Tankvision Calculations
Endress+Hauser 39
8.2.1 Calculated Gauge Volume
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The Calculated Gauge Volume is determined with the level information and the Tank
Capacity Table (TCT). The Calculated Gauge Volume is the volume observed at the present
(temperature) conditions without considering the hydrostatic deformation of the tank.
The TCT is a tank specific table created by calibration holding the level to volume transfer
information. To differentiate the TCT for the Product and for the Water the TCT gets marked
with a P (P-TCT).
The level information needed for this step is in innage which is the normal way the level is
transferred from the gauge. In case the gauge inputs ullage to the system a calculation into
innage is necessary beforehand (Ullage subtracted from Mounting position).
8.2.2 Static Pressure Correction Volume - VSP
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The VSP is determined with the level information and the static pressure correction table
(VSP-table). The VSP is the volume the tank expands at the actual level if it would be filled
with water (wet calibration).
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