VEGA VEGASCAN 850 - Manual (Page 46)

46 VEGASCAN 850
Mounting and installation
B
Khafagi-Venturi flume
90°
h
max
Sensor
3 … 4 x h
max
Flow measurement on open flumes
h
max
³ 2 x h
max Overfall edge
90°
Flow measurement on open flumes
Upstream water Downstream water
³ 5 cm
90°
3 … 4 x h
max
Overfall edge
³ max.
distance
4.6 Flow measurement
The short examples on this page are only
basic information on flow measurement. You
can get complete planning information from
the flume manufacturers and in special litera-
ture.
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
³ 2 x h
max
from ground
- Installation perpendicular to the liquid sur-
face
- Keep min. distance in relation to h
max
- Min. distance from edge opening to down-
stream water
³ 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 sur-
face
- Keep min. distance in relation to the height
of damming h
max