Description: input variable of a comparison element of a control device which is derived from the target variable and defines the desired value of the controlled variable; Name: reference variable
Description: input variable to a comparing element in a controlling system, which sets the desired value of the controlled variable and is deducted from the command variable; Name: reference variable
Description: norm describing the material. The material number is taken from this norm. Type and number of the norm with issue year and issue month must be given; Name: Reference norm material of the valve ball/valve cone