54
11 Appendix
11 Appendix
11.1 Wet/Dry Measurement Deviations, Conversion Table
NOTICE
The LT3 carries out measurements directly in the humid flue gases (wet measurement). When
extractive devices are used, flue gases are removed and prepared.
Dry measurements are normally used here, since the humidity has been extracted from the
flue gas. As a result, O
2
measurement values vary (see diagrams below).
Fig. 11-1 Theoretical max. deviations of
the O
2
concentration in wet and dry meas-
urement.
Fuel: natural gas or oil
Fig. 11-2 Calibration plot for the concentra-
tion values of O
2
(dry) and O
2
(wet)
O
2
concentration range Constant C gas/Ch
4
Constant C oil/(CH
2
)
x
0-6 % O
2
1.18 1.115
6-12 % O
2
1.08 1,08
0-12 % O
2
1.15 1.10
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