LDS6 Laser Gas Analyzer Catalog Specification Sheet

© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
■ Overview
LDS 6 is a diode laser gas analyzer with a measuring principle
based on the specific light absorption of different gas components. LDS 6 is suitable for fast and non-contact measurement
of gas concentrations in process or flue gases. One or two signals from up to three measuring points are processed simultaneously by the central analyzer unit. The in-situ cross-duct sensors
at each measuring point can be separated up to 700 m from the
central unit by using fiber-optic cables. The sensors are designed for operation under harsh environmental conditions and
contain a minimum of electrical components.
■ Application
Applications
• Process optimization
• Continuous emission monitoring for all kinds of fuels
(oil, gas, coal, and others)
• Process measurements in power utilities and any kind of
incinerator
• Process control
• Explosion protection
• Measurements in corrosive and toxic gases
• Quality control
• Environmental protection
• Plant and operator safety
Sectors
• Power plants
• Steel works
• Cement industry
• Chemical and petrochemical plants
• Automotive industry
• Waste incinerators
• Glass and ceramics production
• Research and development
• Semiconductor production
LDS 6, typical installation with cross-duct sensors
■ Benefits
The in-situ gas analyzer LDS 6 is characterized by a high availability and unique analytical selectivity, and is optimally suitable
for numerous applications. LDS 6 enables the measurement of
one or two gas components or - if desired - the gas temperature
directly in the process:
• With high dust load
• In hot, humid, corrosive, explosive, or toxic gases
• In applications showing strong varying gas compositions
• Under harsh environmental conditions at the measuring point
• Highly selective, i.e. mostly without cross-sensitivities
Special applications
In addition to the standard applications, special applications are
available upon request. These contain both an expansion of the
temperature and pressure range, as well as an expansion of the
concentration measuring range. Furthermore, other gas species
can be measured using special applications.
LDS 6 properties:
• Little installation effort
• Minimum maintenance requirements
• Extremely rugged design
• High long-term stability through built-in, maintenance-free
reference gas cell, field calibration is unnecessary
• Real-time measurements
Moreover, the instrument provides warning and failure
messages upon:
• Need for maintenance
- Erroneous reference function
- Bad signal quality
• Violation of a lower or upper alarm level for the measured
variable
• Transmitted amount of light violating an upper or lower limit
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© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
■ Design
The gas analyzer LDS 6 consists of a central unit and up to three
in-situ sensors. The connection between the central unit and the
sensors is established by a so-called hybrid cable, which contains optical fibers and copper wires. An additional cable connects the transmitter and receiver parts of the cross-duct sensor.
2
Central unit
The central unit is housed in a 19" rack unit housing with 4 fixing
points for mounting:
• In a hinged frame
• In racks with or without telescopic rails
Display and control panel
• Large LCD field for simultaneous display of measurement
result and device status
• Contrast of the LCD field is adjustable via the menu
• LED background illumination of the display with
energy-saving function
• Easy-to-clean membrane touch pad with softkeys
• Menu-driven operation for parameterization and diagnostics
• Operation support in plain text
LED-backlit graphic
display and membrane
tactile-touch keyboard
Inputs and outputs
• One to three measurement channels with hybrid connections
for the sensors at the measuring points
• 2 analog inputs per channel for process gas temperature and
pressure
• 2 analog outputs per channel for gas concentration(s). For selected versions, the transmission can be read out as an alternative.
• 6 freely configurable binary inputs per channel for signaling
faults or maintenance requests from external temperature or
pressure transducers or sensor purging failure.
• 6 freely configurable binary outputs per channel (signaling of
fault, maintenance requirements, function control, transmission limit alarm, concentration limit alarm, store analog output)
Communication
Network connection: Ethernet (T-Base-10) for remote diagnostics and maintenance.
Status line to indicate
the device status
Two code levels
according to NAMUR
Menu-driven
operator control
with five softkeys
Physical unit of the
sample gas component
Numeric display
of concentrations
ESC key
to cancel entries
Numeric keypad
for entering digits
INFO key
for help in plain text
CLEAR key
to delete the
digits entered
LDS 6 central unit, membrane keyboard and graphic display
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ENTER key
to adopt
the numbers
MEAS key
to return direct to
measurement mode
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
Cross-duct sensors
Parts in contact with the process gas
The sensors normally do not come into contact with the process
gas, since purging with a gaseous media is applied at the process side. Stainless steel purging gas tubes in front of the sensor
windows immerse slightly into the process gas and thus limit the
purging volume. Special materials such as Hastelloy and plastics (PP) are available on request.
Hybrid and sensor cables
A combination of fiber-optic cables and twisted copper wires
connects the sensors to the central unit. The hybrid cable connects the central unit with the detector unit of the sensor, the sensor cable connects the transmitter and receiver units of the sensor.
Sensor CD 6, transmitter or detector unit
• In-situ cross-duct sensors, configured as transmitter and
detector unit, connected via sensor cable
• Connection to the LDS 6 central unit via a so-called hybrid
cable of max. 700 meters in length (total hybrid and sensor
connecting cable length: max. 250 m in Ex Zone 0 and Ex
Zone 1)
• Stainless steel, some painted aluminum
• IP65 degree of protection for sensor
• Adjustable flanges with flange connection
• DN 65/PN 6, ANSI 4"/150 lbs
• Optional flameproof window flanges with dimensions:
DN 65/PN 6, DN 80/PN 16, ANSI 4"/150 lbs, other process
interfaces available on request
• Purging facilities on the process and the sensor sides,
configurable application with purging gas connections for:
- Instrument air
- Purging air blower
- Steam
- Nitrogen
- Process gases to which the pressure equipment directive
cat. 2 does not apply
• In combination with high-pressure window flanges, process
purging can be done using instrument air or nitrogen
• Quick release fasteners for cleaning the measurement openings and the sensor window
• Optional: Version with explosion protection in accordance with
ATEX / IEC Ex ia
• Sensor type CD 6 is compliant with the pressure equipment
directive
For installation in Ex-protected environments, the legislative regulations have to be complied with, such as the spatial separation
of intrinsically-safe from non-intrinsically-safe cables.
In compliance with standard EN IEC 60079-14, systems with intrinsically-safe circuits must be installed such that their intrinsic
safety is not impaired by electric or magnetic fields. Therefore
the hybrid and sensor cables of the LDS 6 in an Ex application
must be routed in such a way that they cannot generate electric
or magnetic fields, e.g. by coiling them in more than one cable
loop. To guarantee a good signal quality and to avoid impermissible inductance loops, the hybrid and sensor cables should be
kept as short as possible.
• The distance between central unit and measuring point can
be
- up to 250 m for Ex units when used in Zone 0 and Zone 1
(total hybrid and sensor connecting cable length)
- up to 700 m for Ex units used in Zone 2 and for non-Ex units
• Hybrid and sensor cables
- Multimode fiber-optic cable, provided with SMA connections
for transmission of the measured signal
- Two-wire copper cable, in twisted pair version, for +24 V
supply of the detector electronics (+12 V in the case of Exsuitable instruments)
• Additionally for the hybrid cable:
- Single-mode fiber-optic cable, configured double-sided with
E2000 connectors for transmission of laser light
• Rugged cable sheath for laying in open cable ducts or ductworks
• Sheath material: oil-resistant polyurethane
Connections of the hybrid cable
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© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
■ Function
Operating principle
2
LDS 6 is a gas analyzer employing single-line molecular absorption spectroscopy. A diode laser emits a beam of near-infrared
light, which passes through the process gas and is detected by
a receiver unit. The wavelength of the laser diode output is tuned
to a gas-specific absorption line. The laser continuously scans
this single absorption line with a very high spectral resolution.
