Endress+Hauser NXA820 - Page 41

Tankvision Calculations
Endress+Hauser 41
8.2.6 Correction for the thermal Expansion of the tank shell - CTSh
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• The Tank Shell expands and contracts with temperature changes (compared to TCT
calibration temperature)
• Some countries require CTSh (Correction for Tank Shell temperature effects)
For more details see → ä 52, Chapter "CTSh".
8.2.7 Floating roof adjustment - FRA
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Additional displacement due to the air is considered, see Net Weight in Air calculation.
8.2.8 Sump/pipe volume
The Volume of the sump and pipes is added.
8.2.9 Gross Observed Volume - GOV
Amb. Temp
Product Temp
Insulation Type
Steel Expa. coef
CTSh**
Calculate Tank
shell correction**
GOV is calculated like follows:
•Starting from the TOV
• Subtract FWV
• Multiply ba the thermal expansion correction factor
• Subtract the floating roof adjustment volume and
• Add the Sump/pipe volume
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FRA Mass(G)
WCF
(Ref. Density - 1.1
FRA Volume
FRA Volume
TOV
GOV
FWV
**
CTSh**
Sump/Pipe
Volume
+
-
-