Sony Multiscan CPD-1304S User manual

73023639 g / 2017-03
GasLab Q2 Ex-d

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About this operating instructions
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Gas Quality Analyzer
GasLab Q2
Document history
Version
Date
Author
Changes
a
21.06.2016 to
30.08.2016
Gas Quality
First Version Ex d
for software version 03-03-B in test samples
b
31.08.2016
Gas Quality
Update to version 03-04-T
for pre production samples (DEKRA)
c
21.09.2016
Gas Quality
Update to version 03-05 for pre production
samples
d
30.09.2016
Gas Quality
Version 03-05 (DEKRA Reaction)
for pre production samples (NMi)
e
17.10.2016
Gas Quality
Updates and corrections
Version 03-05-A
f
27.10.2016
Gas Quality
SAP-Release
Version 03-05-A
g
21.03.2017
Gas Quality
Update to version 03-08-A
and corrections
Copyright
©2017 Elster GmbH All rights reserved.
GasLab Q2®is a registered trademark of Elster GmbH.

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Only Elster GmbH published operating instructions are to be used. Changes or translations of this
operating instructions require the written consent of Elster GmbH.
All obligations of Elster GmbH arise solely from the contracts concluded and the General Terms
and Conditions usable upon conclusion of the contract.
Warranty conditions
You will find our current warranty conditions in the General Terms and Conditions, e.g. on our
website: www.elster-instromet.com/en/general-terms-of-business
Contact
Elster GmbH (Manufacturer)
Steinern Str. 19-21
55252 Mainz-Kastel / Germany
Phone:
[phone]
Email:
[e-mail]
Website:
www.elster-instromet.com
Technical Assistance Center:
Phone:
[phone]
Email:
[e-mail]
Website:
www.elster-instromet.com

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Gas Quality Analyzer
GasLab Q2
Contents
1About this operating instructions 7
1.1 Symbols and terms 7
1.2 Notes on using this operating instructions 9
1.3 Technical advice and repairs 9
2Safety information and warnings 10
2.1 Intended use 10
2.2 Appropriate hardware persons 10
2.3 General safety notes 11
2.4 Instructions and warnings on the housing of Q2 12
2.5 Safety information about: Application / gases / ambient conditions 12
2.6 Electrical safety information 14
2.7 Risk of explosion / explosive range / explosion protection 15
2.8 Operator liability 15
3Measurement concept of GasLab Q2 16
3.1 Description of main features 16
3.2 Description of the operating principle 17
3.3 System setup 19
4Structure of GasLab Q2 20
4.1 Instrumentation area 21
4.2 Connection area 23
4.2.1 Gas connections and breathers 24
4.2.2 Electrical entries and connections 25
4.3 Human machine interface (HMI) 26
5Transport, storage, installation 27
5.1 Transport / storage 27
5.2 Mechanical installation of GasLab Q2 28
5.2.1 Location of use and installation 28
5.2.2 GasLab Q2 dimensions 29
5.2.3 Dismantling 30
5.3 Fluidic installation of GasLab Q2 30
5.3.1 Gas connections 30
5.3.2 Connecting gas lines (general) 32
5.3.3 Preparing the process gas 32
5.3.4 Connecting or replacing gas cylinders 33
5.3.5 Connecting the exhaust tubing 35
5.3.6 Connect Q2 to process gas line and complete fluidic installation 36
5.3.7 Leak testing of installation 36
5.4 Electrical installation 37
5.4.1 Power supply / electric protection / grounding 37
5.4.2 Cables and electrical entries (power supply and communication) 38
5.4.3 Electrical connection plan and electrical interfaces (outputs and inputs) 39
6Commissioning and decommissioning 41
6.1 Preconditions for commissioning and operation 41
6.2 Start-up and normal operation 42

