7
Installation
7.1
Requirements and recommendations
Before installing the Quantometer
1.
Remove the protective film from the inlet and outlet of the meter.
2.
Check the completeness of the meter (e.g. cover plugs, volume of oil supplied) and for
any possible transport damage.
3.
Check that the turbine wheel rotates easily and stops smoothly, e.g. by blowing into the
MQMe Quantometer.
4.
Ensure that there are no impurities, condensation, deposits or welding and drilling
residues in the pipeline. It is especially important to clean any elbow pipes in vertical
installations to prevent any damage if this dirt passes through the meter. A cone-
shaped startup filter can be installed to protect the meter during its initial operation.
This filter and the collected dirt should then be removed after 4–6 weeks at the latest to
prevent any disruption to the flow profile and thus a reduction in the measuring
accuracy.
5.
In order to achieve a high level of accuracy, it is recommended that a straight inlet pipe
with a nominal size of ≥ 3 DN and an outlet pipe with a nominal size of ≥ 2 DN are used.
6.
Vibrations and pulsations should be avoided at the measurement location. The
installation of a suitable compensator can effectively dampen this kind of interference.
7.
Abrupt changes in the flow rate and strong pulsating flows of gas will increase
measurement errors. These issues can arise due to e.g. solenoid valves frequently
switching on and off. Pressure surges – especially due to the quick opening of valves –
can damage the ball bearing in the turbine wheel and cause the meter to fail during
prolonged operation.
8.
Filters (with a small mesh size) should be installed upstream of the meter to protect it,
in particular, against dirt particles >50 µm both during startup and in continuous
operation.
9.
The gas must be dry. If condensation occurs, it is recommended that a condensate
separator is installed upstream of the meter (a separator is already integrated into some
types of filter).
In this case, it is recommended that the meter
●
is installed with a flow direction from the top to the bottom and
●
not at the lowest point of the pipeline.
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