# CONVERSION

Guide Section: UNITS | EASAP Tree: USER INTERFACE UNIT MANAGERUSER UNITSDIMENSIONAL GROUP

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.

• There are two methods available for performing the conversion,
• Set Factor: to a number to multiply the BASE UNIT by
• Set expressions for Base to Unit: and Unit to Base: parameters

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:

• Base to Unit: (1.8*value) - 459.67
• Unit to Base: (value+459.67)/1.8

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). CONVERSION
Essential Parameters:
Unit:Name of new UNIT
Optional Parameters:
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:Factor to multiply BASE UNIT by to convert to UNIT 