Page
123
BS3680 Rectangular Broad Crested Weir
Point of Measurement
The transducer must be above the
maximum head P704
by at least the near
blanking distance P107
.
The head is measured at a point 3 to 4
times
the
maximum head
upstream
from the weir crest, to ensure the surface of the liquid is not affected by
turbulence or drawdown.
Calculations
A
BSOLUTE
If the flow calculation is to be
absolute
P702
=
1
the flow will be calculated
using the formula: q = (2/3)
1.5
C
e
b(gh
3
)
0.5
Where: q = flowrate
Ce
=
discharge coefficient
calculated by the Flow 5
P723
b = approach width
P710
g = gravitational acceleration (nominal value = 980.66 cm/s
2
)
h = head
Содержание ULTRA 5
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Страница 23: ...Page 15 The full dimensions of the Fascia mount enclosure are as shown below ...
Страница 25: ...Page 17 Dimensions of the panel enclosure are as shown below VOLTAGE SELECTOR AC POWER FUSE 230 115 ...
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