摘要:
There is described a device for the transmission of data between a portable electronic unit and a field unit, whereby a cable is provided, connected at the one end thereof to the portable electronic unit and comprises a cable coupling piece at the other end thereof, for wireless proximity connection to a corresponding field unit coupling piece, such that the data and also the operating energy for the field unit sufficient for data transmission may be transmitted by means of the wireless proximity connection.
摘要:
The invention relates to a device for the transmission of data between a portable electronic unit and a field unit, whereby a cable is provided, connected at the one end thereof to the portable electronic unit and comprises a cable coupling piece at the other end thereof, for wireless proximity connection to a corresponding field unit coupling piece, such that the data and also the operating energy for the field unit sufficient for data transmission may be transmitted by means of the wireless proximity connection. The above has the advantage that the energy requirement of the field unit hardly rises above normal use consumption even when data is being exchanged with the portable electronic unit.
摘要:
The meter has a housing with an inlet and an outlet. The housing is divided between the inlet and the outlet by a partition wall through which a measuring tube with a rectangular cross-section passes. Gas flows through the measuring tube, through which ultrasonic pulses are simultaneously transmitted by transducers disposed on the end walls. The flow rate of the gas is determined from the difference in the time of flight of the bidirectional sound pulses. The gas is directed into the measuring tube through two guidance ducts which run along both longitudinal sides of the measuring tube. Said guidance ducts are also rectangular in cross-section and each contain a flow rectifier.