Description: describes how humans intervene in a control system; Name: mode of operation
Description: characterization of the way and the extent to which the human operator intervenes in the control equipment; Name: operating mode
Description: Speed that characterizes a pump in terms of its speed, flow rate per impeller eye, i.e. total flow for single-flow impeller, half flow for double-flow impeller, at the best efficiency point and head per stage at maximum impeller diameter ; Name: Specific speed