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Measures for fault detection, fault localisation and fault indication. This can be achieved by the provision of state signals to the machine controls that, by means of comparison with the setpoints ,

Device in which the operation pressure p 1 of the primary pressure system is brought to a higher pressure p 2 in the secondary system. The pressure boost factor is given by the ratio of the primary an

Measurement for the acid content of a mineral oil . It indicates how many mg of potassium hydroxide are needed to neutralise in 1 g of oil the free acids generated during operation. Since the acid con

A transfer element is associated with non-linear behaviour if the relationship between the output and input signal cannot be described by a linear differential equation. Non-linear signal transmitters

Information on the operating viscosity characterises the viscosity range in which the entire system can operate. A differentiation is made between three key figures: Maximum start viscosity : Characte

Centre position

Valve which is closed in the rest position and opened when the flow rate is actuated. Opposite: normally open valve .

Provides information on the ratio of the maximum rotation speed of a hydraulic motor (hydrostatic transmission) to the minimum rotation speed: Here for n the still just "even" speed applies.

Combined piston

Above all on pressure valves the closing element (cone or piston) has a damping piston to prevent undesirable oscillations (chattering) (Figure D 3) . It must be designed such that the damping is only