Simple Exponential Devices, P3 = 0 - Siemens OCM III Instruction Manual

SIMPLE EXPONENTIAL DEVICES, P3 = 0

TYPICAL SHARP-CRESTED WEIRS
transducer *
minimum
3 x h
max
Typical Weir Profiles
Rectangular - suppressed
V - notch or Triangular
U 0 = 1.5
U 0 = 2.5
Trapezoidal (Cipolletti)
Sutro (Proportional)
U 0 = 1.5 U 0 = 1
(symmetrical or asymmetrical)
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).
* The transducer must be above the maximum head by at least the
blanking value, P47.
7ML19985AB01 OCM III 54