Variables can be entered in any available units. Any combination of independent properties can be used to determine a state. The phase composition, likewise, is determined as part of the state unknown. If multiple solutions exist for a given combination of input, appropriate warning is generated with the possible alternative solutions. Algebraic equations use the same syntax as in the Microsoft Excell spreadsheets, familiar to most users.
TEST goes to great length in making the daemons user friendly.
For instance, state variables are color coded - blue for thermodynamic properties, red for material properties, green for extrinsic properties and black for system variables. Moving the pointer over any variable displays its definition and its current value on the message panel. Different background colors are used to display the calculation status of each variable, green for the user input, cyan for the calculated values and gray for the deduction from the balance equations. TEST guides a user throughout a solution. Similarly if a balance equation is not satisfied through a solution, it is reported on the message panel. .