9.14 TEMPERATURE COMPENSATION AND VCF CALCULATOR
Use the Temp(erature) Comp(ensation) function to configure an API table for volume Correction for Temperature
of Liquid (CTL) and for volume Correction for Pressure of Liquid (CPL). This screen will also permit the entry of a
test temperature to calculate a CTL based on various temperatures. When a test temperature is entered, a VCF
will be calculated and displayed. The test temperature has no influence on normal operations.
1. From the Views & Inquiries Menu, choose Temp Comp. After selecting the preset and component, the VCF
Table Setup screen displays:
2. Highlight the API VCF Table Name row and press ENTER.
3. Press the Next or Previous key to scroll through the API table choices. Press ENTER to select the desired
table. Two parameter fields are added to the screen: one is API Test Temp; the other depends on the API
table selected.
4. Enter a test temperature value in the Test Temp field. This value is used to calculate a VCF on the bottom of
the screen for information purposes. The value entered in this field will have no effect on net calculations
during normal operation. Enter a value of zero until the remaining data is entered.
5. Depending on the API table selected, the next prompt will call for either a gravity, a density or an expansion
coefficient. When the user enters a value, the Calculated VCF will change accordingly. If the bottom line
displays, “API Input Data Out of Range!”, it is possible that the value entered is invalid for the selected API
table.
6. After a valid density, gravity or expansion coefficient has been entered, configuration for VCF is complete. At
this point, various test temperatures, densities and relative densities can be entered to view what VCF would
be used if the liquid’s temperature was of the same value.
Remark: In some case the UOM of measure is changeable when entering the number. After entering the number
and Enter it is possible with the next or previous key to change the UOM input type.
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