Siemens sitrans LU01 - Manual (Page 94)

Page 88 SITRANS LU01 – INSTRUCTION MANUAL 7ML19985BE02
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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 (2
minimum).
For combination curves (mostly linear but include 1 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:
• 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, ensure at least 2 breakpoints are entered immediately before
and after any sharp angle (as well as 1 breakpoint exactly at the angle) on the curve.
Maximum Process Speed
The SITRANS LU01 Maximum Process Speed (P003) to material level changes is
designed to exceed the most demanding installation requirements.
If any of these parameters are independently altered, a Max. Process speed parameter
alteration automatically changes the independently altered value.
Note: Slower Max. Process Speed provides greater measurement reliability.
Faster independently set Max Fill/Empty Rates may be impeded by Echo Lock,
Scan Delay and Shot Delay values.
level
volume