Siemens LMV27.100x2 - Page 27

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Building Technologies Basic Documentation LMV27... CC1P7541en
4 Technical Data 17.12.2018
Threshold values when flame is supervised by an ionization probe:
- Start prevention (extraneous light) Intensity of flame (parameter 954) ≥18%
- Operation Intensity of flame (parameter 954) >24%
0
10
20
30
40
50
60
70
80
90
100
0246810121416
Fla
m
e intensity in
%
Ionization current in µA
Ionization input
Bild 442en/0916
Figure 5: Ionization input at AC 230 V
Ionization probe
LMV...
M
C
ION
X10-05/2
X10-05/1
Legend
C Electrolytic capacitor 100...470 µF; DC 10...25 V
ION Ionization probe
M Microammeter, Ri max. 5,000 
Figure 6: Measuring circuit for ionization probe
Measuring circuit for
detector current
measurement