6 Installation
6.2 Transducers
FLUXUS F808
2020-06-25, UMFLUXUS_F808V2-2EN
28
6.2.1.3
Selection of the measurement arrangement
If the measuring point is situated near an elbow, the following measurement arrangements are recommended for the
selection of the sound beam plane.
Diagonal arrangement with 1 beam
Reflection arrangement with 1 beam
• wider flow velocity and sound speed
range compared to the reflection
arrangement
• use in the presence of deposits on the in
-
ner pipe wall or with strongly attenuating
gases or liquids (only 1 sound path)
• smaller flow velocity and sound speed
range compared to the diagonal
arrangement
• transverse flow effects are compensated
because the beam crosses the pipe in 2
directions
• higher accuracy of measurement
because the accuracy increases with the
number of sound paths
Vertical pipes
Horizontal pipes
• The sound beam plan is selected in an
angle of 90° to the elbow plane. The el
-
bow is upstream of the measuring point.
• The sound beam plane is selected in an
angle of 90° ± 45° to the elbow plane.
The elbow is upstream of the measuring
point.
elbow plane
flow
direction
flow direction
elbow plane