The Limit Units column specifies the units in which the constraint values in the Limit column are defined. For some Constraint Types the column will be predefined depending on the constraint. However, for fuel or emission types, all units in this column must also be defined in the Unit Conversion table and column will feature a dropdown of options when the Unit Conversion table is selected 'In Study'. For example, to define emissions limits as metric tons select "tonnes" or for short tons (2,000 pounds per ton) select "tons".
Limit Units Column