Unit groups

Units are measurement units (like m, s, kg, and so on). They are further grouped into unit groups. A unit group comprises units of a similar type (length-related units; mass-related units, and so on).
You can open unit groups by double clicking. In the editor you can make changes. If you want to change the default flow property, use the red cross and select another flow property. If you add or delete units in the unit group use the plus or cross symbol. You can also change the reference unit set the check mark at a different unit.

Creating a new unit group

If you want to create a new unit group, the wizard looks like the following screenshot.

Lets enter a „test unit group”, and a „test reference unit” as reference unit. Note that the entries are validated and missing entries are highlighted.

A reference unit is used in the process system calculation: All units within a unit group are transformed, prior to calculating the system, to the reference unit. Therefore, every unit group needs a reference unit.

This is the resulting view of the test unit group. You can press the plus symbol to add additional units:

The conversion factor expresses the relation to the reference unit. Here, as always, a decimal must be a point (and not a comma as in e.g. German). This is also checked.

Note that once you have changed anything on an element, it is marked with a * and you need to save it in order to let the changes take effect.

Once it is changed, the element becomes visible in the category tree on the left.