7ML19985FC03 HydroRanger 200 – INSTRUCTION MANUAL Page 229
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Appendix B: Tech Reference
Universal, Linear [6 relay model]
Please note that the Universal, Linear feature is only available on the HydroRanger 200,
6 relay model.
Set P600 = 4.
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.
Enter a Head Breakpoint at each point where the head/flow curve bends sharply (2
minimum). For combination curves (mostly linear but include 1 or more arcs), enter
numerous breakpoints along the arc, for best flow calculation accuracy.
See also
Typical Flow Characterization
on page 81.
Universal, Curved [6 relay model]
Please note that the Universal, Curved feature is only available on the HydroRanger 200,
6 relay model.
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:
• two breakpoints very near the minimum head
• one breakpoint at the tangent points of each arc
• one breakpoint at each arc apex
• two breakpoints very near the maximum head
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