This International Standard specifies the methods for determin-ing the derived capacity of fluid power positive displacement hydraulic pumps and motors under steady-state conditions and at defined, continuously rotating shaft speeds.
The unit may be tested as a pump, with mechanical energy ap-plied to the shaft and hydraulic energy obtained at the fluid connections, or as a motor, with the hydraulic energy supplied to the fluid connections and mechanical energy obtained at the shaft.
Accuracy of measurement is divided into three classes (A, B and C) which are explained in annex A.