Siemens HydroRanger 200, Инструкция по эксплуатации

Страница: 238 / 280

Page 228 HydroRanger 200 – INSTRUCTION MANUAL 7ML19985FC03
mmmm
m
Appendix B: T
e
c
h
Ref
e
re
nce
Universal, Curved [6 relay model]
Please note that the Universal, Curved feature is only available on the HydroRanger 200, 6
relay model.
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:
• two breakpoints very near the minimum level
• one breakpoint at the tangent points of each arc
• one breakpoint at each arc apex
• two 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 [6 relay model]
Please note that the Flow Calculation feature is only available on the HydroRanger 200, 6
relay model.
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.