ULTRATWIN (UL)
INSTRUCTION MANUAL
82
Calculations
Absolute
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*
Where:
Q=Flow
K=K Factor
L=Crest length of weir
h=head
*=exponent
1.50
Automatically
selected by the
UltraTWIN
Automatically
calculated,
dependent on
measurement,
flow and time
units chosen.
Cipolletti
(Trapezoidal Weir)
Q = KLh*
Where:
Q=Flow
K=K Factor
L=Crest length of weir
h=head
*=exponent
1.50
Automatically
selected by the
UltraTWIN
Automatically
calculated,
dependent on
measurement,
flow and time
units chosen
Venturi Flume
Q=Kh*
Where:
Q=Flow
K=K Factor
h=head
*=exponent
1.50
Automatically
selected by the
UltraTWIN
Enter value of
K Factor (P718)
as required
Parshall Flume
Q=Kh*
Where:
Q=Flow
K=K Factor
h=head
*=exponent
Automatically
calculated,
dependent on
throat size
(P719)
Automatically
calculated,
dependent on
measurement,
flow and time
units chosen
