The P-V-T calculator is a stand-alone GUI program that allows you to perform simple calculations of pressure volume, V/V0, temperature etc.. By changing any of these variables the others are calculated instantly.Tells you the P when you have V and T (or any other combination of two from three).
It also directly calculates, for a given set of EoS parameters, elasticity parameters (i.e. K0, Kp, Kpp, normalized pressures, strain and alpha) at any P, V and T of your choice. You just need to type in the chosen value for any of the available variables (this depends on the type of EoS you have chosen) and it calculates P, V and T.
You can either type in the EoS parameters to the GUI, or you can load an .eos file from any other EosFit7 program.
If you load an .eos file that includes the esd's of the parameters (e.g. when the EoS has been determined by fitting data with EosFit), then the calculator will also calculate the esd's in P, V and T arising from the uncertainties in the EoS parameters (including the covariances between them), and it will calculate the uncertainties in the K and K' at the P and T of interest.
If you change any of the parameters by clicking first on the 'Define parameters' tick box, then the esd's are cleared from the program, because any change in parameters invalidates the esd's. It is not possible to enter esd's for parameters because that is not sufficient information; the entire variance-covariance matrix of the parameters is needed. The variance-covariance matrix can only be determined during simultaneous least-squares fit of the parameters. See Angel (2000a) for details.
The calculator has two tabs, one for PV EoS, and one for PVT, shown here: