Siemens HydroRanger 200 Manual de instrucciones descargar pdf (Pagina 229)

7ML19981FC01 HydroRanger 200 – INSTRUCTION MANUAL Page 215

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Appendix B: Tech Reference

Enter a Level Breakpoint at each point where the level/volume curve bends sharply (2

minimum).

For combination curves (mostly linear but include 1 or more arcs), enter numerous

breakpoints along the arc, for best volume calculation accuracy.

Universal, Curved

Set P050 = 10

This calculation creates a cubic spline approximation of the level/volume 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:

• 2 breakpoints very near the minimum level

• 1 breakpoint at the tangent points of each arc

• 1 breakpoint at each arc apex

• 2 breakpoints very near the maximum level

For combination curves, enter at least two breakpoints immediately before and after any

sharp angle (as well as one breakpoint exactly at the angle) on the curve.

Flow Calculation

The HydroRanger 200 provides numerous OCM flow calculation features (P600 to P611).

If the PMD (primary measuring device) does not match any of the eight preset PMD

calculations, or if a PMD is not used, select a Universal Volume calculation. Use the head/

flow graph or chart provided by the PMD fabricator (or create one based on the PMD or

channel dimensions).

Based on the graph, choose the Universal Flow calculation, and select the head versus

flow breakpoints to be entered (32 max). Generally, the more breakpoints entered, the

greater the flow calculation accuracy.

Universal, Linear

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.

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Siemens HydroRanger 200 Manual de instrucciones Pagina 229