ROFA

Laboratory & Process Analyzers

Mag. Matthias Fiedler

A-3420 Kritzendorf

Laboratory & Process Analyzers

A-3420 Kritzendorf

ASTM D1250-04 Software for Pocket PC

(Temperature and pressure volume correction factors for generalized crude oils, refined products, and lubricating oils.)

First enter the observed temperature and pressure conditions and the measured density. The volume may be entered optionally. The “observed” condition is the temperature and pressure at which the density of a liquid is actually or assumed to have been measured. Calculations can then be performed to correct this observed density to any other temperature and pressure conditions. If the density has already been corrected to base conditions, you would enter the base temperature and pressure in the Observed Conditions fields. If the density has not already been corrected to base conditions, you enter the temperature and pressure at which the density was measured.

Second enter the base temperature and pressure conditions. The “standard” or “base” condition is a defined combination of temperature and pressure at which liquid volumes are expressed for purposes of custody transfer, stock accounting, etc. The terms standard and base are used interchangeably. Accepted standard temperatures are 60°F, 15°C and 20°C. Accepted standard pressures are zero gauge pressure (for non-volatile liquids at the standard temperature) or the liquid's vapour pressure at the standard temperature (for volatile liquids).

You can use the buttons on the bottom of the tab control for predefined values.

Third enter the alternate temperature and pressure conditions. The “alternate” conditions are any other temperature and pressure conditions to which the observed or standard density can be corrected. The input of a volume is optional, but if you have already entered a observed volume, you must not enter an alternate volume.

Finally select the units for the compressibility coefficient (Fp), base and alternate densities and press the Calculate button.

The result screen shows the calculated CTL (Correction factor for the effect of Temperature on the Liquid), CPL (Correction factor for the effect of Pressure on the Liquid), CTPL (Correction factor for the effects of Temperature and Pressure on the Liquid, Volume Correction Factor VCF), Fp (Compressibility coefficient), base and alternate density and, if you have entered a observed or alternate volume, the base and alternate volumes.

For more information go to the download page.