27
4 Mounting
VEGAPULS 64 • 4 … 20 mA/HART - two-wire
51141-EN-160815
•
Distance to the overfall orifice
•
Distance of orifice opening above ground
•
Min. distance of the orifice opening to tailwater
•
Min. distance of the sensor to max. storage level
2
3 ... 4 x h
max
90°
h
max
1
B
Fig. 24: Flow measurement with Khafagi-Venturi flume: h
max.
= max. filling of the
flume; B = tightest constriction in the flume
1 Position sensor
2 Venturi flume
In general, the following points must be observed:
•
Installation of the sensor at the inlet side
•
Installation in the centre of the flume and vertical to the liquid
surface
•
Distance to the Venturi flume
•
Min. distance of the sensor to max. storage level
Flow measurement with
Khafagi Venturi flume