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6.2.1 Checking and adjusting the gas flows 43
6.2.2 Checking device settings and signals 43
6.3 Decommissioning 44
7GasLab Q2 displays and operating the device 45
7.1 Concept of the operation panel 46
7.1.1 Local and remote operation 46
7.1.2 Navigation in operation panels and displays 47
7.2 Displays of the GasLab Q2 51
7.2.1 Home (display overview / device language / start-up-errors) 51
7.2.2 Display Info Q2 54
7.2.3 Error List main display 57
7.2.4 Display Sensor values 58
7.2.5 Display Control (calibration / verification / touch) 59
7.2.6 Display System (device) (time / user / logbook). 60
7.2.7 Q2 Main display (calculation standard) 66
7.2.8 Display Archive and Display Modbus 70
7.3 Operation and modes 71
7.3.1 Monitoring of the devices functions and the security switch 71
7.3.2 Operation mode: Analysis (automatic analysis normal operation) 72
7.3.3 Operation mode: Operational calibration (manual) 72
7.3.4 Operation mode: Verification (special operation) 74
7.3.5 Entries and changes via device-displays 76
7.3.6 Login, logout and change password at operation panel 78
7.3.7 View into logbooks 81
7.3.8 Change IP address and basic network settings at device 83
7.3.9 Update System time at device 84
7.4 Announcement of events 86
7.4.1 LEDs over the interactive display 86
7.4.2 View event-related display texts in the error list 87
7.4.3 List of event-related display texts 87
7.4.4 Accept and removal of event-related display texts 91
7.4.5 Other possible error events during normal operation (troubleshooting) 92
8Operation and parameter setting on the PC with enSuite 95
8.1 PC-Software concept of GasLab Q2 95
8.1.1 Installation and start of enSuite 96
8.1.2 Connection and disconnection with devices 97
8.1.3 Readout and watch parameterization (device settings) 98
8.1.4 Watch factory parameterization of the SFBs and AFBs 99
8.2 User management and Login 100
8.2.1 View access rights 101
8.2.2 Restriction on Q2 relevant parameters (Use virtual login) 101
8.3 Change existing device settings (Parameterization) 102
8.3.1 Change device parameterization offline (Offline-Parameterization) 103
8.3.2 Edit device parameterization in a connected device (Online- Parameterization) 106
8.3.3 Immutable preferences 106
8.3.4 Change automatic operational calibration 107
8.3.5 Reset all parameters to default condition 108
8.4 EnSuite during sevice operation 108
8.4.1 Customize displays 108
8.4.2 Update date and time with enSuite 109
8.4.3 Set time-related values and actions in the Time Service SFB 110

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Gas Quality Analyzer
GasLab Q2
8.4.4 User profile management 110
8.4.5 Functions “Read out archives” and “Show archives” 112
8.4.6 Function “Live data and trending“ 114
8.4.7 Use approval file (optional) 116
9Maintenance and repair 117
9.1 Maintenance 117
9.2 Repair and Elster service work 118
10 Technical data and notes 119
10.1 Tables and information additional to the device 119
10.2 Inscriptions and hints on the device 121
10.2.1 Metering ranges and safety notes 121
10.2.1 Type plates 122
10.2.2 Extra additional markings 123
10.3 Declaration of Conformity 124
11 Appendix 125
11.1 Nomenclature 125
11.2 Definitions and explanations 126
12 Index 129
12.1 Keywords 129
12.2 Figures 134

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1 About this operating instructions
This documentation describes the function, installation, commissioning, operation, use and
maintenance of the Honeywell Elster® GasLab Q2 Gas Quality Analyzer (hereinafter called
GasLab Q2 or short Q2).The device can be used worldwide, use operating instructions in your
native language or a language you know verry well to understand all the information.
The safety and warning notices on the device are in English or French. Within the scope of this
operating instructions, the information in the corresponding translation is reproduced.
The operating instructions is aimed at professionals in the field of gas industry / process
measuring technique and provides the device-specific knowledge. In addition to general specialist
knowledge, it enables the safe and efficient handling of the instrument.
Different basic skills are required depending on the field of activity,
corresponding information can be found in the respective chapters.
The definitions used are listed See chapter 11.2.
Compliance with all the safety notes and handling hints specified in this Operating Manual is a
prerequisite to working with the device in a safe manner and using it properly, and for obtaining
accurate measurement and calculation results. In addition, compliance is also necessary with the
guidelines, standards, local accident prevention regulations and general safety regulations that
apply for the device's area of application.
The printed documentation attached to the device reflects the technical status
at the time of delivery. Subject to technical modifications in the course of
further development. These will be introduced without notice in the latest
version. You can download an updated PDF copy of the operating instruction
from our DOCUTHEK (www.docuthek.com). Be sure to use the appropriate
instructions for your Q2 device.
The figures used to represent the issues discussed and may vary slightly from
the actual design.
1.1 Symbols and terms
The safety notes and warnings in this Manual and on the GasLab Q2 support the proper handling
of the device. The Symbols and Terms are defined below. Text that is preceded by such a sign
must be observed.
Icon
Meaning
indicates information that is important and relevant to the safety function.
HAZARD MAPS like DANGER! / WARNING! / CAUTION! / ATTENTION!
Indicate hazardous situations which may result in material damage and bodily harm or
even death if disregarded.

