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: measure of the increase in the liquid to be pumped, water, on a pipe connected vertically to the pump when the flow rate is zero. related to the operation of the pump at 2,900 rpm with the current impeller size; Name: pump shut-off head for actual impeller diameter at 2900/min