22
3 Operation
Measurement data display
VOL%
CxHy
9.0
VOL% CO2
0
20.9
VOL% O2
0,1
1,0
0
10
100
10
100
– Digit, for example,
0 % vol. CO
2
20.9 % vol. O
2
9.0 % vol. C
x
H
Y
– Bar display with quasi-logarith-
mic scale (for C
x
H
y
)
Fig. 10: Ethane analysis measuring mode
3.2.6.1 General information on ethane analysis
Ethane analysis is used to demonstrate the presence of natural
gas and to distinguish between natural gas and swamp gas.
This analysis utilises the fact that natural gas contains ethane,
but swamp gas does not. Thus, if ethane is detected, it can be
concluded that natural gas is present.
Note:
Ask the network operator about the composition of natural gas.
Request an analysis certificate.
Ethane can definitely be detected in natural gas at a minimum
concentration of 1 % vol. If the concentration of ethane in natural
gas is less than 0.5 % vol., the gas cannot be detected. If the
concentration falls between these two values, the analysis can
be carried out, but the result must be assessed subsequently.
During the ethane analysis, the gas sample is always analysed
for the presence of the following three gases:
●
Methane CH
4
●
Ethane C
2
H
6
●
Propane C
3
H
8
Requirement
The ethane analysis only works if the gas sample exhibits a spe-
cific concentration.
