Flame Detectors - Siemens LMV37.4 Series Basic Documentation

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7.2 Flame detectors

 For display of the flame on the AZL2..., the following general conditions apply:
Display is subject to various component tolerances, which means that
-
deviations of 10% can occur
Note that, for physical reasons, there is no linear relationship between flame
-
display and detector signal values
The LMV37.4... system can be used with different types of flame detectors. For the
correct use of flame detectors, refer to chapter Sequence diagrams.
The flame detector used must be correctly parameterized.
Caution!
Only ionization probes are suited for continuous operation!
In the hardware of the LMV37.4..., the flame signals are subdivided into 2 groups (group
0 covering the QRB... and QRC..., and group 1 covering ionization and the QRA...).
The flame detector for gas is selected via parameter 221, that for oil via parameter 261.
No. Parameter
Gas: Active detector flame evaluation
221 0 = QRB... / QRC...
1 = ION / QRA...
Oil: Active detector flame evaluation
261 0 = QRB... / QRC...
1 = ION / QRA...
Basic documentation LMV37.4...
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CC1P7546en
20.09.2013