Orifice
Local flow resistance with step cross-section constriction in which the ratio between the length l and the diameter d is relatively small (Figure B 18) : The smallest flow cross-section is outside the
DC measuring amplifier
Measuring amplifier on which a stable DC generator supplies the transducer with a supply voltage. This voltage is changed by the load on the sensor and supplied to the input stage on the amplifier. Th
Contact controls
Controls which link signals with each other using logic by means of contactors and relays — fitted with contacts. These days, contact controls only tend to be used for small-scale controls, i.e. those
Gear pump flow meter
Device used for flow rate measurement (flow measurement) according to the displacement principle, which works like a geared motor . The flow rate to be measured rotates the pair of gears. This movemen
Auxiliary signals
All signals, apart from the input signal , required for the functionality and monitoring of a device. These include dither signals , feedback signals, , testing signals and the like (DIN 24 311).
Bleed valve (Hy), exhaust valve (PN)
Device for removing undissolved air (gas) that may be carried in the hydraulic fluid in a hydraulic system . The valve must be fitted at the highest point in the system and can trigger automatically o
Pressure measuring procedures
General : Depending on the nature of the changes in the pressure, a differentiation is made between static and dynamic pressure measuring procedures. Static pressure measuring procedures are when cons
Contamination in operation
During the operation of a hydraulic system the particles of dirt that occur in the pressure fluid . They are either Added from the outside, e.g. due to leaks, a poor breather filter or are due to inad
Valve dynamics
Ability of a valve to transfer signals at a defined frequency. To quantify the valve dynamics, it was agreed to investigate the valve system with sinusoidal signals. Thus valve dynamics can be describ
Digital signals
Discrete signals with a finite number of value ranges for the signal parameter where each value range is assigned as a whole to a specific item of information. Digital signals can also have multiple p