VEGA VEGASON 51V…53V - Manual (Page 31)

VEGASON 51 V … 53 V 31
Mounting and installation - Flow measurement
The short examples on this page should give
just introductory information for your flow
measurement. Planning information is given
by the flume manufacturers and in special
literature.
Rectangular flume
- Installation of the sensor on the upstream
side
- Note distance to the overfall edge
(3 … 4 x h
max
)
- Installation centered to the flume
- Edge opening
⊕
2 x h
max
from ground
- Installation perpendicular to the liquid
surface
- Keep min. distance relating to h
max
- Min. distance of the edge opening of
downstream water
⊕
50 mm
Khafagi-Venturi flume
- Installation of the sensor on the inlet side
- Note distance to the Khafagi-Venturi flume
(3 … 4 x h
max
)
- Installation perpendicular to the liquid
surface
- Keep min. distance relating to the height of
damming h
max
4.5 Flow measurement
Flow measurement on open flumes
< min. distance
h
max
⊕
2 x h
max Overfall edge
90
°
B
Flow measurement on open flumes
Upstream water Downstream water
⊕
5 cm
90
°
3 … 4 x h
max
Khafagi-Venturi flume
90
°
h
max
Sensor
3 … 4 x h
max
Overfall edge