SIMPLE EXPONENTIAL DEVICES, P3 = 0
TYPICAL SHARP-CRESTED WEIRS
Typical Weir Profiles
For rated flows under free flow conditions, the head is measured upstream of the weir
plate at a minimum distance of 3 times the maximum head (i.e. where the liquid
surface is not affected by drawdown).
transducer *
Rectangular - suppressed
U 0 = 1.5
V - notch or Triangular
U 0 = 2.5
Sutro (Proportional)
U 0 = 1
(symmetrical or asymmetrical)
Trapezoidal (Cipolletti)
U 0 = 1.5
* The transducer must be above the maximum head by at least the
blanking value, P47.
minimum
3 x h
max
7ML19985AB01 OCM III 54
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