Revision: 3.0.3
3
Measurement Site Selection
When selecting a measurement site, it is important to select an area where the fluid flow profile is fully
to guarantee a highly accurate measurement. Use the following guidelines to select a proper installation site:
Choose a section of pipe that is always full of liquid, such as a vertical pipe with flow in the upward direction or a
full horizontal pipe.
Ensure enough straight pipe length at least equal to the figure shown below for the upstream and downstream
transducers installation.
Ensure that the pipe surface temperature at the measuring point is within the transducer temperature limits.
Consider the inside condition of the pipe carefully. If possible, select a section of pipe where the inside is free of
excessive corrosion or scaling.
10D min
10D
min
10D
min
5D
min
0.5D
min
Straight length of Upstrea
Name
Pump
Value
Diffuser
Tee
90
o
bend
Reducer
D116
Series Ultrasonic Flowmeter
Measurement Site Selection
When selecting a measurement site, it is important to select an area where the fluid flow profile is fully
to guarantee a highly accurate measurement. Use the following guidelines to select a proper installation site:
Choose a section of pipe that is always full of liquid, such as a vertical pipe with flow in the upward direction or a
Ensure enough straight pipe length at least equal to the figure shown below for the upstream and downstream
Ensure that the pipe surface temperature at the measuring point is within the transducer temperature limits.
Consider the inside condition of the pipe carefully. If possible, select a section of pipe where the inside is free of
L
≥
10D
L
≥
5D
L
≥
50D
L
≥
10D
≥
30D
L
≥
5D
L
≥
10D
L
≥
5D
L
≥
50D
L
≥
30D
L
≥
10D
Straight length of Upstrea
m
Straight length of Downstream
piping
Detector
Flow controlled downstream
Check Value
Series Ultrasonic Flowmeter
Page 14 of 53
When selecting a measurement site, it is important to select an area where the fluid flow profile is fully
developed
to guarantee a highly accurate measurement. Use the following guidelines to select a proper installation site:
Choose a section of pipe that is always full of liquid, such as a vertical pipe with flow in the upward direction or a
Ensure enough straight pipe length at least equal to the figure shown below for the upstream and downstream
Ensure that the pipe surface temperature at the measuring point is within the transducer temperature limits.
Consider the inside condition of the pipe carefully. If possible, select a section of pipe where the inside is free of
Straight length of Downstream
Flow controlled downstream
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