Acceleration measurement
measurement is made using either seismic (inductive) sensors (Figure B 12) or using force sensors based on piezoelectrics. The processing of accelerations is becoming more important for modern control systems
Kv value (of valves)
Flow in m3/h of water at +5 to +30°C passing through a device (valve) in a given direction based on a pressure drop of 1 bar and an upstream pressure of 6 bar. The practical benefits of the Kv value (of
Measuring procedure (system)
measuring procedure or direct or indirect measuring methods . The choice of measuring procedure is based on the following criteria: required measuring accuracy (resolution, hysteresis), measuring range
Automatic retrim
that are necessary for the re-optimisation of can be defined in schemas and described by formula-based relationships. In this way they can be transferred to a microcomputer that then automatically undertakes
Dirt holding capacity
cumulative efficiency is also used to assess the dirt holding capacity, because if two equal values are based on different cumulative efficiencies, they are not comparable (see ISO 4572). The term "apparent"
Measuring instruments
(measuring instruments performing registration or counting tasks, measuring instruments with a display based on a scale or digits) and measuring instruments involved in some kind of transmission (measuring
Hydrostatic transmission
confined space, the term used is integral hydrostatic transmission . A hydrostatic transmission may be based on the combination variable pump fixed displacement motor , ( primary control ), constant pump variable
Run up time constant To
external torque, the time constant To max is a characteristic for the motor control valve system. Based on ⅔ of the motor's rated speed, the run up time constant To for, say, a 50 kW axial piston motor
Jet pipe amplifier
Hydro-mechanical converter (amplifier) system for servo valves , which is based on the conversion of kinetic energy to static energy. A jet pipe, which can be actuated by an electro-mechanical converter
Thermodynamic measuring
temperature and pressure measurements . It uses the hydraulic fluid to carry the information and is based on energy contents and balances. It does not depend on the performance variables of the system. T