Central unit
The result is a fully resolved single molecular line which is analyzed in terms of absorption strength and line shape. The influence of cross-sensitivities on the measurement is negligible,
since the quasi-monochromatic laser light is absorbed very selectively by only one specific molecular line in the scanned
spectral range.
Hybrid cables
Measurement path
Laser light
P1
Electrical signals
Measured
volume
Reflected LED light
Channel 1
CPU and
display
Laser
control
Signal
processing
Diode
laser
E/O
P2
E/O
P0
E/O
Measured
volume
Optocoupler
Channel 2
E/O
E/O
PR
Reference
cell
P3
Measured
volume
Channel 3
E/O
Basic design of the LDS 6
Configuration examples
A feature of the in-situ analytical procedure is that the physical
measurement takes place directly in the stream of process gas,
and usually also directly in the actual process gas line. All process parameters such as gas matrix, pressure, temperature,
moisture, dust load, flow velocity and mounting orientation can
influence the measuring properties of the LDS 6 and must therefore be systematically investigated for each new application.
A feature of the standard applications defined in the ordering
data of the LDS 6 is that the typical process conditions are wellknown, documented, and the guaranteed measuring properties
can be proven by reference installations. If you cannot find your
application among the standard applications, please contact
Siemens. We will be pleased to check your possible individual
application of the LDS 6. You can find an application questionnaire on the LDS 6 product sites on the Internet:
www.siemens.com/insituquestionnaire
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Siemens AP 01 · 2015
Central unit
Process flange
Transmitter unit
Hybrid cable
Gas concentration
Flue gas
composition
Steam
Dust load
Gas velocity
Gas temperature
Gas pressure
Receiver
Measurement
path length
Sensor connecting cable
Supplementary channel (option)
Supplementary channel (option)
Typical transmitted light setup of LDS 6, in-situ
To avoid contamination of sensor optics on the process side,
clean gaseous purging media such as instrument air, N2 or
steam are used. Purging air tubes on the sensor heads, which
slightly penetrate into the process gas stream, define the effective measuring path length.
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
The LDS 6 can measure in both the transverse and longitudinal
directions of the process gas flow. In certain cases, the process
conditions make it necessary to condition the sample gas
stream in a bypass line with respect to process temperature,
pressure and/or optical path length. Further treatment of the process gas, such as drying or dust precipitation, is usually unnecessary.
In some specific cases, two components can be measured simultaneously if their absorption lines are so close to each other
that they can be detected within the laser spectrum by one single scan (for example water (H2O) and ammonia (NH3)).
Hybrid cable
Supplementary
channel (option)
Supplementary
channel (option)
Sensor connecting cable
Transmitter unit
Central unit
Sample
gas
inlet
Temperature
sensor
Sample gas
outlet
Receiver
Transmitter unit
Heating
(option)
Sample gas inlet
Sensor connecting cable
Supplementary
channel (option)
Supplementary
channel (option)
1+SSP
A flow cell is available by special application for the LDS 6 which
has been specially optimized for use with the LDS 6 and its
transmitted-light sensors with respect to handling and measuring performance. It is designed to reduce surface effects, and is
therefore also highly suitable for polar gases like ammonia. This
flow cell is available in heated and non-heated versions. Wheel
mounted and wall mounted versions are available.
Hybrid cable
2
+2
Typical transmitted light setup of LDS 6, in bypass
Central unit
Pump
Receiver
Absorption spectra of water and ammonia
Typical measurable gases for LDS 6 are:
• Oxygen (O2) for low and high pressure
• Hydrogen fluoride (HF) + water
• Hydrogen chloride (HCl) + water
• Ammonia (NH3) + water
• Water vapor (H2O)
• Carbon monoxide (CO)
• Carbon dioxide (CO2)
• CO + CO2
By using an internal reference cell normally filled with the gas
measured, the stability of the spectrometer is permanently
checked in a reference channel.
By doing so, the continuous validity of the calibration is ensured
without the need to carry out external recalibration using bottled
calibration gases or reference gas cells.
$EVRUSWLRQOLQH
Measuring configuration of LDS 6 with heated flow cell
General information
LDS 6 is connected to the measuring points by fiber optics. The
laser light is guided by a single-mode fiber from the central unit
to the transmitter unit of the in-situ sensor. The sensor consists of
a transmitter and a receiver; the distance between them defines
the measurement path. In the receiver box, the light is focused
onto a suitable detector. The detector signal is then converted
into an optical signal and transmitted via a second optical fiber
to the central unit, where the concentration of the gas component is determined from the detected absorption signal.
LDS 6 usually measures a single gas component by means of
the absorption capacity of a single fully resolved molecular absorption line. The absorption results from conversion of the radiation energy of the laser light into the internal energy of the molecule.
/DVHUOLQH
Typical spectral bandwidth of an absorption line compared to the bandwidth of the laser light.
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© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
2
Influences on the measurement
Maintenance and fault messages
Dust load
LDS 6 outputs different warnings via relays:
• Need for maintenance (measured value is not influenced)
• Operating error (measured value might be influenced)
As long as the laser beam is able to generate a suitable detector
signal, the dust load of the process gases does not influence the
analytical result. By applying a dynamic background correction,
measurements can be carried out without any negative impact.
Under good conditions, particle densities up to 100 g/Nm3 (distance 1 m) can be handled by the LDS 6. Varying dust loads are
compensated by scanning the laser over the gas absorption line
and the current background.
The effect of a high dust load is complex and depends on the
path length and particle size. The optical damping increases at
longer path lengths. Smaller particles also have a large influence
on the optical damping. With a combination of high dust load,
long path length and small particle size, the technical support at
Siemens should be consulted.
Temperature
The effect of temperature on the absorption strength of the
molecule line is compensated by a correction factor. A temperature signal can be fed into an analog instrument from an external
temperature sensor. This signal is then used to correct the influence of the temperature on the observed line strength. If the temperature of the sample gas remains constant, it is alternatively
possible to carry out a static correction using a preset value.
At high process gas temperatures, generally from approximately
1 000 °C, there may be noticeable broadband IR radiation of gas
and dust, or flames may occasionally occur in the measurement
path. An additional optical bandpass filter can be set upstream
of the detector to protect it and prevent saturation by the strong
background radiation.
Pressure
The effect of pressure on the absorption line, and consequently
on the measured concentration, is compensated with a correction factor. The gas pressure can affect the line shape of the molecular absorption line. An analog pressure signal can be sent to
the device from an external pressure sensor to fully compensate
for the effect of the pressure including the density effect.
Optical path length
The absorption values analyzed by the LDS 6 are typically small.
As a result of Beer-Lambert’s law, the absorption of laser light depends on the optical path length within the gas, among other
factors. Therefore, the precision in determining the effective optical path length in the process might limit the overall precision
of the measurement.
As the sensor optics on the process side normally need to be
purged to keep them clean over a long period of time, the thickness of the mixing zone between the purging medium and the
process gas and its concentration distribution need to be considered. In a typical in-situ installation directly in the line and with
some meters of path, the influence of the purging gas on the effective path length can be neglected.
Path length and dust load are mutually influencing: the higher
the dust load in the process, the shorter the max. possible path
length. For short path lengths in the range ≤ 0.3 m, contact
Siemens Technical Support.
