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User Manual MON20/20 Software for Gas Chromatographs
3-9000-745 SEPTEMBER 2010
4-54
• Constants - Allows you to select constants from a drop-down
list.
• Temporary Variables - Allows you to select temporary, user-
created variables from a drop-down list.
• System Variables - Allows you to select system variables.
• Edit Temporary Variables - Allows you to create variables.
• Edit Constants - Allows you to create system-wide constants
that can be used in user-defined calculations.
• Section F - This section, called the Output Display, displays
status information.
5. Use the following procedures to build your calculation in the
Calculation Steps Viewer:
• “Inserting a Comment” on page 4-54
• “Inserting a Conditional Statement” on page 4-56
• “Inserting an Expression” on page 4-59
• “Creating a Constant” on page 4-61
• “Creating or Editing a Temporary Variable” on page 4-63
• “Inserting a System Variable” on page 4-64
• “Using User-defined Calculations” on page 4-65
6. To see the result of the calculation, click Calculate. The results
display in the Output window. To validate the calculation for errors,
click Evaluate. The results of the validation check display in the
Output window. To save the calculation and to close the Edit User-
defined Calculation window, click OK.
7. On the User Defined Calculations window, to save the changes
without closing the window, click Save. To save the changes and close
the window, click OK.
4.6.1 Inserting a Comment
To add a comment to the calculation, do the following:
1. Click on the Insert drop-down list and select Insert Comment. A
new line will be added to the Calculation Steps Viewer and the
Expression Editor will switch to Edit Comment mode.