The Hydraulic System Properties component defines the properties of a hydraulic fluid as well as global settings for the hydraulic system.

In the model workspace, place this component at the same level as the hydraulic components or subsystem to which you want to assign the hydraulic fluid properties. For example, if you place this component at the top level of the model, the hydraulic fluid properties will apply to all of the hydraulic components and subsystems in your model. If you place this component within a subsystem, the hydraulic fluid properties defined in the component will apply to the hydraulic components in that subsystem only and all nested subsystems.

The global settings $p_{\mathrm{atm}}$ and $A_{\min }$ are used by some components to set the value of the atmospheric pressure and the minimum allowable orifice area.  As with the fluid parameters, these settings apply to all hydraulic components at the same or lower level in a subsystem hierarchy.

These parameters set the units used by the internal summary variables. See Hydraulic Summary Variables.