Measured signal
signal (signal value) read off at the output of a measuring device and specified in units associated with the variable to be measured is known as the measured value . Depending on the position of the measured
Run up time constant To
50 kW axial piston motor would be around 0.2 s (the run up time constant To for an electric motor with the same power would be over 3 s).
Following control valve
cylinder , hydraulic motor ). If the setpoint changes, the positions of both valve elements will change with respect to each other until the difference to the actual value is zero again ( Figure N 1 ).
Hydrostatic transmission
Interaction of one or more pumps (primary element) with one or more (secondary element, in most cases a hydraulic motor). The distance between the two devices is of no significance (open transmission)
Amplifier card
activate a continuously adjustable valve (not just for amplifiers) are housed on a card (normally with a European format) ( Figure V 19 ). This includes not only control amplifiers, but also adjustment
Clamping pressure
Pressure p A or p B in the operating ports A or B with a load that is not subjected to load and hydraulic zero. The clamping pressure is then equal to half the sum pressure . This statement does not apply
Noise level (A-weighted) L pA
method known as A-weighting. Here, the signal is amplified differently across different frequencies, with the lower frequencies, to which the ear is less sensitive, amplified to a lesser extent, as shown
Sealing gap
If this matching is not possible, a back ring must used to bridge the gap. Gap between two chambers with different pressures. To prevent leakage either the gap must be designed such that no pressure flow
Bypass valve
Valve that is in parallel with a hydraulic unit and that permits the pressure fluid to bypass this unit under certain circumstances. Example: Pre-loaded check valve that is in the secondary flow for a
Multipass test
general ( retention rate, filtering grade ). This involves passing a specific mineral oil contaminated with quartz sand ( Air Cleaner Fine Test Dust (ACFTD) ) of various grain sizes through the filter to be