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3 Gas chromatograph PGC 9300
3.10 Required gases and gas consumption
3.10.1
The used helium and argon carrier gases must correspond to at least Class 5.0
(99.999%). The following inlet pressure must be correctly adjusted for proper func-
46
tion of the measuring element:
Pressure monitoring takes place with a pressure transducer arranged in the gas distri-
bution. The analytical computer monitors the output signal of the pressure transducer.
The total carrier gas consumption varies as follows depending on the column pres-
sure and variant:
Note
Since helium, in particular, escapes through the smallest leaks, careful
sealing and inspection of the system is very important.
3.10.2
The following composition is used for the internal calibration gas:
Component
Nitrogen
Methane
Carbon dioxide
Ethane
Propane
Iso-butane
n-butane
neo-pentane
iso-pentane
n-pentane
n-hexane
Oxygen
Hydrogen
Manual PGC 9300 EN07 June, 18th 2018
Carrier gas
p
= 5.5 bar (±10%)
T
= 0.4 Nl/h – 1.2 Nl/h
Q
T
Calibration gas
Natural gas (9301)
Biogas (9302)
(Type 11D)
4.00
88.90
1.50
4.00
1.00
0.20
0.20
0.05
0.05
0.05
0.05
0.00
0.00
Concentration (mol%)
Natural gas extended
(Type 9M)
(9303, 9304) (Type 12M)
4.00
4.00
89.00
87.45
2.50
1.50
2.50
4.00
1.00
1.00
0.20
0.20
0.20
0.20
0.00
0.00
0.00
0.05
0.00
0.05
0.00
0.05
0.40
0.50
0.20
1.00
Natural gas (9305)
(Type GOST)
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