Instruction manual

Page 95
Calculations
A BSOLUTE
If the flow calculation is to be absolute P702 = 1 the flow will be calculated
using the formula (s) as follows:
Exponent Type
Formula
Exponent
K Factor
Suppressed
Rectangular
Weir
(Without End
Contractions)
Q=KLh
x
Where:
Q =Flow
K=K factor
L=crest length of weir
h=head
x
=exponent
1.50
Automatically
selected by
Flow Oracle
Automatically
calculated,
dependent on
measurement,
flow and time
units chosen.
Cipolletti
(Trapezoidal)
Weir
Q=KLh
x
Where:
Q =Flow
K=K factor
L=crest length of weir
h=head
x
=exponent
1.50
Automatically
selected by
Flow Oracle
Automatically
calculated,
dependent on
measurement,
flow and time
units chosen.
Venturi Flume
Q=Kh
x
Where:
Q =Flow
K=K factor
h=head
x
=
exponent
1.50
Automatically
selected by
Flow Oracle
Enter value of
K Factor (P718)
as required
Parshall Flume
Q=Kh
x
Where:
Q =Flow
K=K factor
h=head
x
=exponent
Automatically
calculated
dependent on
throat size
(P719)
Automatically
calculated,
dependent on
throat size and
measurement,
flow and time
units chosen.
Leopold Lagco
Flume
Q=KD
0.0953
h
x
Where:
Q =Flow
K=K factor
D=pipe diameter
h=head
x
=
exponent
1.55
Automatically
selected by
Flow Oracle
Automatically
calculated,
dependent on
measurement,
flow and time
units chosen.