Siemens HydroRanger 200 HMI Operating Instructions Manual page 192

2. 1 3.4. 1 . Flow Exponent
If
a straight line
2. 1 3.4.3.
Maximum
Flow
Zero flow
2.13.4.2. Maximum Head
2.13.4.3. Maximum Flow
Page 182 HydroRanger 200 HMI – OPERATING INSTRUCTIONS
= 1, the flow characteristic is
Example exponents
PMD Type
Suppressed Rectangular Weir
Cipolletti Weir
Venturi Flume
Parshall Flume
Leopold Lagco
V-Notch Weir
Sets the level value associated with Maximum Flow, in 2.1. 1 . Units.
Single-point model
Index
Global
Range: -999 to 999999
Values
Preset:
2. 1 . 1 . Units
•
Altered by
2. 1 3.2. Primary Measuring Device
•
2. 1 3.4.3. Maximum Flow
•
Related
2. 1 3.4.5. Zero Head
•
This represents the highest head level supported by the PMD and
works in conjunction with
highest point in the exponential curve. Use it when the PMD requires
a maximum head and flow reference point. This would include
Exponential, Palmer-Bowlus Flume, H-Flume, and Universal
breakpoints.
Sets the maximum flowrate associated with 2. 1 3.4.2. Maximum Head.
Single-point model
Index
Global
A word on exponents
The exponential equation is
2. 1 3.4. 1 . Flow Exponent
Q = KH
Where:
Q = flow
K = internal constant
H = head
Exponent (sample only)
1.50
1.50
1.50
1.22 to 1.607
1.547
2.50
Dual-point model
Transducer
2.2.2. Span
value
2.13.4.3. Maximum Flow
Dual-point model
Transducer
to define the
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