Endress + Hauser Flowtec Ag

Jiri Karbula

Robert Lalla

Ole Koudal

Gernot Engstler

Andreas Fuz

Mohammed Khan

Jonathan Bailey

Chris Gimson

Neil Mottershead

A measuring arrangement of the invention includes: At least one measuring device, which generates, repeatedly during operation, measured values, especially digital, measured values, representing the at least one measured variable to be registered; as well as an electronic data processing system superordinated to the at least one measuring device, especially a data processing system which is spatially distributed and/or spatially remote from the measuring device. Measuring device and data processing system are connected together by means of at least two line-pairs, through each of which an electrical current flows, at least at times, during operation. According to the invention, the measuring device transmits the internally generated, measured values to the data processing system via both line-pairs. In this way, it is then possible to transmit a plurality of measured values simultaneously, when each of the two line-pairs is embodied as part of a two-conductor current-loop.

Measuring arrangement for registering chemical and/or physical, measured variables, as well as measuring device therefor

A measuring device with at least one control unit and an electrical current controller. The measuring- and operating electronics is connected to a current loop and the control unit is connected with the electrical current controller and provides the electrical current controller a reference input. The reference input corresponds to a desired value of the measurement signal current and the electrical current controller is suppliable with a primary feedback signal. The primary feedback signal corresponds to an actual value of the measurement signal current set in the current loop. The electrical current controller outputs a control signal formed from a control error signal, wherein at least one evaluation unit is provided, which compares at least one value of the control signal output by the electrical current controller with at least one reference value. The comparison indicates whether the value of the control signal exceeds or subceeds the reference value.

Measuring device with a measuring- and operating electronics for monitoring a measurement signal

With the E-I or E-E transformer, signals which are independent of each other are to be transferable simultaneously, without the signals interfering with each other. The E-I transformer has an E core (e, E&prime;), which has two outer legs (ES , ES ) and an inner leg (EM), and a yoke ( ) which combines with the E core to form a double closed magnetic circuit. A first coil and a second coil are wound around the inner leg (EM), and a third coil and a fourth coil are wound around one (ES ) of the outer legs. The E-E transformer has a first E core (E , E &prime;) and an identical second E core (E , E &prime;); each E core has two outer legs (ES , ES , ES &prime;, ES &prime;; ES , ES , ES &prime;, ES &prime;) and an inner leg (EM , EM &prime;; EM , EM &prime;); the E cores together form a double closed magnetic circuit and two outer links (ST , ST &prime;, ST , ST &prime;) as well as an inner link (STM, STM&prime;). A first coil and a second coil are wound around the inner link, and a third coil and a fourth coil are wound around the outer link ST , ST &prime;). The coils on each leg or link may be wound side by side or one above another. The coils on the inner leg or link and those on the outer leg or link form part of different AC power transmission paths.

E-I or E-E transformer

Growing community of inventors

Riehen, Switzerland

Jiri Karbula