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: 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