Linear control signal
pressure) and the electrical , which should remain as constant as possible. Where this is not the case, it may prove helpful to store the target characteristic curve in a memory so the measured signal can be corrected
Capillary tube
resistors is mainly determined by the viscous fluid friction, geometry and pressure difference and may be calculated fairly accurately using Hagen-Poiseuille's law, since laminar flow is involved.
Ramp generator
resulting in a general voltage increase. The charging speed – and therefore the gradient of the ramp – may be influenced by a changing resistance (R).
Performance map
behaviour of the respective device in all operating states recorded by the parameters. Performance maps may be represented as Dürer's shell curves (Figure K 8 a) or in three dimensions (b) .
Internal leakage
It is not visible from the outside, but can involve a loss of power. With pumps, for example, this may be a flow of leaking oil from the high-pressure side towards the suction side, while leaks in directional
Signal
Physical variable to represent information, wherein selected carry information. The representation may relate to the transfer, processing and storage. It is only permitted to speak of signals in the context
Elastomer/energised plastic faced seal
comes from the ISO documentation. The terms occasionally used, such as sliding ring or seal-edge ring may be easier, but they do not address the key aspect.
Clogging behaviour of orifices
accumulate contaminations in the pressure fluid . This changes the flow characteristics, and the orifice may become completely clogged under certain circumstances. In general, the tendency to clog becomes greater
Resonance
systems close to the natural frequency , the resonance amplifies the oscillation amplitude, which may lead to self-destruction, even at lower power. In fluid technology, the resonance is primarily of
Signal generator
tool in measurement technology to generate reproducible test signals . As function generators, they may also simulate the effect of process-specific signals on a measured object.