41
10 Applications and functions
VEGAMET 341 • 4 … 20 mA
63730-EN-210616
Manufacturer definition
If you use a Parshall flume from the manufacturer ISCO, this option
must be selected. This gives you a high accuracy of flow measure
-
ment with easy configuration.
Alternatively, you can also take over Q/h table values provided by the
manufacturer here.
•
ISCO Parshall flume
•
Q/h table (assignment of height with corresponding flow in a table)
3 ... 4 h
max
90°
2
3
1
h
ma
x
≥ 2 x
h
ma
x
90°
4
2
3
≥ 250 mm
(9.84
")
≥ 250 mm
(9.84")
Fig. 19: Flow measurement with rectangular flume: h
max.
= max. filling of the
rectangular flume
1 Overfall orifice (side view)
2 Upstream water
3 Tailwater
4 Overfall orifice (view from tailwater)
Example rectangular
flume
