Suitability And Compatibility For Natural Gas Containing H; Areas Of Application; Working Principle Of The Tme400 - RMG TME400-VM VMF Series Operating Manual

1 Introduction
1.3.5.1.
The TME400 can be used in hydrogen-containing natural gas up to pure hydrogen.
There are no safety-related concerns for this use.
Notice
20
In accordance with the German TR-G19 – the TME400 is suitable and ap-
proved for use in custody transfer applications – in natural gases with a
maximum hydrogen content of 10 mol-%, with the accuracy specified in
chapter 1.4.2.9 Measuring accuracy.
Since there are currently no certified test rigs in Germany to calibrate meters with
higher hydrogen-containing gases, an accuracy above 10 mol-% cannot be tested or
certified.
Not custody transfer measurements are of course possible in natural gases with a hy-
drogen content above 10 mol%. However, a reduced measuring range must be taken
into account if applicable. Please contact RMG for further information.

1.4. Areas of application

The following chapter provides handling instructions for the TME400 turbine meter for
the purpose of safe and reliable operation of the device.
Note
Some of the settings described below must not be made until you have read
the explanations in chapter4 Operation.
1.4.1.
The working principle of a mechanical turbine meter is based on the measurement of
the gas velocity of the flowing gas which powers a turbine wheel. The speed of the
turbine within the measuring range (Q
mean gas velocity and thus the flow rate. The number of rotations, therefore, is a
measurement for the gas volume flowing through.
Manual TME400-VMF · EN07 · December, 7

Suitability and compatibility for natural gas containing H

Working principle of the TME400

th
- Q ) is approximately proportional to the
min max
2020
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