Spana  SPANA

SPANA: Making a Diagram
(run SED or PREDOM)

A diagram may be made using either of the menu “Run / make a Diagram” or “File / Data file / Open (make a diagram)” in the main SPANA window. A new window appears where you can enter all parameters needed to make a diagram with SED/PREDOM:

Select_Diagr_Type

Data File Name: It is possible to change the input file by clicking this field.

Diagram Name: Enter a name for the plot file.

Diagram:

  1. Select first a diagram type from the pull-down menu
  2. Change the component(s) in the X- and Y-axis. Change the axes min/max values by clicking on them and entering new values.
  3. For redox systems (containing “e−”), decide to choose pe or redox potential (Eh) by clicking the corresponding check-box.
  4. Title: If you have selected advanced program level (in the menu Preferences / General options) you may enter a title for the diagram.

Concentrations: Change the concentration for each component by clicking on their line within the list-box.

Parameters: The default values for the parameters can be set by clicking on the “Save as defaults” button. Note that some of the parameters listed below might not appear in the window, depending on the type of diagram selected and program level (normal or advanced in the menu Preferences / General options).