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 sensor 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.
20
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 sensor heads,
2
Operating Instructions, 01/2009, A5E00295894-05
LDS 6