RMG TME400, Operating Manual

Page: 26 / 156

1 Introduction
MANUAL TME400-VCF · EN08 · July, 01 st 2021
20
1.3.5. Use of gas meters for different gases
Gas Symbol Tight-
ness at
0°C and
1.013 bar
Meter
housing
Comments
Natural gas 0.8 Standard
City gas Standard
Methane CH
4
0.72 Standard
Ethane C
2
H
6
1.36 Standard
Propane C
3
H
8
2.02 Standard
Butane C
4
H
10
2.70
Standard
Air 1.29 Standard
Argon Ar 1.78 Standard
Helium He 0.18 Standard
Carbon dioxide (dry) CO
2
1.98 Standard
Nitrogen N
2
1.25 Standard
Hydrogen H
2
0.09 Standard up to 20%
Generally, a reduced meas-
uring range
Ethylene (gaseous) C
2
H
4
1.26 Special Special version
(also for humid gases):
Teflon coating,
special lubrication,
special material, etc.
Biogas Special
Sour gas Special
Digester gas / sewage
gas
Special
Sulfur dioxide SO
2
2.93 Special
The components of the gases must be within the concentration limits according to EN
437:2009 for test gases. Safe operation is guaranteed with these specified gases.
Other gases on request.