Configuration Examples - Siemens LDS 6 Operating Instructions Manual

Technical information

2.4 Configuration examples

2.4 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.
Figure 2-7
A feature of the standard applications defined in the ordering data of the LDS 6 is that the typical
process conditions are well-known and documented, and that 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 product
sites on the Internet.
To avoid contamination of optics housing openings on the process side, clean gaseous purging
media are used such as instrument air, N
which slightly penetrate into the process gas stream, define the effective measuring path length.
Figure 2-8
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 not
necessary.
18
Typical transmitted light setup of LDS 6, in-situ
Typical transmitted light setup of LDS 6, in bypass
or steam. Purging air tubes on the optics housings,
2
Operating Instructions, 01/2022, A5E00295894-10
LDS 6