5 Selection of the Measuring Point FLUXUS F70x
UMFLUXUS_F7V4-6-2EN, 2017-10-01 25
5.3 Selection of the Measurement Arrangement Taking onto Account the Measuring
Range and the Measuring Conditions
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 inner pipe wall or
with strongly attenuating media (only 1 sound path)
• smaller flow velocity and sound speed range compared to
the diagonal arrangement
• transverse flow effects are compensated for because the
beam crosses the pipe in 2 directions
• higher accuracy of measurement because the accuracy
increases with the number of sound paths
Diagonal arrangement with 2 beams Reflection arrangement with 2 beams and 2 planes
• the same properties like reflection arrangement with 2
beams
• additional property:
influences of the flow profile are compensated for be-
cause the measurement takes place in 2 planes
• the same properties like diagonal arrangement with 1
beam
• additional property:
transverse flow effects are compensated for because the
measurement is conducted with 2 beams
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