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Siemens AP 01 · 2015
Note
Individual requirements for the measuring point can make the
utilization of special sensor equipment necessary. The possibilities for adapting the sensors are:
• Different purging media, such as instrument air, ambient air,
nitrogen or steam
• Different purging modes on process and sensor sides
• Special materials of purging tubes and/or sensor flanges
• Cooling or heating of the sensors
• Explosion-protected sensor configurations
Essential characteristics
• Integrated calibration adjustment with an internal reference
cell
• Negligible long-term drifts of zero and span
• Dynamic background correction for varying dust loads
• Isolated signal outputs, 4 to 20 mA
• User-friendly, menu-driven operation
• Selectable time constants (response time)
• Two user levels with individual access codes for prevention of
unwanted and unauthorized operations
• Operation according to NAMUR recommendations
• Monitoring of overall optical transmission
• Remote preventive maintenance and servicing via
Ethernet/modem
• Straightforward replacement of the central unit, since connections can easily be removed
• Sensor and central unit housing free of wear and corrosion
• Easy operation with a numerical keypad and menu prompting
Certified versions for emission monitoring
The LDS 6 is available as certified instrument for emission monitoring of NH3, NH3/H2O, H2O, HCl, HCl/H2O. The certificates
are issued by TÜV for Germany and MCERTS for the United
Kingdom. Test kits for ammonia, water and HCl should be used
to conduct regular calibration and linearity checks on site. These
kits can be ordered separately as instrument accessories. For
new analyzer orders, the NH3, NH3/H2O and H2O kits named
"Version 2" must be ordered. For already installed analyzers,
please contact Siemens Technical Support for spotting the correct kit version, or consult the instrument manual.
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
Verification of calibration
Assembly with certified, maintenance-free calibration gas cell
with connections for laser fiber-optic conductors and detector
module of cross-duct sensor. These are used to rapidly verify the
factory calibration in the field without compressed gas bottles
and flow cell.
Calibration verification kits are available for the following sample
gases: O2 (application codes AA, AC), NH3, CO, CO2, CO/CO2.
A "Zero gas test kit" is also available. (see "Additional units")
2
Example of an assembly for verification of calibration
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© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
■ Technical specifications
Electrical characteristics
Analytical performance
2
Power supply
Depending on sample gas component: see table for standard
applications.
For application code ET and FT:
in accordance with the requirements of 17th and 27th BImSchV
100 ... 240 V AC 50 ... 60 Hz,
automatically adapted by the system; with a 3-channel central unit,
an additional external power supply +24 V DC, 50 VA is included
in the scope of delivery
Power consumption
50 W
EMC
According to EN 61326 and standard classification of NAMUR
NE21
Depending on sample gas component: see table for standard
applications.
Electrical safety
According to EN 61010-1,
overvoltage classification II
Fuse specifications
100 ... 240 V: T2.5L250V
Measuring range
Depending on sample gas component: see table for standard
applications.
Detection limit (DL):
Calculated in accordance with
VDI 2449, measured on every supplied analyzer during the temperature test (between 5 ... 45 °C) in
accordance with VDI 4203.
Smallest recommended measuring
range (with 1 m path length)
The maximum applicable measuring ranges can be found in the table
of standard combinations. These can only be applied if the individual
process conditions allow it. Please contact the Technical Support from
Siemens for checking the applicability.
Accuracy1)
2 % / 5 %, depending on sample
gas component and application
code. At best: detection limit. See
table for standard applications.
For application code ET and FT:
in accordance with the requirements of 17th and 27th BImSchV
Linearity
Better than 1 %
Repeatability
2 % of the measured value or
same amount as the minimum
detection limit (whichever is largest)
For application code ET and FT:
in accordance with the requirements of 17th and 27th BImSchV
Calibration interval
No recalibration required thanks
to internal reference cell
General information
Dynamic response
Warm-up time at 20 °C ambient
temperature
Approx. 15 min
Response time
Min. of 1 s, depending on application
Integration time
1 … 100 s, adjustable
Influencing variables
Ambient temperature
< 0.5 %/10 K of the measured
value
Atmospheric pressure
Negligible
Process gas pressure compensation
Recommended
Process gas temperature compensation
Recommended
Process gas pressure range
See table for standard applications
Power supply changes
< 1 %/30 V
Electrical inputs and outputs
Concentration units
ppmv, Vol%, mg/Nm3
Number of measurement channels
1 … 3, optional
Display
Digital concentration display
(5 digits with floating decimal
point)
Analog output
2 per channel, 4 ... 20 mA, floating, ohmic resistance max. 750 Ω
Analog inputs
Laser protection class
Class 1, safe to the eye
2 per channel,
designed for 4 ... 20 mA, 50 Ω
Certificates
CE marking, TÜV, MCERTS
Binary outputs
6 per channel, with changeover
contacts, configurable, 24 V
AC/DC/1 A, floating
Degree of protection
IP20 according to EN 60529
Binary inputs
Dimensions
177 x 440 x 380 mm
6 per channel, designed for 24 V,
floating, configurable
Weight
Approx. 13 kg
Communication interface
Ethernet 10BaseT (RJ-45)
Horizontal
Climatic conditions
Design, enclosure
Mounting
Temperature range
5 … 45 °C during operation,
-40 … +70 °C during storage
and transportation
Atmospheric pressure
800 … 1 200 hPa
Humidity
< 85 % relative humidity,
above dew point
(in operation and storage)
1)
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Siemens AP 01 · 2015
The accuracy corresponds to intrinsic uncertainty according to IEC 61207
for 7MB6121-xKD00-0xxx
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
Selection and ordering data
Article No.
7MB6121- 7 7 7 0 7 - 0 7 7 7
LDS 6 in-situ gas analyzer
19" rack unit for installation in cabinets
Click on the Article No. for the online configuration in the PIA Life Cycle Portal.
Explosion protection
Without, not suitable for connection to Ex sensors
Without, suitable for connection to Ex sensors in accordance
with II 1 G Ex ia op is IIC T4 Ga, II 1 D Ex ia op is IIIC T135 °C Da
Measured component
0
1
2
O2
Possible with application code
of the respective channel
B, C, P
A
NH3
NH3/H2O
A, E, F, T
A, E, F, T
C
D
HCl
HCl/H2O
A, H, T
A, H, T
E
F
HF
HF/H2O
A, H
A, H
G
H
CO
CO/CO2
C
D
J
K
CO2
H2O
A
A, T
L
M
Application code of
measured component channel 1
A
B
Application examples channel 11)
Emission monitoring, non-certified
Emission monitoring, combustion
optimization
A
B
C
D
Safety monitoring with appropriate
plant concept
Process control
E
F
SNCR-DeNOx
SCR-DeNOx
E
F
H
L
Filter optimization
Automotive, for use according EU regulation
No. 595/2009/EC from June 18, 2009 (EURO VI)
Process control (high pressure)
H
L
Emission monitoring, QAL1 according
EN 15267-3 (TÜV and MCERTS), in combination with measured component variants
C, D, E, F, M
T
C
P
T
CD 6, sensor alignment kit
With
Without
Application code of
measured component channel 2
X
A
B
D
P
0
1
Application examples channel 21)
Channel 2 not used
Emission monitoring
Combustion optimization
X
A
B
C
D
Safety monitoring with appropriate
plant concept
Process control
E
F
SNCR-DeNOx
SCR-DeNOx
E
F
H
L
Filter optimization
Automotive, for use according EU regulation
No. 595/2009/EC from June 18, 2009 (EURO VI)
Process control (high pressure)
H
L
Emission monitoring, QAL1 according
EN 15267-3 (TÜV and MCERTS), in combination with measured component variants
C, D, E, F, M
T
C
P
T
1)
D
P
The examples shown represent possible applications where appropriately configured LDS 6 solutions can be used. The user is responsible for the prevailing
conditions (plant concept (possibly redundant), application of appropriate components required in addition, compliance with possible directives, etc.).
Siemens AP 01 · 2015
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© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
Selection and ordering data
Article No.
