Description: Variable variable that is not influenced by the regulation or control in question, which is supplied to the control circuit or the control chain from outside and which the task variable is intended to follow in a predetermined relationship; Name: target size
Description: variable quantity, which is not influenced by the control but is introduced into the control system from outside with the aim of making the final controlled variable follow it in a given relationship; Name: command variable
Description: minimum mass of the liquid at design temperature divided by its volume, when stating the density, the unit of density used, together with the temperature, shall be explicitly given, for example kilogram per cubicmeter or gramme per mililiter at t°C (see the note). the standard reference temperature for international trade in petroleum and its products is 15°C (see ISO 5024), but other reference temperatures may be required for legal metrology or other special purposes; Name: minimum density at design temperature