摘要:
The invention relates to a method for operating a modularly constructed automation technology field device, which has a number of exchangeable electronics modules M1, M2 and which comprises software functionalities that can be enabled via a security code SC. According to the invention, it is verified whether one of the modules has been exchanged and whether one of the modules has a valid security code. A valid security code exists if the stored value of the security code matches a value calculated from the serial number of the field device. If a plausible serial number and a valid security code exist in one of the modules, the software functionalities are enabled according to the valid security code(s) SC. If no plausible serial number exists, all software functionalities that can be enabled via security codes are blocked.
摘要:
The invention relates to a method for transmitting measuring values between two measuring transducers (M1,M2) transmitting digital signals according to the master/slave principle, in addition to analog signals, to a control system acting as a master, via two communication links (KOM1,KOM2).The digital signals are also transmitted via an additional communication link (KOM3) between the two measuring transducers and the incoming digital signals are analyzed in the receiver- measuring transducer according to at least one characteristic value of the transmitting measuring transducer in order to ascertain the measuring values required for evaluation in the receiver-measuring transducer.
摘要:
The invention relates to a thermal measurement device for determining and/or monitoring the mass flow of a fluid medium (3) through a pipeline (2) or through a measurement tube, comprising at least two temperature sensors (11, 12) and a regulation/analytical unit (10), both temperature sensors (11, 12) being resistance elements of which one is of a design which may be heated, both temperature sensors (11, 12) are arranged In a region of a housing (5) facing the medium (3) and are in thermal contact with the medium (3) flowing through the pipeline (2) or measuring tube. The regulation/analytical unit is provided with two differing precision resistances (R1, R2), the first precision resistance (R1) having a first defined value (Y1) and the second precision resistance (R2) having a second defined value (Y2), wherein the regulation /analytical unit (10) assigns a measured resistance (Rx1; Rx2) determined on a resistance element (11, 12) a measurement value (Y1; Y2) lying on a straight line (g) running through two calibration points ((R1, Y1), (R2, Y2)) provided by two precision resistances (R1,R2) and the regulation /analytical unit (10) determines the mass flow through the pipeline (2) or the measuring tube from the measured values (Y1,Y2) provided by the temperature sensors (11, 12).
摘要:
The invention relates to a hybrid electrode (Fig. 1c) for use in magnetic-inductive flowmeters, characterized in that the hybrid electrode is fabricated from a base and an electrode head, wherein the electrode head is produced by a method based on selective material application and is integrally connected to the base body, at least in the edge region.
摘要:
The invention relates to a method for operating a modularly constructed automation technology field device, which has a number of exchangeable electronics modules M1, M2 and which comprises software functionalities that can be enabled via a security code SC. According to the invention, it is verified whether one of the modules has been exchanged and whether one of the modules has a valid security code. A valid security code exists if the stored value of the security code matches a value calculated from the serial number of the field device. If a plausible serial number and a valid security code exist in one of the modules, the software functionalities are enabled according to the valid security code(s) SC. If no plausible serial number exists, all software functionalities that can be enabled via security codes are blocked.
摘要:
The invention relates to a method for transmitting measuring values between two measuring transducers (M1,M2) transmitting digital signals according to the master/slave principle, in addition to analog signals, to a control system acting as a master, via two communication links (KOM1,KOM2).The digital signals are also transmitted via an additional communication link (KOM3) between the two measuring transducers and the incoming digital signals are analyzed in the receiver- measuring transducer according to at least one characteristic value of the transmitting measuring transducer in order to ascertain the measuring values required for evaluation in the receiver-measuring transducer.
摘要:
Disclosed is a vortex flow sensor (1; 1') for measuring the mass flow rate, volumetric flow rate, or flow velocity of a fluid which flows within a measuring tube (2; 2') comprising a tube wall (21; 21'). Said vortex flow sensor (1; 1') is provided with two temperature sensors (34, 35; 34', 35') which are disposed such that the vortex flow sensor (1) can also be used with fluids that would corrode the temperature sensors (34, 35; 34', 35'). A baffling member (4; 4') creating vortices and therefore pressure variations is arranged inside the measuring tube (2; 2'). A vortex sensor (3; 3') that responds thereto is inserted into a borehole (22; 22') of the wall (21) of the measuring tube (2; 2'), which is located downstream of the baffling member (4; 4'). Said vortex sensor (3; 3') comprises a sensor vane (31) which protrudes into the fluid and within a pocket hole (314) of which the temperature sensors (34, 35) are disposed. Alternatively, the temperature sensors (34', 35') can be disposed within a pocket hole (314') of the baffling member (4').