7MB6121- 7 7 7 0 7 - 0 7 7 7
LDS 6 in-situ gas analyzer
19" rack unit for installation in cabinets
Application code of
measured component channel 3
2
X
A
B
Application examples channel 31)
External 24 V DC power supply
included in scope of delivery
Channel 3 not used
Emission monitoring
Combustion optimization
X
A
B
C
D
Safety monitoring with appropriate
plant concept
Process control
E
F
SNCR-DeNOx
SCR-DeNOx
E
F
H
L
Filter optimization
Automotive, for use according EU regulation
No. 595/2009/EC from June 18, 2009 (EURO VI)
Process control (high pressure)
H
L
Emission monitoring, QAL1 according
EN 15267-3 (TÜV and MCERTS), in combination with measured component variants
C, D, E, F, M
T
C
P
T
D
P
Language (supplied documentation, software)
German
English
French
Spanish
Italian
Selection and ordering data
Additional versions
Add "-Z" to Article No. and specify Order code
Telescopic rails (2 units)
Set of Torx tools
TAG labels (customized inscription)
Additional units
Optical band-pass filter for suppressing IR background radiation (flame filter)
External power supply for hybrid cable length > 500 m
Calibration verification kit for NH3 (version 2)
TÜV/MCERTS linearity verification kit NH3 (version 2), 2 cells
TÜV/MCERTS linearity verification kit NH3/H2O (version 2), 3 cells
TÜV/MCERTS linearity verification kit H2O (version 2), 2 cells
Calibration verification kit for NH3 (version 1)
TÜV/MCERTS linearity verification kit NH3 (version 1), 2 cells
TÜV/MCERTS linearity verification kit NH3/H2O (version 1), 3 cells
TÜV/MCERTS linearity verification kit H2O (version 1), 2 cells
TÜV/MCERTS linearity verification kit HCl, 2 cells
TÜV/MCERTS linearity verification kit HCl/H2O, 3 cells
TÜV/MCERTS linearity verification kit H2O (only for HCl/H2O analyzers), 5 cells
TÜV/MCERTS linearity verification kit H2O (only for NH3/H2O analyzers), version 1,
5 cells
TÜV/MCERTS linearity verification kit H2O (only for NH3/H2O analyzers), version 2,
5 cells
TÜV/MCERTS linearity verification kit HCl, 5 cells
TÜV/MCERTS linearity verification kit NH3, version 1, 5 cells
TÜV/MCERTS linearity verification kit NH3, version 2, 5 cells
Linearity verification kit NH3 (version 2), 10 cells2)
Calibration verification kit for O2 (only for application codes AA, AC and AD)
Calibration verification kit for CO
Calibration verification kit for CO2
Calibration verification kit for CO/CO2
Zero gas verification kit for all gases except O2
1)
0
1
2
3
4
Order code
A31
A32
Y30
Article No.
A5E00534668
A5E00854188
A5E01075594
A5E00823339013
A5E00823339014
A5E00823339015
A5E00534675
A5E00823339003
A5E00823339004
A5E00823339005
A5E00823339008
A5E00823339009
A5E00823339007
A5E00823339002
A5E00823339012
A5E00823339006
A5E00823339001
A5E00823339011
A5E03693426
A5E01143755001
A5E01143755003
A5E01143755004
A5E01143755006
A5E00823386009
The examples shown represent possible applications where appropriately configured LDS 6 solutions can be used. The user is responsible for the prevailing
conditions (plant concept (possibly redundant), application of appropriate components required in addition, compliance with possible directives, etc.).
2)
In combination with the LDS 6 applications CL/DL suitable to measure NH3 according to the requirements of "Regulation No. 595/2009/EC on type-approval
of motor vehicles and engines with respect to emissions from heavy duty vehicles (EURO VI) from June 18, 2009 and its implementation standard the regulation 582/2011/EC from May 25, 2011” of the Commission of the European Community.
2/12
Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
■ Dimensional drawings
s
101.6
178
2
LDS 6
355
465
483
428
351.5
177
432
437
483
440
LDS 6, 19" central unit, dimensions in mm
Siemens AP 01 · 2015
2/13
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
■ Schematics
Pin assignments
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LDS 6, 19" central unit, pin assignments
2/14
Siemens AP 01 · 2015
&RQWDFWORDG
PD[9$$&'&
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
Optical and electrical connections
25-pin connector:
Binary inputs and
relay outputs
15-pin connector:
Binary inputs and
analog inputs/outputs
2
Ethernet
converter
RJ-45
Power supply
and fuses
Hybrid cable
support
E2000
single mode
opto-connector
SMA
multimode
opto-connector
24 V DC
sensor
supply
LDS 6, three-channel 19" central unit, optical and electrical connections
Siemens AP 01 · 2015
2/15
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
■ More information
The following table lists the measuring conditions for standard
applications. The listed values for the measuring range and detection limit (DL) are only approximate values. The exact values
at the respective measuring point depend on the totality of all influencing variables and can be determined by Siemens for the
specific case.
2
Standard application
Effective optical path
length: 0.3 … 12 m
Dust load2):
< 50 g/Nm3
Process gas
temperature
Tmin … Tmax
Gas Gas Gas Appl.
1
2
code code
A
O2
C
NH3
NH3 H2O D
E
HCl
HCl
H2O F
Min.
measuring
range
(with 1 m eff.
opt. path
length)
Max. measuring (Max. measurrange
ing range x
(also dependent path length)
on eff. opt. path
length:
see following column)
(DL x path
length)
under standard conditions1)
without
cross-interference of
other gases
(DL x path Acculength)
racy3)
at 1 013 hPa
with crossinterference
of gas 2
Gas 1
Gas 1
Gas 1
Gas 1
Gas 1
Gas 1
B6)
600 … 1 200 °C 950 … 1 050 hPa 0 … 15 vol% 0 … 100 vol%
240 vol%*m
0.3 vol%*m
at 600 °C
5%
C
0 … 600 °C
950 … 1 050 hPa 0 … 5 vol%
0 … 100 vol%
75 vol%*m
0.1 vol%*m
2 %4)
P
0 … 200 °C
950 … 5 000 hPa 0 … 5 vol%
0 … 100 vol%
75 vol%*m
0.1 vol%*m
2%
A
0 … 150 °C
950 … 1 050 hPa 0 … 25 ppmv 0 … 500 ppmv
2 500 ppmv*m
0.5 ppmv*m
0.9 ppmv*m 2 %
at 15 vol%
H2O, 55 °C
T
0 … 150 °C
950 … 1 050 hPa 0 … 25 ppmv 0 … 500 ppmv
2 500 ppmv*m
0.5 ppmv*m
0.9 ppmv*m 2 %
at 15 vol%
H2O, 55 °C
E
250 … 350 °C
950 … 1 050 hPa 0 … 45 ppmv 0 … 500 ppmv
2 500 ppmv*m
0.9 ppmv*m
at 250 °C
1.4 ppmv*m 2 %
at 15 Vol%
H2O, 250 °C
F
300 … 400 °C
950 … 1 050 hPa 0 … 50 ppmv 0 … 500 ppmv
2 500 ppmv*m
1 ppmv*m
at 300 °C
1.5 ppmv*m 2 %
at 15 Vol%
H2O, 300 °C
L7)
0 … 400 °C8)
920 … 1 120 hPa 0 … 15 ppmv 0 … 500 ppmv
2 500 ppmv*m
0.5 ppmv*m
1.4 ppmv*m 2 %
at 15 Vol%
H2O, 250 °C
A
0 … 150 °C
950 … 1 050 hPa 0 … 25 ppmv 0 … 100 ppmv
1 200 ppmv*m
0.5 ppmv*m
0.9 ppmv*m 2 %
at 15 vol%
H2O, 55 °C
T
0 … 150 °C
950 … 1 050 hPa 0 … 25 ppmv 0 … 100 ppmv
1 200 ppmv*m
0.5 ppmv*m
0.9 ppmv*m 2 %
at 15 vol%
H2O, 55 °C
E
250 … 350 °C
950 … 1 050 hPa 0 … 45 ppmv 0 … 100 ppmv
1 200 ppmv*m
0.9 ppmv*m
at 250 °C
1.4 ppmv*m 2 %
at 15 vol%
H2O, 250 °C
F
300 … 400 °C
950 … 1 050 hPa 0 … 50 ppmv 0 … 100 ppmv
1 200 ppmv*m
1 ppmv*m
at 300 °C
1.5 ppmv*m 2 %
at 15 vol%
H2O, 300 °C
L7)
0 … 400 °C8)
920 … 1 120 hPa 0 … 15 ppmv 0 … 100 ppmv
1 200 ppmv*m
0.5 ppmv*m
1.4 ppmv*m 2 %
at 15 Vol%
H2O, 250 °C
A
0 … 150 °C
950 … 1 050 hPa 0 … 30 ppmv 0 … 6 000 ppmv 1 200 ppmv*m
0.6 ppmv*m
2.2 ppmv*m 5 %
at 15% H2O,
55 °C
T
120 … 210 °C
950 … 1 050 hPa 0 … 10 ppmv 0 … 60 ppmv
H
150 … 250 °C
950 … 1 050 hPa 0 … 50 ppmv 0 … 6 000 ppmv 1 200 ppmv*m
1.0 ppmv*m
at 150 °C
3.1 ppmv*m 5 %
at 15 Vol%
H2O, 150 °C
A
0 … 150 °C
950 … 1 050 hPa 0 … 30 ppmv 0 … 100 ppmv
1 200 ppmv*m
0.6 ppmv*m
2.2 ppmv*m 5 %
at 15% H2O,
55 °C
T
120 … 210 °C
950 … 1 050 hPa 0 … 10 ppmv 0 … 60 ppmv
720 ppmv*m
H
150 … 250 °C
950 … 1 050 hPa 0 … 50 ppmv 0 … 100 ppmv
1 200 ppmv*m
1.0 ppmv*m
at 150 °C
3.1 ppmv*m 5 %
at 15 vol%
H2O, 150 °C
Footnotes: See page 2/18.
