Endress+Hauser dosimass, Руководство по эксплуатации

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Dosimass Installation
Hauser 9
System pressure
It is important to ensure that cavitation does not occur because it would influence the oscillation of
the measuring tube. No special measures need to be taken for fluids which have properties similar
to water under normal conditions.
In the case of liquids with a low boiling point (hydrocarbons, solvents, liquefied gases) or in suction
lines, it is important to ensure that pressure does not drop below the vapor pressure and that the
liquid does not start to boil. It is also important to ensure that the gases that occur naturally in many
liquids do not outgas. Such effects can be prevented when system pressure is sufficiently high.
Consequently, it is generally best to install the sensor:
• downstream from pumps (no danger of vacuum),
• at the lowest point in an ascending pipeline.
3.2.3 Orientation
Vertical:
Recommended orientation with upward direction of flow. When fluid is not flowing, entrained
solids will sink down and gases will rise away from the measuring tube. The measuring tubes can
be completely drained and protected against solids buildup.
A0008557
Fig. 4: Dosimass orientation
Horizontal:
The measuring tubes of Dosimass must be horizontal and beside each other. When installation is
correct, the transmitter housing is above or below the pipe (View 2, 3). Always avoid having the
transmitter housing in a lateral position.
"
Caution!
The measuring tubes of Dosimass are slightly curved. The position of the sensor, therefore, has to
be matched to the fluid properties when the sensor is installed horizontally (

å
5).
A0008609
Fig. 5: Horizontal installation with Dosimass
1 Not suitable for fluids with entrained solids. Risk of solids accumulating.
2 Not suitable for outgassing fluids. Risk of air accumulating.
1 2 3
1 2