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Gas Quality Analyzer
GasLab Q2
Icon
Meaning
Explosion
indicates that death and / or injury to persons can occur and additional significant
damage to plant, equipment and environment may arise if proper precautions are not
taken.
means that severe personal injury or damage to health can occur if proper
precautions are not taken. Death is also possible.
means that you can’t execute the following, unless the terms and conditions set are
met and you are qualified for the relevant work.
Important information in the operating instructions, this symbol on the device
remembers you to consider all things wich mentioned in this document.
Means that you have to supply 24 volts direct current to the device
Indicating the main PE terminal (Protective earth)
Indicating the functional earth terminal (FE)
Identifies information that is interesting and useful for a particular topic, but is not
relevant to safety.
ASTM 3588
Links (Hyperlink) You can navigate through different displays via the hyperlinks. In the
example, you change the calculation standard; more information on this can be found
in chapter 7
[OK] [F1]
Marking of buttons and keys are additionally framed with square brackets.
/ /
Message marking
(Alarm / Warning / Note) in enSuite (in most of this cases you can use the online help)
/ /
Signal-Marking (alarm / warning / information) in enSuite
This triangle prompts you for an action in enSuite
This character will show you the immediate result of your enSuite action.
The result of your enSuite operation is not shown until the device is running in normal
operation after you have transferred an enSuite parameterization to the device and
the device has rebooted with this parameterization.

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1.2 Notes on using this operating instructions
This documentation contains device-related safety information and warnings that must be
observed to avoid personal injury and property damage and to ensure safe and proper operation,
and must be strictly followed. To ensure the comprehensive and integrated understanding of the
measurement system, it is essential that you read the operating instructions before starting work.
It shall suffice to read the respective chapter in order to gain knowledge
about subsections, such as operation. The entire technical documentation
should always be on hand.
The term "cable" is always used for electrical lines or wires to ensure a
better distinction between gas and electric lines in this documentation.
General safety rules are assumed to be known and not fully reproduced
here.
The safety notes and warnings (usually shown with a symbol in a gray box
like here) includes notes and information that must be read and adhered to
in any case!
Compliance with the hints and rules of this operating instructions ensures the safe functioning of
the device, delivers reliable measurement results, extends the life of the device and saves you
money on service and spare parts costs. If you want to use additional equipment or devices in
combination with the measurement device, please ensure that they are suitable components.
These supplements have their own operating manuals that you should also observe.
Missing warning symbols or a missing hints does not absolve you from
your personal safety responsibility!
1.3 Technical advice and repairs
If you have any questions or concerns arising from this operating instructions and for repairs,
please contact our Customer Service team. The contact details can be found on page 3 of this
operating instructions.
Elster GmbH is also always interested in new information and experiences
that result from the application and that may be useful in order to improve
our products.