2/16
Process gas
pressure
pmin … pmax
Please note that the values for the detection limit and the maximum measuring range refer to a path length of 1 m. Longer path
lengths will improve the detection limit, but not linearly. due to
limiting effects such as dust load. The maximum applicable
measuring ranges can only be used if permitted by the process
conditions such as dust load.
Siemens AP 01 · 2015
720 ppmv*m
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
Standard application
Effective optical path
length: 0.3 … 12 m
Dust load3): < 50 g/Nm3
Min. measuring
range
(with 1 m eff. opt.
path length)
Max. measuring range
(usually also
dependent on
eff. opt. path
length: see
following
column)
(Max.
measuring
range x
path
length)
(DL x path
length)
under
standard
conditions
(DL x path
Acculength)
racy4)
at 1 013 hPa
with crossinterference
of gas 1
Purging gas
mode
Gas 2
Gas 2
Gas 2
Gas 2
Standard
Optional
B6)
E, F
G, H
Steam +
air, N2
C
D
B
N2
P
D
B
N2
A
C
G
Air
T
C
G
Air
E
E
G
Air
F
E
G
Air
L
C
D
Air
Gas 1 Gas 2 Gas Appl. Gas 2
code code
A
O2
C
NH3
NH3
H2O
E
HCl
HCl
D
H2O
F
1) 2)
Gas 2
Purging
gas
medium
A
0 … 5 vol%
0 … 30 vol%
240 vol%*m 0.1 vol%*m
0.1 vol%*m
5%
C
G
Air
T
0 … 5 vol%
0 … 30 vol%
240 vol%*m 0.1 vol%*m
0.1 vol%*m
5%
C
G
Air
E
0 … 5 vol%
0 … 30 vol%
240 vol%*m 0.1 vol%*m
at 250 °C
0.1 vol%*m
at 250 °C
5%
E
G
Air
F
0 … 5 vol%
0 … 30 vol%
240 vol%*m 0.1 vol%*m
at 300 °C"
0.1 vol%*m
at 300 °C"
5%
E
G
Air
L
0 … 5 vol%
0 … 30 vol%
250 vol%*m 0.1 vol%*m
at 250 °C"
0.1 vol%*m
at 250 °C"
5%
C
D
Air
A
C
G
Air
T
C
G
Air
H
E
G
Air
C
G
Air
C
G
Air
E
G
Air
A
0 … 5 vol%
0 … 30 vol%
360 vol%*m 0.1 vol%*m
T
0 … 5 vol%
0 … 30 vol%
360 vol%*m
H
0 … 5 vol%
0 … 30 vol%
360 vol%*m 0.1 vol%*m
at 150 °C
0.1 vol%*m
5%
0.1 vol%*m
at 150 °C
5%
Footnotes: See page 2/19.
Siemens AP 01 · 2015
2/17
2
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
Standard application
Effective optical path
length: 0.3 … 12 m
Dust load2):
< 50 g/Nm3
2
Process gas
temperature
Tmin … Tmax
Gas Gas Gas Appl.
1
2
code code
G
HF
HF
H2O H
Process gas
pressure
pmin … pmax
Min.
measuring
range
(with 1 m eff.
opt. path
length)
Max. measuring (Max. measurrange
ing range x
(also dependent path length)
on eff. opt. path
length:
see following column)
(DL x path
length)
under standard conditions1)
without
cross-interference of
other gases
(DL x path Acculength)
racy3)
at 1 013 hPa
with crossinterference
of gas 2
Gas 1
Gas 1
Gas 1
Gas 1
0.6 ppmv*m 5 %
at 15 vol%
H2O, 55 °C
Gas 1
Gas 1
A
0 … 150 °C
950 … 1 050 hPa 0 … 5 ppmv
0 … 1 500 ppmv 200 ppmv*m
0.1 ppmv*m
H
150 … 250 °C
950 … 1 050 hPa 0 … 5 ppmv
0 … 1 500 ppmv 200 ppmv*m
0.11 ppmv*m 0.6 ppmv*m 5 %
at 150 °C
at 15 vol%
H2O, 150 °C
A
0 … 150 °C
950 … 1 050 hPa 0 … 5 ppmv
0 … 200 ppmv
200 ppmv*m
0.1 ppmv*m
H
150 … 250 °C
950 … 1 050 hPa 0 … 5 ppmv
0 … 200 ppmv
200 ppmv*m
0.11 ppmv*m 0.6 ppmv*m 5 %
at 150 °C
at 15 vol%
H2O, 150 °C
300 ppmv*m 1 500 ppmv 2 %
*m
at 50 vol%
CO2, 20 °C
0.6 ppmv*m 5 %
at 15 vol%
H2O, 55 °C
CO
J
C
0 … 600 °C
950 … 1 050 hPa 0 … 1.5 vol% 0 … 100 vol%
40 vol%*m
CO
CO2 K
D
0 … 400 °C
800 …1 400 hPa 0 … 5 vol%
0 ... 200 vol%*m 0,1 vol%*m
CO2
L
A
0 … 150 °C
950 … 1 050 hPa 0 … 7.5 vol% 0 … 100 vol%
40 vol%*m
300 ppmv*m
2%
H2O
M
A
0 … 150 °C
950 … 1 050 hPa 0 … 5 vol%
0 … 30 vol%
240 vol%*m
0.1 vol%*m
5%
T
0 … 150 °C
950 … 1 050 hPa 0 … 5 vol%
0 … 30 vol%
240 vol%*m
0.1 vol%*m
5%
0 … 100 vol%
0.5 Vol%
at 50 vol%
CO2, 20 °C
2 %5)
1)
All technical data apply to an optical path distance of 1 m in a nitrogen atmosphere under standard conditions 25 °C (or Tmin) and 1 013 hPa. The effective
detection limit, the measuring range and the accuracy can be influenced by process parameters such as pressure, temperature and gas composition. Not all
combinations of maximum pressure and temperature can be realized with the minimum measuring ranges. If the process conditions deviate from the specifications of the standard applications, special applications are also possible on request.
