Once a DIMENSIONAL GROUP has been defined, additional units beyond the base unit can be defined by adding a Child CONVERSION. Each CONVERSION defines a new ‘Unit’ and the method for converting from the BASE UNITS to the new Unit.
The main example for the second method is temperature conversions. Let’s look at converting from F back to K.
The expressions to use are as follows:
In the first expression, the special object reference ‘value’ refers to the Base unit (K), while in the second expression, ‘value’ refers to the Unit (F).
|Name of new UNIT
|Base to Unit:
|Expression using 'value' to represent BASE UNIT that converts from BASE UNIT to new UNIT.
|Unit to Base:
|Expression using 'value' to represent new UNIT that converts from new UNIT back to BASE UNIT.
|Factor to multiply BASE UNIT by to convert to UNIT