Volume; Readings; Vessel Shape And Dimensions; Characterization Chart - Siemens SITRANS LUT400 Operating Instructions Manual

Volume

Volume is used in two situations:
1. Calculate and display volume instead of level.
2. Calculate pumped volume to accomplish the following:
• Totalize the volume of material that is pumped out of the wet well

Readings

When using volume, readings are given in units specified in

Vessel Shape and Dimensions

There are many common vessel shapes to select from. (See
possible, use one of these.) Each vessel shape uses the
calculations of volume.
Some vessel shapes also require extra dimensions to calculate the volume. Do not
estimate these values. They must be correct to ensure the accuracy of your volume
calculations.
Dimension A
Parameter
2.6.1. Vessel Shape
2.6.3. Maximum Volume
2.6.4. Dimension A
Notes:
• The default reading changes to a range from 0 to 100
• The process empty value is still measured to the bottom of the vessel (
Low Calibration Point
Dimension A.

Characterization chart

If you cannot use a pre-defined vessel, then use one of the universal vessel shapes and
program the characterization curve.
1. Plot a volume to height chart. Usually a vessel supplier will provide this chart.
However, if you have a custom-built vessel, then you will need access to complete
drawings of the well or accurate measurements.
A5E33329501
Example:
To configure volume for a vessel with a half-sphere bottom, set
the following:
Sample
Value
HALF SPHERE
BOTTOM
100
1.3
2.2.5. Far Range
plus any
SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS
2.6.2. Volume Units
2.6. 1 . Vessel Shape
2.2. 1 . Low Calibration Point
Description
selects the correct vessel shape
sets maximum volume at 100 (defined in
2.6.2. Volume Units
)
sets dimension A to 1.3 m
value), not the top of
.
. If
in its
2.2.1.
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