Siemens sitrans LU10 - Measurement Response

Page 82 SITRANS LU10 – INSTRUCTION MANUAL 7ML19985AN02
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Technical Reference
Universal, Linear (P050 = 9)
This volume calculation creates a piece-wise linear approximation of the level / volume
curve. This option provides best results if the curve has sharp angles joining relatively
linear sections.
Enter a Level Breakpoint at each point where the level/volume curve bends sharply (two
minimum).
For combination curves (mostly linear but include one or more arcs), ensure numerous
breakpoints are entered along the arc, for best volume calculation accuracy.
Universal, Curved (P050 = 10)
This volume calculation creates a cubic spline approximation of the level/volume curve.
This option provides 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, ensure at least two breakpoints are entered immediately before
and after any sharp angle (as well as one breakpoint exactly at the angle) on the curve.
Measurement Response
The SITRANS LU10 Measurement Response (P003) to material level change is designed
to exceed the most demanding installation requirements.
volume
level
volume
level