Technical reference
A.10 Flow calculation
HydroRanger 200 HMI
Operating Instructions, 06/2018, A5E36281317-AC
309
Based on the graph, choose the Universal Flow calculation, and select the head versus flow
breakpoints to be entered (maximum of 32). Generally, the more breakpoints entered, the
greater the flow calculation accuracy.
Universal linear
Set PMD dimensions (2.13.5.) (Page 246) = Universal Linear Flow Calculation.
This flow calculation creates a piece-wise linear approximation of the head/flow curve. This
option provides best results if the curve has sharp angles joining relatively linear sections.
①
Head vs Flowrate
⑤
Zero flow
②
Max. Head
⑥
Flow
③
Head
⑦
Max. Flow
④
Zero Head
Enter a Head Breakpoint at each point where the head/flow curve bends sharply (minimum
of two). For combination curves (mostly linear but include one or more arcs), enter numerous
breakpoints along the arc, for best flow calculation accuracy.
For more information, refer to Typical flow characterization (Page 151).
Universal curved
This calculation creates a cubic spline approximation of the head/flow curve, providing best
results if the curve is non-linear and there are no sharp angles.
Select at least enough breakpoints from the curve to satisfy the following:
Содержание HydroRanger 200 HMI
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