Endress+Hauser NXA821, Руководство по эксплуатации, Страница: 33 / 76

Tankvision Calculations
Hauser 33
Palm oil
L00-NXA82xxx-16-00-00-xx-052
For the VCF we can easily derive: VCF= D
Obs
/D
ref
L00-NXA82xxx-16-00-00-xx-053
VCF Calculation
• The API/ASTM Tables are a "primary" need for any Tank Inventory system
The correct table for the product must be chosen.Together with the Product temperature and
reference density the VCF can be calculated.
In addition to the VCF the observed density can be calculated.
8.1.8 Gross Standard Volume - GSV
L00-NXA82xxx-16-00-00-xx-048
The Gross Standard Volume is calculated by applying the VCF to the GOV.
D = K + K T + K (T ) + K (T ) + K (T )
Obs 0 1 Obs 2 Obs 3 Obs 4 Obs
´ ´ ´ ´
2 3 4
D = K + K T + K (T ) + K (T ) + K (T )
ref 0 1 ref 2 ref 3 ref 4 ref
´ ´ ´ ´
2 3 4
K + K T + K (T ) + K (T ) + K (T )
0 1 Obs 2 Obs 3 Obs 4 Obs
´ ´ ´ ´
2 3 4
K + K T + K (T ) + K (T ) + K (T )
0 1 ref 2 ref 3 ref 4 ref
´ ´ ´ ´
2 3 4
VCF =
Product temp .
Table & Product
Code
Ref . density
VCF
Obs . Dens .
A PI /A STM
7.
Volume Correction
Factor calculation
GOV
VCF
GSV