SICK FLOWSIC500

Annex
FLOWSIC500 · Operating Instructions · 8025733/1GMJ/V4-2/2022-07 · © SICK Engineering GmbH 145
Subject to change without notice
9.2.2 Methane concentration (CH
4
) in natural gas
At very high methane concentrations, the FLOWSIC500 requires a minimum operating
pressure for meter size DN80 up to DN150. Methane has a damping effect on the signal
transmission.
Meter size DN50
Fig. 63 Minimum operating pressure DN50
Meter size DN80/DN100/DN150
Fig. 64 Minimum operating pressure DN80/DN100/DN150
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
-40 -30 -20 -10 0 10 20 30 40 50 60 70
Absolutdruck [bar]
Gastemperatur [°C]
0 % ... 100 %
1.01325 bar(a)
Pressure [bar(a)]
Gas temperature [°C]
Methane concentration [%]
Reference pressure at 0 m
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
-40 -30 -20 -10 0 10 20 30 40 50 60 70
Absolutdruck [bar]
Gastemperatur [°C]
100 %
99 %
98 %
96 % / 97 %
93 % / 95 %
1.01325 bar(a)
Pressure [bar(a)]
Gas temperature [°C]
Methane concentration [%]
Reference pressure at 0 m