Hydraulic fluid power. Determination of pressure ripple levels generated in systems and components. Method for determining source flow ripple and source impedance of pumps|Flow rates, Pressure measurement (fluids), Hydraulic transmission systems, Accuracy, Positive-displacement pumps, Fluid outlets, Valves, Wave propagation, Fluid equipment, Fluid equipment components, Testing conditions, Fluid inlets, Installation, Calibration, Interpolation, Fluid engineering, Fluid pressure, Flow measurement, Hydraulic equipment, Circuits, Pumps, Power transmission systems, Frequencies, Test equipment, Linearity, Pressure equipment