ASTEM97M V2 for Mathcad-Pro

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1. The result matrix "c", in the handbook file for xprp97mc, does not display properly. Under Format, Results, Display Options, Matrix display style, select "Matrix"
2. Can I obtain properties results for pressures less than 611.213 Pa? Yes.  You can call the IF97 Region 2 or Region 5 functions, based on temperature, with pressure less than 611.213 Pa.  For example, v := spvl97mc(100 , 300 , 2) to get the specific volume at p = 100 Pa, T = 300 K in IF97 Region 2).  However, note that there is a minimum pressure below which the internal math calculations may fail.  The ASTEM97 implementation, particularly for the backward equations, is based on a minimum pressure of 611.213 Pa.
3. How are function errors handled? See the Section "Function Error Trapping" in the User's Guide.  A series of examples may be viewed as an Adobe pdf file.
4. Bug fix
See  What's New  under documentation for Bug fix to iprs97mc

 

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