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Gas Quality Analyzer
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2 Safety information and warnings
The safety notes and warnings in this operating instructions (and on the measurement device in
English) support the proper handling of the device and how to avoid injury and damage. The
device meets the relevant safety standards. If used appropriately it poses no dangers that could
threaten the health of personnel or cause damage to property.
The safety information and warnings must be read and adhered to for the
safe and proper operation in any case!
The necessary language skills are assumed.
Avoidable damage to the equipment resulting, for example, from
insufficient knowledge of the operating instructions, shall lead to the loss
of any liability claims against Elster GmbH.
Missing warning symbol does not exempt individuals from personal
responsibility for security.
If it is determined that the device or parts of the device, such as safety valves or inlet
tubes, are damaged or no longer operate safely, the measuring device has to be taken
out of operation, disconnected from the gas and electricity supply and secured from
being put into operation inadvertently.
2.1 Intended use
The GasLab Q2 is designed and constructed exclusively for its intended use. This is to analyze
natural gas or natural like gas as described later in this document (see chapter 3 and following).
Intended use includes compliance with all specifications in this operating instructions or on the
device. Any use beyond the intended use or any other use of Q2 is considered misuse. Any claims
for damages due to misuse are excluded.
The device is to be used only for its intended purpose as described in this
operating instructions. If you use the device for other tasks or purposes,
the protection may be impaired. This can lead to dangerous situations.
2.2 Appropriate hardware persons
Mounting, electrical installation, commissioning, inspection and
maintenance work (opening the housing) should only be carried out by
specialists.
The appropriate specialists have expertise according to EN-IEC 60079-14 Annex A or have
comparable expertise. They have the ability to recognize hazards and risks, to assess their own
work and avoid potential hazards.

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Knowledge of this operating instructions, including in particular its safety and warning information,
as well as the general safety rules are essential prerequisites.
The station operator should carefully select appropriate persons. Elster
GmbH shall not be liable for damages and consequential damages which
result from the use of untrained personnel
2.3 General safety notes
Warning!
Risk of explosion if is Q2 improper mounted and connected!
The Q2 may only be installed in an hazardous area according to the listed
approval on the device.
The preconditions of the relevant local / national standards (e.g. IEC
EN 60079-14 installation of Ex equipment in europe) must be followed.
The following safety and warning notes must be observed unconditionally
(If in doubt please get in contact with the Elster GmbH):
Any individual appointed to perform work on or with the Q2 must read and
understand this operating instructions prior to the work.
In order to avoid risks and to ensure that the Q2 performs in an optimal
manner, no changes or modifications that were not expressly authorized
by the Elster GmbH may be performed on it.
The Q2 must not be exposed to temperatures below −25°C or above +55°C
during storage and operation. This must be ensured.
All connected equipment shall be reinforced isolated from mains.
The electrical power supply (24 V DC fluctuation including mains
fluctuation ±15%) must have a reliable electrical isolation.
The use of a PELV system is allowed.
Supply and communication (cables and wires not part of device) must be
shielded and be conform to the local installation guidelines.
Use cables or wires and cable entries suitable for 10°C (10K) above the
maximum ambient temperature.
The installer must ensure that the wiring is protected against overload and
short circuit. Its supply must be fused externally.
The connection for grounding on the bottom of the device has to be used
in any case.

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Gas Quality Analyzer
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2.4 Instructions and warnings on the housing of Q2
The information on the device must always be observed and followed!
On the device are warnings in
English and / or French.
The type plate does not provide
sufficient space, so there are
additional warning lables on the
housing.
The figure below shows the
possible places.
Figure 2.1:
Locations for warnings
2.5 Safety information about: Application / gases / ambient conditions
The device requires various gases with different risk potential for operation and measurement.
After switching on, an automatic flushing of the internal gas channels is done.
It is not allowed to connect gasses that are flammable or explosive under
exclusion of oxygen(i.e. acetylene (C2H2)).
It is not allowed to connect gas containing more that 3.0 percent of oxygen
(volume-based).
Gases may form an explosive mixture with air, may be toxic, harmful or
dangerous for the environment.
Maximum inlet pressure is not to exceed 0.5MPa(g) (5 bar(g)). The operator
must ensure this!
Only natural and natural gas-like gases (all components gaseous) must be
used.
For other gas types please contact Elster GmbH before usage. For gas
specifications please see chapter 10.

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Lead all exhaust gases away from the GasLab Q2, using vent lines refer to chapter 5.3.5. The
main breather must vent to the ambient atmosphere. Gas will only escape from the breather if
there is a fault. Look for appropriate measures for the disposal of effluent gas. This can be
achieved by a suitable exhaust / vent tube to a safe area or appropriate ventilation of the location.
The breather outlet doesn’t have to be connected because in normal
operation there will be no gas coming out of it.
When it is connected i.e. to vent to a safe area when Q2 is installed inside a
building. This vent line shall be protected against dirt and rain and vent
atmospherically.
The following specifications apply to a vent tubing:
- The allowable pressure drop should be less than 20mbar (2kPa) at a flow of 7.5l/min.
This corresponds to a straight smooth tube with minimum inside diameter of 8 mm
and length of 40 m. Fittings or curves will reduce the allowable length. Other dia-
meters and lengths, which may increase the pressure drop, are only possible after
consulting Elster GmbH.
- The breather venting line connected to the internal thread of the breather must remain
separated from other vent lines.(In case of any doubt please contact Elster GmbH)
DO NOT CONNECT THE BREATHER VENT LINE TO ANY OTHER EXISTING
VENT LINE!
The loosening or untightening of the breather by unauthorized persons is
prohibited!
When working on the gas lines always ensure adequate ventilation and
protect yourself from gases containing aggressive or toxic components.
Environmental Specifications (see chapter 10.1) must be maintained.
Otherwise, an additional conditioning cabinet is to be used.
Only use the device in a potentially corrosive area following consultation
with and approval by Elster GmbH.
Depending on the location of use and ambient conditions, the device can get hot or cold
surfaces. This may occur, for example, as a result of self-heating at 55 °C ambient temperature.
Direct contact with hot or cold surfaces can cause burns and frostbite. In
case of doubt, the device should be operated via the remote operation
panel.

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2.6 Electrical safety information
As for the installation, (de)commissioning and maintenance in general, reference is made to the
corresponding technical regulations. All national, local or corporate standards and regulations that
are usable to the location of the Q2 must always be taken into account and applied.
The electrical connections of Q2 must be matched to the connection plan
(see chapter 5.4.3). The power supply must be externally protected by a
fuse or an automatic circuit breaker. The over-voltage and current
protection for the wireing must be ensured by the power supply too.
The electrical connection of the Q2 may only be made via suitable
feedthroughs to the connection box of the device.
Standards and guidelines on the following topics must in particular be taken into account:
Electrical apparatus / devices for explosive gas atmospheres areas
Operation of electrical installations
Inspection and maintenance of electrical installations in hazardous areas
Installation of power installations with nominal voltages up to 1000V - tests - initial tests
Ordinance on Industrial Safety
Q2 has no On Off switch of its own. For functional or emergency purpose
the installation must be equipped with a switch or circuit breaker used as
disconnecting device. (Operating voltage range 48 V DC or higher)
This disconnecting-device (not part of the supply) must be located in the vicinity of the Q2
according to the Ex and electrical safety regulations. It should consider isolation of all power
supply conductors to the hazardous area and comply with the preconditions as mentioned in the
standard for where it is located. An example of such a device according to the ISO/IEC61010-1
is a circuit breaker which triggers within 120 seconds at a current of 200/U. At exactly 24V DC
this current is 8.3 A. A suitable value could be C4A circuit breaker.
The electrical entry must be installed on site and, if necessary, also re-
placed there to comply with explosion protection regulations. This should
only be done by authorized personnel who comply with the relevant regu-
lations. As a result, Elster GmbH is only be responsible for the correctness
of this work if it were performed by or on behalf of Elster GmbH.
The electrical installation must in any case comply with all usable laws and
regulations for the respective location (e.g. DIN, EN, VDE, UL etc.)
Housing and mounting structure must be included in the local grounding situation or potential
equalization. The device must be grounded by the ground screw at the bottom of the housing.
Operation of the device without potential equalization or wilful interruption
of this connection is prohibited.
Opening the device under voltage or working on its internal energized
electrical equipment is generally prohibited, especially in explosive areas.

