Physical Quantities
The Physichal Quantities Editor allows you to add or modify physical quantities.
When you open the editor, you will see the following window:
New Physical Quantity
In this example, we will add electric conductance to Dewesoft. After clicking the + button, we will enter the ID and click Add. We can use the - button to remove a custom physical quantity.
Derived SI Units
Now, we have to “translate” the unit we are adding to SI units. For electric conductance, the SI unit exponents are:
| SI unit | Exponent |
|---|---|
| m | -2 |
| kg | 1 |
| s | 3 |
| A | 2 |
Available in Measurements
Then, we can limit the measurements in which the custom physical quantity will be shown:
Units
Finally, we have to define units and the default unit system before saving. For default physical quantities, this is the only parameter you can alter.
For every unit, we need to define scale, operator, and offset for Dewesoft to be able to transfer between units:
- Scale - defines the ratio of the new unit to the default (first on the list)
- Operator - offset type: None, Add, Ratio, Log. Ref.
- Offset - amount
Example - Temperature
Save Changes
Once we’ve configured everything as described above, we press the Save button to store changes to the PhysicalQuantitiesX.xml file located in the Dewesoft System folder.
We can now see the new quantity in Channel setup:
