ULTRATWIN (UL)
INSTRUCTION MANUAL
86
BS3680 Flumes (P700 = 2)
Point of Measurement
The transducer must be above the
maximum head P704
by at least the
near
blanking distance P107
.
For a
Rectangular
and
U-throated
flume, the head is measured at
3
to
4
times
the
maximum head
upstream
from the beginning of the
converging
section
, to ensure the surface of the liquid is not affected by turbulence.
(See DRWG 6)
3-4 x hmax
DRWG. 6
THROAT LENGTH
DIM C (P712)
DIM A (P710)
APPROACH WIDTH
DIM B (P711)
THROAT WIDTH/DIA.
FLOW (q)
BS3680 FLUME
