Null bias adjustment
dependent on the device. It is possible therefore to correct, for example, a null bias associated with the strain gauge at the Wheatstone bridge or trim this using lasers if a thin-film strain gauge is
Position measurement by potentiometer
its length ( Figure P 14 ). These days, position measurement by potentiometer is mainly performed with potentiometers featuring conductive plastic, which tend to offer better resolution than wire pote
Resonance
n, even at lower power. In fluid technology, the resonance is primarily of importance for systems with feedback () and in the case of sound generation.
Vertical column pressure gauge
Pressure gauge that operates based on the principle of the comparison of a pressure with the barometric pressure of a column of fluid (Figure F 23) . They are only suitable for measuring low pressures
Priority valve
3-way flow control valves are often used as priority valves for providing hydraulic steering systems with oil.
Predetermined breaking part (predetermined breaking point)
Part of a system, which is designed with the intention of breaking in the case of overloading in order to protect the rest of the machine. At the same time, it is to be arranged such that it is easy to
Sum pressure
valve, hydraulic motor). For valves : Sum of pressure p A and p B in the operating ports A and B with a consumer that is not subjected to load and hydraulic zero (DIN 24 311). The sum pressure gives an
Engine oil as hydraulic fluid
People would be perfectly happy to work with just one type of oil in mobile hydraulics, i.e. using the same oil in the both the engine and the hydraulics. This, however, is not advisable from either a
Controlled subsystem
a burden on the servo valve or proportional valve, the drive element, hydraulic motor or cylinder with the mechanical transfer elements ( Figure R 18 ).
Error tolerance
and are switched such that the replacement components automatically take over the function of a part with an error. A self-testing system ensures that an error that has occurred is detected immediately.