Please complete the application questionnaire which can be found on the Internet at www.siemens.com/insituquestionnaire.
2)
At 0.3 m effective optical path length, average diameter of the dust particles: 15 µm, specific weight of the dust particles: 650 kg/m3
3)
At least: Detection limit
4)
Up to 200 °C, 5 % above this
5)
The accuracy corresponds to intrinsic uncertainty according to IEC 61207: 2 % of MV (0 ... 200 °C); 2.5 % of MV (0 ... 400 °C); at best 0.25 vol%*m.
6)
At high process temperatures, the use of an IR filter A5E00534668 is recommended for the CD 6 sensor (see page 2/26).
7)
Suitable to measure NH3 according to the requirements of "Regulation No. 595/2009/EC on type-approval of motor vehicles and engines with respect to emissions from heavy duty vehicles (EURO VI) from June 18, 2009 and its implementation standard the regulation 582/2011/EC from May 25, 2011" of the Commission of the European Community.
8)
The analyzer can measure at temperatures above 400 °C up to 1 000 °C. As NH3 will decompose at higher temperature levels no analyzer specification can
be given for these temperature ranges.
2/18
Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
Standard application
Effective optical path
length: 0.3 … 12 m
Dust load3): < 50 g/Nm3
Min. measuring
range
(with 1 m eff. opt.
path length)
Max. measuring range
(usually also
dependent on
eff. opt. path
length: see
following
column)
(Max.
measuring
range x
path
length)
(DL x path
length)
under standard conditions1) 2)
(DL x path
Acculength)
racy4)
at 1 013 hPa
with crossinterference
of gas 1
Purging gas
mode
Gas 2
Gas 2
Gas 2
Gas 2
Standard
Optional
A
C
G
Air
H
E
G
Air
Gas 1 Gas 2 Gas Appl. Gas 2
code code
G
HF
HF
H2O
H
0.1 vol%*m
Gas 2
Purging
gas
medium
2
A
0 … 5 vol%
0 … 30 vol%
360 vol%*m 0.1 vol%*m
5%
C
G
Air
H
0 … 5 vol%
0 … 30 vol%
360 vol%*m 300 ppmv*m 300 ppmv*m 5 %
at 200 °C
at 200 °C
E
G
Air
E
G
Air, N2
C
G
Air
J
C
K
D
CO2
L
A
C
G
Air
H2O
M
A
C
G
Air
T
C
G
Air
CO
CO
CO2
0 … 10 vol%
0 … 100 vol% 0 ... 200
vol%*m
0.2 vol%*m
1 vol%
at 50 vol%
CO, 20 °C
5 %5)
1)
At 20 °C, 1 013 hPa
2)
If the smallest permissible process gas temperature of the application is Tmin > 20 °C, the detection limit refers to Tmin and standard pressure (1 013 hPa)
3)
At 0.3 m optical path length, average diameter of the dust particles: 15 µm, specific weight of the dust particles: 650 kg/m3
4)
At least: Detection limit
5)
The accuracy corresponds to intrinsic uncertainty according to IEC 61207: 5 % of MV; at best 0.5 vol%*m.
6)
At high process temperatures, the use of an IR filter A5E00534668 is recommended for the CD 6 sensor (see page 2/26).
Special applications
If the process conditions deviate from the specifications of the standard applications, special applications are also possible on request. Please complete the application questionnaire which can be found at
www.siemens.com/insituquestionnaire on the Internet.
Siemens AP 01 · 2015
2/19
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
■ Overview
Cross-duct sensors CD 6 and cables for non-Ex applications
2
The standard cross-duct sensor consists of a transmitter unit
and a detector unit with the same dimensions. The transmitter
unit provides a connector for the fiber-optic cable. The laser light
is transmitted through this cable. The receiver unit contains a
photodetector and an electronics PCB, and is connected to the
detector unit by a sensor cable.
The most important sensor purging configurations are presented
below:
Purging on the process side with moderate flow
Is selected e.g. for pure gas applications, emission monitoring,
inerting monitoring. The purging gas flow can be adjusted between 0 and approx. 120 l/min at each sensor head using a needle valve (included in delivery).
The sensors are mounted onto flanges. The easiest way to avoid
condensation and dust deposits on the sensor windows is to use
a purging gas, e.g. with instrument air. Purging must be selected
depending on the application. The cross-duct sensors can
therefore be configured for the respective situation. The application reference table provides recommendations for suitable
purging with standard applications.
If a component is to be measured which is also present in measurable quantities in the purging medium - such as oxygen or
moisture - it is necessary to use purging gases such as nitrogen,
superheated process steam or similar. In such cases it is usually
also necessary to purge the sensor heads, since the ambient air
must also be displaced here out of the laser beam path. A differentiation is therefore made between purging on the process side
and purging on the sensor side.
Note: For measurement of O2 at gas temperatures above
600 °C, it may also be possible to tolerate air as the purging medium since its influence on the measurement can be compensated.
Applications with oxygen (high-pressure)
For oxygen measurements with a higher process gas pressure
(1 to 5 bar), the sensor CD 6 can be used together with a highpressure window flange as the process connection. This window
flange is also available in the standard sizes DN 65/PN 6,
DN 80/PN 16 or ANSI 4"/150 lbs. The optical surface to the process is made of borosilicate glass. High-pressure window
flanges can be equipped with window purging, but without purging tubes. Possible purge modes for the window flanges are
"A-C" (no purging or moderate purging on the process side).
Window flanges are tested for leakage before delivery using
overpressure, and show leakage rates of less than 10-5 mbar⋅l/s.
For ordering this application, the MLFB code of the central unit
with the application code "P" must be selected. The process interface suitable for the sensors can be chosen by selection of
the corresponding code in the 6th configurable position of the
MLFB number.
Moderate purging on the process side
Purging on the process side with increased flow
Through omission of needle valve. This type of purging is selected in crude gas applications with higher concentrations of
particles and/or condensation as well as in non-purified flue
gases in combustion plants. The purging gas flow is typically set
between 200 and 500 l/min on each sensor head depending on
the input pressure of the purging medium.
Increased purging on the process side
Purging on the process side with high flow
Through use of air blower or dry process steam. Connectors with
hose adapters are included in the delivery. An additional
Swagelok adapter must be ordered if a high flow of steam or instrument air purging is required (option A27). This type of purging is selected in crude gas applications with very high concentrations of particles and/or condensation such as in the furnaces
of combustion plants. If instrument air is not available, an air
blower is also an alternative for purging in applications with
lower demands. On the process side, dry steam can be used as
the inert purging gas instead of nitrogen (Tmax 240 °C). The
purging gas flow is automatically set between 500 and
< 1 000 l/min on each sensor head depending on the purging air
blower or the steam pressure.
2/20
Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
2
Increased purging on the process side, with hose connection adapter
Purging on sensor side
Can be combined with any purging mode on the process side,
and is always selected if the ambient air must never have an influence on the measurement. The volumes within the sensor
head are then continuously purged with an O2-free gas (with
H2O-free gas in the case of moisture measurement).
Note
With purging on the process side, it may be necessary to use
non-return valves to ensure no process gas can enter the purging gas line in the event of failure of the purging gas supply. This
applies especially in the case of cascaded process and sensor
purging where there is otherwise the danger that, for example,
corrosive process gases could enter the sensor enclosure.
