BERTHOLD TECHNOLOGIES LB 3602, Руководство по эксплуатации

Страница: 15 / 43

LB 379
15
Figure 5: Installation on a horizontal pipeline with gas bubbles and debris
Extensions of the pipeline should be avoided. If they are unavoidable, they should always
be performed only on vertical lines.
Pipe extensions may be made at the measurement point only if
 a continuous flow of product is ensured over the entire pipe cross section. Par-
ticularly with highly viscous products this will not always be the case. Usually,
the product flows only in the center. However, the measurement covers the entire
diameter of the product in the path or radiation. Therefore, the measurement
result is not representative.
 no gas bubbles are present in the path of radiation.
 suspension measurements are not carried out directly behind a pipe-bend, for
there the material will not be distributed homogeneously.
 The distance from the bend must be the larger
 the higher the flow rate
 the bigger the difference between liquid density and solid density
d) Measuring system installed outdoors have to be protected from rain and direct sun-
shine by a canopy.
Figure 6: Canopy roof for protection against sun and rain in outdoor installations
Gas bubbles
Debris