Measurement accuracy
If the velocity profile is asymmetric, the measurement values can differ from the ideal values. For this reason, the flow
meter should never be located right up to any flow disturbance. The method error in the table below will differ, depen-
ding on the distance to the flow disturbance.
l = straight distance before and
after disturbances
Method
error
± 7%
ØD
l
l ≥ 1 D
l
ØD
l
l ≥ 1 D
l
l
ØD
l ≥ 3 D
l
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