VEGA VEGAMET 514… D - Manual (Page 30)

30 VEGAMET 514… D
Set-up, parameter adjustment
Trapezoidal weir (Cipolletti)
With sharp overflow edge
Values for Q
max
B K Q
max
h
max
Q
min
h
min
in mm (Factor) in m 3 /h in mm in m 3 /h in mm
300 2011 116,8 150 29,5 60
450 3014 354,4 240 44,3 60
600 4011 760,4 330 58,9 60
800 5353 1457 420 78,7 60
1000 6688 2581 530 93,3 60
1500 10043 6523 750 147,6 60
2000 13381 14397 1050 196,7 60
3000 20082 36893 1500 295,1 60
Calculation of Q
max
The following formula can be used for calculation of
the actual flow of liquid levels < h
max
… h
min
.
Presumed values for a calculation example
B = 0,6 m
K = 4011 (derived from B)
h = 0,27 m
Q
max
= K x h 1,5
= 4011 x 0,27 1,5
= 562,73 m 3 /h
Rectangular overflow without contraction
With sharp overflow edge without throat
Values for Q
max
B Q
max
h
max
Q
min
h
min
in mm in m 3 /h in mm in m 3 /h in mm
200 54,81 120 19,4 60
400 310 240 38,7 60
600 650 300 58,1 60
800 1592 450 77,5 60
1000 3064 600 96,9 60
1500 6423 750 145,3 60
Calculation of Q
max
The following formula can be used for calculation of
the actual flow of liquid levels < h
max
… h
min
.
Presumed values for a calculation example
B = 1,5 m
K = 6593
h = 0,3 m
Q
max
= B x K x h 1,5
= 1,5 x 6593 x 0,3 1,5
= 1625 m 3 /h
B
h
max
1 /
4
h
max
B
h
max
K = 6593
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