Creates the link between a proportion unit or a product unit and the corresponding physical unit if the proportion unit or product unit does not belong to a dimension.
The reference unit of measure is used for dimension-related conversions between various proportion and product units.
If the proportion or product unit belongs to a dimension, the reference unit of measure is only used if you define percentage proportions for a material. In this case, you have to assign to the proportion unit a reference unit of measure which belongs to the same dimension unit as thebase unit of measure. This allows you to convert from the proportion unit to the base unit of measure.
Proportion/Product Units With Reference to a Physical Unit
Proportion/Product Units Without
Reference to a Physical Unit