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Datamate 2200 O&M
Page 37
7.9 API
Datamate 2200 allows to measure density in degrees API. API gravity measures the
relative density of liquid petroleum products, where 10°API is equivalent to the specific
gravity of water. In order to provide these measurements, Datamate 2200 contains
Volume Correction Factor (VCF) tables
1
for several petroleum products as well as a
custom table that the user can load. The API correction tables provided are for 5 different
petroleum products at two different temperature references: 60°F and 15°C. The custom
table allows to input a maximum of 100 pairs of Temperature and VCF.
Fuel Oil (840) @ 60°F
Fuel Oil (840) @ 15°C
LPG (505) @ 60°F
LPG (510) @ 15°C
Gasoline (730) @ 60°F
Gasoline (730) @ 15°C
Kerosene (820.1) @ 60°F
Kerosene (820.1) @ 15°C
Light Lube Oil (878) @ 60°F
Light Lube Oil (878) @ 15°C
Custom Table
The standard temperature, i.e. the temperature at which the density of water is taken as
the reference to calculate specific gravity, will depend on the temperature unit selected
in the temperature configuration menu. If the temperature selected is °F, the standard
temperature will be 60°F and the reference density used will be 0.999042 g/cc. If the
temperature selected is °C, the standard temperature will be 15°C and the reference
density used will be 0.999129 g/cc.
NOTE: It is important to be consistent in selecting the correct temperature unit
that matches the Volume Correction Factor table. For example, if the temperature
unit is °F, but the VCF table selected is “Fuel Oil 840@15°C,” the degrees API and
Standard Volume measurements will not be correct.
If the measured process temperature is outside the range of the values given in the
correction table for the selected product class, the correction factor for the nearest
temperature in the table will be used.
Correction
Temperature
Factor
T
1
VCF
1
T
2
VCF
2
...
...
T
99
VCF
99
T
100
VCF
100
1
API Standard 2540 (1980).
Содержание Datamate 2200
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