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Conversion Type
Weir
V- Notch Weir
Rectangular Weir with End
Contractions
Rectangular Weir without End
Contractions
Cipoletti Weir
Flume
Palmer-Bowlus Flume
Parshall Flume
Trapezoidal Flume
"H" Flume
Equation
Q = a x H
Data Points
User-developed tables for level-to-flow
rate. Includes data points from a user
derived flow profile.
Manning Equation
Round Pipe
U-Channel Pipe
Rectangular Pipe
Trapezoidal
Flow Metering Insert
Round
2.5 Alternative Flow
Measurement Systems
The following table contains programming information for each
of the conversion types.
Table 2-1 Flow Conversion Types
Device, Formula, or Table
b+c
d
x H
V-Notch
Because of the characteristics of bubbler flow measurement,
there may be some installations where the bubbler method is
either unreliable or inaccurate. In these instances, it is worth-
while to consider using an alternate method of flow mea-
surement.
In addition to the 730 Module, Teledyne Isco offers three other
types of plug-and-play flow modules in the 700 Series: the 720
Submerged Probe Module, the 710 Ultrasonic Module, and the
750 Area-Velocity Module.
Information about these flow modules is available from the
factory. Call for more information or visit our Web site at
www.isco.com.
Section 2 Programming the Module
Size or Parameters
22.5, 30, 45, 60, 90, 120 degrees
Crest length
Crest length
Crest length
4, 6, 8, 10, 12, 15, 18, 21, 24, 27, 30, 48 inches
1, 2, 3, 6, 9 inches
1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12 feet
Large 60-degree V
2-inch, 45-degree WSC
12-inch, 45-degree SRCRC
0.5, 0.75, 1, 1.5, 2, 2.5, 3, 4.5 feet.
Q = flow
H = head
a, b, c, & d = entered values
3 to 50 data points
Slope, Roughness, Diameter
Slope, Roughness, Width
Slope, Roughness, Width
Slope, Roughness, Bottom Width, Top Width
6, 8, 10, 12 inch
6, 8, 10, 12 inch
730 Bubbler Module
2-7
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