatsetsoperationaldirectionofAlarm2.Contact"↑"or"↓"keytodisplay"INCREASE"or
- "DECREASE".
-"INCREASE"modeoperateswhenthevalueisequalorlargerthansetalarmthreshold."DECREASE"
- mode operates when the value is equal or less than set alarm threshold.
ALARM2 TYPE SEL.
[DECREASE ]
ALARM2 LEVEL ADJ
[ 40 ]
-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Alarm
- Program mode.
ALARM2 DEAD BAND
[ 0.0 ]%FS
-ItisamodethatsetsoperationaldirectionofAlarm2.Contact"↑"or"↓"keytoincreaseordecrease
- the value, respectively.
-WhenAlarm2isin"INCREASE"mode,itrunsatAlarm1threshold+Deadbandandisreleasedat
- Alarm2 threshold - Dead band.
-Whenadesiredvalueisdisplayed,contact"FUNC"keytosetthedeadbandvalueandenterthenext
- Alarm Program Mode
ALARM2 TIME SET
[ 1] SEC
-ItisamodethatsetsAlarm2dwelltime.Contact"↑"or"↓"keytoincreaseordecreasethevalue,
- respectively.
-Displayednumberisinsecandinarangefrom0to60.Whenadesiredvalueisdisplayed,contact
- "FUNC"keytosetthealarmdwelltimeandenterthenextAlarmProgrammode.
ALARM2 RELAY CTL
[ ON]
-ItisamodethatsetswhethertocontactrelaycontactduringAlarm2operation.Contact"↑"or"↓"key
- tochangethedisplaybetween"ON"or"OFF".
- In ON mode, relay runs during Alarm2 operation. In OFF mode, relay do not run during Alarm2
- operation.

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GTD-3000TxW
Instruction Manual 8.Troubleshooting 9. Interface Conguration
8.1. Fault List
[Table 10. Fault List]
FAULT MESSAGE DESCRIPTION & CONDITION 발생원인
[FAULT-02]
"SENSORHIGH" Sensor output is above ADC max. value. Defective sensor module or transmitter board ADC
[FAULT-03]
"SENSORLOW" Sensor output is below ADC min. value. Defective sensor module or transmitter board ADC
[FAULT-04]
"EEPROMERROR" Defective Transmitter EEPROM Checksum Defective Transmitter Board EEPROM
[FAULT-05]
"+24VLOW"
It occurs when 24 V main input power is inputed
with voltage below 10 V.
Input power below 10V or defective Transmitter
ADC
[FAULT-06]
"ADCFAIL" Defective Transmitter ADC Defective Transmitter ADC
[FAULT-07]
"H/WREVISION" H/W Version Error Defective MPU inside Transmitter
[FAULT-08]
"SENSORHUNTING"
When there is repeated hunting error in gas
measurement
sensor output status may be poor or check
for input power noise.
8.2. Recovery List
[Table 11. Recovery List]
No CAUSE SOLUTION
1Defective Sensor Module Change Sensor
2Defective Transmitter Board ADC Change Transmitter Board
3Defective Transmitter Board EEPROM 1) Perform Factory Initialization then correct parameter and re-calibrate
2) Change sensor unit when the same problem occurs again
4Defective MPU inside Transmitter Change Transmitter Main Board
5Poor Sensor Output Status Change Sensor
6Check Input Power Noise Check External Input Voltage Noise Status
9.1. MODBUS RS485
TYPE ADDRESS BITS DESCRIPTION
Measured Gas
Concentration 30001 BIT15~0 Gas Measurement (Integer/Decimal point is not considered)
High Scale Setting 30002 BIT15~0 High Scale Setting (Integer/Decimal point is not considered)
Alarm 1 Setting 30003 BIT15~0 Alarm 1 Setting (Integer/Decimal point is not considered)
Alarm 2 Setting 30004 BIT15~0 Alarm 2 Setting (Integer/Decimal point is not considered)
Gas detector status
value 10000
BIT0 Alarm 1 Active Status
BIT1 Alarm 2 Active Status
BIT2 Fault Active Status
BIT3 Maintenance Mode Status
BIT4 Test Mode Status
BIT5 Calibration Mode Status
BIT6 Reserved
BIT7 Toggle Bit (Bit reversal in 2 sec interval)
External Test 3BIT0~7 Gas Detector Test Mode Setting
External Reset 2BIT0~7 Exit Gas Detector Test Mode
9.1.1. Interface setting
9.1.2. MODBUS RS485 Address map
■DataFormat:RTU
■Baudrate:9600bps
■Databits:8bits
■Stopbit:1bits
■Parity:Even
■Fordetails,pleasegotowww.modbus.org
[Table12.RS485MODBUSAddress구성]

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GTD-3000TxW
Instruction Manual 10. Drawings and Dimensions10. Drawings and Dimensions
10.2. Warning Light GTL-10010.1. Standard Type
[Figure 15. GTL-100 Drawing][Figure 14. GTD-3000TxW Standard Type Drawing]

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32_33
GTD-3000TxW
Instruction Manual 10. Drawings and Dimensions
10.3. When Connecting Warning Light
[Figure16.GTD-3000TxWWarningLightConnectionDrawing]
11. Precautions before Installation
11.1. 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.
11.2. 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.
11.3. 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Corbelow,whichcorrespondstoT6.
■ Surroundingtemperatureshallbeinarangeof-20to60°C(Forthemainunitandsensor,refertoeachsensormanual.)
■InstallationHeight:1,000Mbelowsealevel

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GTD-3000TxW
Instruction Manual 11. Precautions before Installation
■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]
12. Revision History
[Figure 17. High-Pressure Packing Type] [Figure 18. 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
VERSION CONTENTS DATE
0.1 * Manual Initial Revision 2017. 09. 29
0.2 * Correct typos and typographical errors 2019. 11. 19