Sensor configuration with high purging on the process side, with 6 mm
joint for use with steam, and with N2 purging on the sensor side
The purging media used on the process side flow through purging gas tubes into the process gas flow. The tubes extend a few
centimeters into the process area, and usually receive a flow of
process gas from the side. This results in a wedge being generated in the inlet zone of the purging gas. The effective measuring
path in the process gas is therefore well-defined as the distance
between the ends of the two purging gas inlet tubes.
Cross-duct sensor CD 6: Options and accessories
Sensor alignment kit
Includes a battery-operated visible light source, a centering aid
with crosshair, and two hook spanners for opening the optics
tube of the sensors.
Please note: the sensor alignment kit is not explosion protected.
125 ... 375 mm
typ. 0 ... 25 mm
Process wall
2° (maximum)
Process flange
Process wall thickness
(incl. insulation)
DN 65/PN 6
or ANSI 4"/150 lbs
Installation requirements for the cross-duct sensors CD 6
Siemens AP 01 · 2015
2/21
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
Purging air blower
Two purging air blowers are required to purge the sensor heads.
Both 230 V AC and 115 V AC versions can be ordered.
Electrical connections:
230 V AC 50 Hz
or 115 V AC 60 Hz
2
Ø12
Air
filter
1 ¼” hose connection
CD 6 sensor for
blower air purging
Sensor configuration with purging air blower
Flow cell (available on special application)
For implementation of measuring configurations with bypass
mode. The cell consists of a stainless steel tube whose internal
surfaces are coated with PTFE to minimize surface effects. With
an effective measuring path of 1 m, the inner volume is only 1.2 l,
and fast gas displacement times can therefore be achieved. The
flow of sample gas can be from the ends or from the center of
the tube, since appropriate 6 mm joints are present here. The
flow cell can be ordered in four configurations:
• Unheated, including assembly for wall mounting
• Unheated, including assembly for wall mounting and a 19"
housing with an air jet pump with a delivery rate of max.
30 l/min
• As above, but can be heated up to approx. 200 °C
• As above, but can be heated up to approx. 200 °C and
mounted on a rack with wheels and integrated 19" frame
Optical bandpass filter (only for O2 CD 6)
Serves to protect the light-sensitive detector in the receiver unit
of the sensor from saturation by IR background radiation. Is used
with measurements in very hot process gases (T > 1 000 °C) or
with unavoidable appearances of flames in the measurement
path.
2/22
Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
■ Technical specifications
Accessories
Cross-duct sensor CD 6
General information
Purging
Design
Transmitter and detector units,
connected by a sensor cable
Materials
Stainless steel (1.4305/303),
aluminum
Installation
Vertical or parallel to the gas flow
Laser protection class
Class 1, safe to the eye
Explosion protection
II 1 G Ex ia op is IIC T4 Ga,
II 1 D Ex ia op is IIIC T135 °C Da
A defined leak rate can only be
guaranteed when using highpressure window flanges. Otherwise it may be necessary for the
owner to carry out an evaluation
in accordance with ATEX
DEMKO 06 ATEX 139648X;
IECEx UL 13.0029X
Nitrogen is permissible as the purging gas for the sensor side. Nitrogen,
steam, air and gases which are not subject to the pressure equipment
directive Cat. 2 are permissible as purging gases for the process side.
2
Purging with instrument air, N2
• Max. overpressure in the sensor
< 500 hPa
• Quality
- Instrument air
According to
ISO 8573-1:2010 [2:3:3]
Note: It is sufficient if the pressure
condensation point is min. 10 K
below the minimum ambient temperature.
- Nitrogen
Purity better than 99.7 %. For oxygen measurements, an O2 content < 0.01 % in the purging gas
(optical path length ≥ 1 m, min.
5 % oxygen in the process gas)
Design, enclosure
Degree of protection
IP65
Dimensions
Diameter: 163, L: 450 mm
Purging gas tube in mm
400 (370 net) x 44 x 40
800 (770 net) x 54 x 40
1 200 (1 170 net) x 54 x 40
Weight
2 x approx. 11 kg
Blower purging
Mounting
DN 65/PN 6, DN 80/PN 16,
ANSI 4"/150 lbs
• Maximum counter pressure
40 hPa
• Maximum flow rate
850 l/min
• Power consumption
370 W
• Degree of protection (fan)
IP54, cover required to protect
against rain
• Maximum flow rate
(process purging)
500 l/min
• Dew point
Benchmark: < -10 °C, condensation on the optics must be
avoided
Please note:
• For purging tubes with a length of 800 and 1 200 mm, the wall thickness
must not exceed 200 mm with DN 65/PN 6 connections. To carry out
measurements with thicker walls, please contact Siemens.
• The optimum adjustment of the flanges can change with high
differences in temperature between the process and environment
depending on the type of assembly.
• Steam conditioning
Overheated
Electrical characteristics
• Maximum temperature
240 °C
• Minimum pressure
> 4 000 hPa
• Maximum pressure
16 000 hPa, refers to a volume
flow of approx. 1 100 l/min
Power supply
Power consumption
24 V DC, supply from central unit
via hybrid cable
< 2 W during operation,
max. 0.6 W with Ex configuration
Steam purging
Climatic conditions
Sensor temperature
• Non-Ex
-20 ... +70 °C during operation,
-30 ... +70 °C during storage and
transportation
• Ex
-20 ... +60 °C during operation,
-30 ... +70 °C during storage and
transportation
Humidity
< 95 % RH, above dew point
Pressure
800 ... 1 100 hPa
Temperature range on the sensor
side of the process interface (connection plate)
-20 … +70 °C
Measuring conditions
Measurement path
0.3 ... 12 m (other lengths on
request)
Dust load
The influence of dust is very complex and depends on the path
length and particle size. The optical attenuation increases exponentially at longer path lengths.
Smaller particles also have a
large influence on the optical
attenuation. With high dust load,
long path length and small particle size, the technical support at
Siemens should be consulted.
Siemens AP 01 · 2015
2/23
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
Hybrid and sensor cables
General information
Configuration hybrid cable
Two optical fibers and two twisted
copper wires in one cable for
24 V DC. Single-mode optical
fiber configured at both ends with
E2000 angle connectors. Multimode optical fiber configured at
both ends with SMA connectors.
Cable is flame-retardant, very
good resistance to oil, gasoline,
acids and alkalis, outer sheath
UV-resistant
Cable sheath
Oil-resistant polyurethane
Dimensions
• For > 500 m, an external power
supply must be additionally ordered
• For installation in hazardous
zones, non-intrinsically-safe cables have to be spatially separated from intrinsically-safe lines
• Diameter
< 8.5 mm
• Length
• Use in non-hazardous and
Ex Zone 2: Up to 700 m
• Use in Ex Zone 0 and Zone 1:
Up to 250 m
Weight
75 kg/km
Maximum tensile force
200 N
Maximum lateral pressure
1 000 N/cm
Impact resistance
200 N/cm
Maximum tensile strength
500 N
Minimum bending radius
12 cm
2
Climatic conditions
Ambient temperature
-40 ... +70 °C during transport,
storage and operation
-5 ... +50 °C during laying
Humidity
< 95 % rel. humidity, above dew
point (in operation and storage)
2/24
Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
Selection and ordering data
LDS 6 in-situ gas analyzer
Pair of sensors (cross-duct sensor)
Click on the Article No. for the online configuration in the PIA Life Cycle Portal.
