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Option: General: Constants
See
also:
Analysis
View,
Expressions,
Examples
of Expressions,
Expression
Builder
In addition to referencing variables (values that can change over time and between scenarios), your expressions can also reference the values of constants (including your own user-defined constants). A default set of constants are included that define various molecular weight constants. These are particularly useful in defining emission factors.
Use the Constants screen to
view and edit the names and values of constants. Use the 
and 
buttons to add and deleted constants, and use the 
and 
buttons to change the
number of decimal places displayed on screen. Note that the basic molecular
weight constants are locked and cannot be deleted.