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2.7 Risk of explosion / explosive range / explosion protection
ATTENTION!
DO NOT OPEN GASLAB Q2 WHEN
AN EXPLOSIVE ATMOSPHERE IS PRESENT
DISCONNECT POWER BEFORE OPENING
(Please also observe the other sections of chapter 2 and see safety label
on the Q2 at all times See chapter 10.2)
The connection and installation must be made according to the listed electrical wiring diagrams,
connection diagrams and tubing diagrams. Make sure that all the necessary safety measures have
been taken before, during and after working on the Q2 or before turning it on.
Do not open the lower compartment of the housing
without the permission of Elster GmbH!
Gas will only escape from the breather if there is a fault. Look for appropriate
measures for the disposal of effluent gas. This can be achieved by a suitable
exhaust tube or appropriate ventilation of the location.
It is forbidden to operate devices with damage, modified housing or
inappropriate connections as the explosion protection is no longer provided.
Please contact Elster GmbH if you have any questions.
2.8 Operator liability
The operator is subject to statutory occupational health and safety obligations. In addition to the
safety notes in this operating instructions, current regulations of safety, accident prevention and
environmental protection must be observed for the Q2 area of application. In addition, the operator
is responsible for ensuring the Q2 is always in a technically safe state.
The operator must ensure that the installation and maintenance work
described in this operating instructions are performed properly.
The operator is responsible for ensuring that GasLab Q2 remains in a
technically perfect and safe state during its operating period.

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Gas Quality Analyzer
GasLab Q2
3 Measurement concept of GasLab Q2
3.1 Description of main features
The Elster GasLab Q2 is a real-time natural gas analyzser. It determines the calorific value,
Wobbe index and other parameters in natural gas. The applications of the device range from fiscal
energy metering to measurement, control and regulation.
One major application is control of the gas turbine of power plants to optimize efficiency, pollutant
emissions and system load with fluctuating gas qualities. Another application is gas blending for
managing the gas specifications in transportation.
The flameless device quickly, continuously, and safely measures gas quality. The correlative
measuring principle of the GasLab Q2 is based on the determination of the infrared absorption
and thermal conductivity of the gas to be analyzed.
The GasLab Q2 is designed to operate in many hazardous areas and wide ambient temperature
ranges. This simplifies installation and allows the analyzer to be placed close to the process
supporting a short response time.
In measurement mode, the gas quality calculations are updated every second. To minimize gas
transport delays between the sample tap and GasLab Q2, a bypass flow meter is integrated into
the housing.
Routine calibration is performed automatically at a user-programmed time and day, using a simple
binary mixture.
The analyzer has gas connections for sample gas, calibration gas, measurement (sensor) outlet
and (optional used) bypass outlet. Electrical connections for power and I/O communications are
conveniently accessible in the top housing.
The measured values are communicated via Modbus protocol and analog outputs. Modbus is
available through two serial ports and the Ethernet interface.
Additionally it is possible to connect external signals to monitor contact closures, e.g. low pressure
limit of calibration gas cylinder.
The integrated interactive display, with touch functionality, shows the measurement values and
operating conditions of the analyzer.
The analyzer can be operated via the touch panel or by using a web browser connected to the
device. Archives such as error lists and logbook are intregrated. Furthermore, signal and message
warnings can be generated.
In addition, the computer software enSuite can be used for configuration, data display and
management of the records.
The basic specifications and further information See chapter 10
and by consulting the type plates and metering ranges on the device.