Explosion protection
Without
II 1 G Ex ia op is IIC T4 Ga, II 1 D Ex ia op is IIIC T135 °C Da
Sensor type
Standard cross-duct sensor
Measured component
O2
All gases except O2
Purging, process side
Without purging
Sensor side
Without purging
Air or N2, 1 to 2 l/min;
incl. needle valve, 6 mm Swagelok
Without purging
Instrument air or N2
Reduced flow: 0 ... 120 l/min
incl. needle valve, 6 mm Swagelok
Air or N2
Increased flow: 200 ... 500 l/min
incl. 6 mm Swagelok
Air, fan or steam;
high flow: > 500 l/min
incl. 1¼" hose adapter
Article No.
7MB6122- 7 7 7 7 7 - 7 7 7 7
0
1
2
A
W
A
B
C
Air or N2, 1 to 2 l/min;
incl. needle valve, 6 mm Swagelok
Without purging
D
Air or N2, 1 to 2 l/min;
incl. needle valve, 6 mm Swagelok
Without purging
F
Air or N2, 1 to 2 l/min;
incl. needle valve, 6 mm Swagelok
Purging tubes, material
No purging tubes
Stainless steel, EN 1.4432/316L
Purging tubes, length
No purging tubes
400 mm
800 mm
1 200 mm
75 mm, e.g. for engine test rigs
Process connection
Stainless steel flange (1.4404/316L),
connection dimension DN 65/PN 6, MAWP (PS) @ 20 °C: 0.05 MPa
Stainless steel flange (1.4404/316L),
connection dimension ANSI 4"/150 lbs, MAWP (PS) @ 20 °C: 7.25 psi
Stainless steel flange (1.4404/316L),
connection dimension DN 65/PN 6, MAWP (PS) @ 20 °C: 0.05 MPa,
incl. enclosed welding flanges, e.g. for engine test rigs
Pressure-resistant window flange (1.4404/316L, borosilicate glass),
connection dimension DN 65/PN 6, MAWP (PS) @ 20 °C: 0.6 MPa
Pressure-resistant window flange (1.4404/316L, borosilicate glass),
connection dimension DN 80/PN 16, MAWP (PS) @ 20 °C: 1.6 MPa
Pressure-resistant window flange (1.4404/316L, borosilicate glass),
connection dimension ANSI 4"/150 lbs, MAWP (PS) @ 20 °C: 232 psi
Hybrid cable
Length [m]
No hybrid cable
Standard length
5
10
25
40
50
Customized length
(specified in complete meters)
E
G
H
0
1
0
1
2
3
4
0
1
2
3
4
5
X
A
B
E
G
H
Z
Siemens AP 01 · 2015
2/25
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
Selection and ordering data
LDS 6 in-situ gas analyzer
Pair of sensors (cross-duct sensor)
Sensor connecting cable
No sensor connecting cable
Standard length
2
Customer-specific length
Language (supplied documentation)
German
English
French
Spanish
Italian
Article No.
7MB6122- 7 7 7 7 7 - 7 7 7 7
Length [m]
Selection and ordering data
Additional versions
Add "-Z" to Article No. and specify Order code
6 mm Swagelok adapter for purging with steam, purging modes G and H
Acceptance test certificate 3.1 (leak test) in accordance with EN 10204
(only in combination with pressure-resistant window flanges)
Acceptance test certificate 3.1 (material certificate) in accordance with EN 10204
(only in combination with pressure-resistant window flanges)
Hybrid cable, customized length
Sensor cable, customized length
TAG label, customized inscription
Additional units
Purging air blower 230 V
Purging air blower 115 V
CD 6, sensor alignment kit
Optical filter for reducing IR background radiation (flame filter), only O2
2/26
Siemens AP 01 · 2015
X
A
B
E
Z
5
10
25
(specified in complete meters)
0
1
2
3
4
Order code
A27
C12
C13
P1Y
Q1Y
Y30
Article No.
A5E00829151
A5E00829150
A5E00253142
A5E00534668
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
■ Dimensional drawings
Ø 163
2
395
395
105
105
Ø 163
Ø 44.5 at 400 length
Ø 54 at 800, 1 200 length
Cross-duct sensor CD 6, moderate purging (instrument air), version
according to Article No. 7MB6122-**C1*-0***, dimensions in mm
400 (800, 1 200)
370 (770, 1 170)
Process flange
(provided by
customer)
400 (800, 1 200)
370 (770, 1 170)
Ø 6 mm fitting
Process flange
(provided by
customer)
Ø 44.5 at 400 length
Ø 54 at 800, 1 200 length
Cross-duct sensor CD 6, increased purging (instrument air), version
according to Article No. 7MB6122-**E1*-0***, dimensions in mm
Siemens AP 01 · 2015
2/27
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
Ø 163
2
105
105
Ø 163
395
395
Test valve
1¼” hose (OD)
Ø 44.5 at 400 length
Ø 54 at 800, 1 200 length
Cross-duct sensor CD 6, blower purging, version according to
Article No. 7MB6122-**G1*-0***, dimensions in mm
2/28
Siemens AP 01 · 2015
Process flange
(provided by
customer)
400 (800, 1200)
Process flange
(provided by
customer)
370 (770, 1170)
400 (800, 1 200)
370 (770, 1 170)
Ø 6 mm fitting
Ø 44.5 at 400 length
Ø 54 at 800, 1200 length
Cross-duct sensor CD 6, sensor and process side purging, version
according to Article No. 7MB6122-**H1*-0***-Z A27, dimensions in mm
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
Ø 163
š
105
431
2
Fitting
for Ø 6 mm
OD hose
High pressure flange
Check valve
Cross-duct sensor CD 6, purged version according to
Article No. 7MB6122-*WC14-2***, dimensions in mm
CD 6 high-pressure sensor for oxygen, dimensions in mm
Siemens AP 01 · 2015
2/29
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Documentation
■ Selection and ordering data
Manual
Article No.
LDS 6 manual
2
• German
A5E00295893
• English
A5E00295894
• French
A5E00295895
• Italian
A5E00295896
• Spanish
A5E00362720
Suggestions for spare parts
■ Selection and ordering data
Description
Quantity for
2 years
Quantity for
5 years
Article No.
CD 6, window module, quartz
1
2
A5E00338487
CD 6, window module, engine test rig, no purging
1
2
A5E00338490
CD 6, high-pressure window flange (1.4404/316L), DN 65/PN 6
1
2
A5E00534662
CD 6, high-pressure window flange (1.4404/316L), DN 80/PN 16
1
2
A5E00534663
CD 6, high-pressure window flange (1.4404/316L), ANSI 4"/150 lbs
1
2
A5E00534664
Gasket for CD 6 hybrid cable
1
2
A5E00853911
CD 6, sensor electronics FO InGaAs (version 2)
1
1
A5E01090409
CD 6, sensor electronics FO Ge, only HCl (version 2)
1
1
A5E01090413
CD 6, sensor electronics SW, only O2
1
1
A5E00338533
CD 6, sensor electronics ATEX SW, only O2
1
1
A5E00338563
CD 6, sensor electronics ATEX HCI
1
1
A5E00853896
CD 6, sensor electronics ATEX NH3, CO, CO2, HF, H2O, low gain
1
1
A5E00338572
CD 6, purging tube 400 mm 1.4432/316L
1
2
A5E00253111
CD 6, purging tube 800 mm 1.4432/316L
1
2
A5E00253112
CD 6, purging tube 1200 mm 1.4432/316L
1
2
A5E00253113
■ More information
For demanding applications it is recommended to keep purging
tubes, window modules and detector electronics in stock (quantities stated per measuring point, i.e. per pair of sensors).
2/30
Siemens AP 01 · 2015
For the suitability of different parts (version 1 or version 2) please
consult the instrument manual or contact Siemens directly. In
general, all new analyzers are compatible with spare parts of
version 2.