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3.2 Description of the operating principle
The operating principle is based on the context of the gas quality characteristics heating value,
density at base conditions (rho) and carbon dioxide content with various physical quantities of the
gas. Simpler detectable gas parameters are measured instead of the required target gas
parameters. These gas parameters are consistent with the target gas parameters in a physical
context.
The following parameters were selected for this process:
infrared (IR) transmission of CH-gas
Infrared (IR) transmission of CO2 gas
Heat conductivity of the complete gas
Pressure and temperature of the gas
To measure these parameters, the measuring unit includes an infrared sensor to measure the
absorption of the hydrocarbons and carbon dioxide contained in the natural gas. In addition, a
further sensor detects the heat conductivity of the full mixture of the natural gas. With the
additional information from the heat conductivity detector infrared inactive components, like
Nitrogen, can be determined. By dividing the gas flow into two channels, these two sensors are
measuring the gas in parallel.
Furthermore, the pressure and temperature are measured. The target values are determined
using a special calculation. Even the Wobbe index can be calculated from target values. The
physical background for the successful description of the gas properties by only three parameters
is in the typical composition of natural gas.
All three measurements are subjected to a correlative evaluation and provide as a result of the
heating value, the density at base conditions and the CO2 content of natural gas. These sizes
are required to determine the other properties of the natural gas. The figure shows the operating
principle in a schematic overview (without pressure and temperature).
Figure 3.1: Operating principle
The infrared measuring method is based on the fact that gas molecules oscillate in the irradiation
of natural gas with white light; this light is weakened at certain wave-lengths in the infrared spectral
range.
Each IR-active oscillating connection in the molecules makes a contribution to the absorption of
light. The different connections cause different absorptions in specific spectral ranges to the
absorption spectrum. The kind of absorption and its spectral distribution gives a view of the
composition of the gas. See figure 3.2.

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Figure 3.2: Infrared measurement principle
All significant hydrocarbon components in typical natural gas can be detected by IR absorption.
The contribution of the hydrocarbon content can be determined for gas specifications such as gas
heating value, density or heat conductivity, by using the IR absorption.
The method additionally uses a thermal conductivity detector (TCD) in parallel. This is a
microsystem-technical device and sensitive to all gas components. It also captures the nitrogen
contribution. The figure below outlines the principle.
Figure 3.3: TCD measuring method
The thermal conductivity
detector includes a heated
element (membrane) that heats
a second element (base) by
using the heat conduction of the
gas mixture. The gas mixture to
be tested has a lower or higher
thermal conductivity, depending
on the composition of the gas
mixture, so that the sensing
element (base) is more or less
altered in its temperature. The
temperature change also
therefore results in a change in
the electrical circuit (current
voltage resistance). These
changes will be evaluated and
analysed.
A system of equations can be set up together with the IR measurements, which provide the
contribution of the components CO2 and CH to heat conductivity and the normalization condition
for three-component gas. The searched hydrocarbon fraction xCH is found through the solution.
This means that all relevant gas components are described directlyor indirectly through measured
variables.

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3.3 System setup
A typical setup consists of a sample line from the gas pipeline to the analyzer. The measurement
is made rapidly and continuously. A gas stream is fed to the measuring device from the pipeline,
measured and fed into the exhaust tube. If the pipeline pressure is higher than the maximum inlet
pressure of the Q2, a pressure reduction must be set before the gas inlet for process gas.
The operational calibration gas is normally located close to the Q2. It is supplied by a 10 l cylinder
with a pressure reducer and provides the measuring accuracy. This gas supplies last for several
years of service, and the calibration gas is also available in other sizes of cylinders upon request.
The exhaust tubing should be laid separately, details see chapter 5.3.5. In general, all tubing and
components should be assembled as fixed gear. The power supply and the communication cables
should be connected and installed as usual in an industrial environment. The following diagram
shows a typical system setup:
Figure 3.4: General system setup
Power
Earth
Sample line
Data lines
Vent to safe
area tested gas
Pipe line
Calibration
gas bottle
Sample probe
Vent to safe area bypass gas
Calibration gas
Process gas
Breather vent to safe area (optional)

4
Structure of GasLab Q2
Page 20 of 135
Gas Quality Analyzer
GasLab Q2
4 Structure of GasLab Q2
The entire Q2 measurement system is completely integrated in a two-part aluminum housing.
Both housing parts are connected mechanically by screws and electrically by a cable bushing.
From a functional perspective, the hardware can be divided into three areas; the instrumentation
area (highlighted yellow in the following overview), the connection area (highlighted orange) and
the user operating interface highlighted in green (HMI).
Figure 4.1: Overview of functional areas
The connection area forms the interface to external connection ports, such as gas management
and electrical access.
The instrumentation area includes the fixed structure with functional modules. It provides Elster
staff access for production and service issues.
The human machine interface (HMI) is the operating interface for the user.
This areas are explained in more detail in the following sections.