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公开(公告)号：EP3377861B1
公开(公告)日：2019-09-04
申请号：EP16788473.3
申请日：2016-10-21
发明人： HEITZ, Ulrich , KOCH, Daniel , STAHL, Marc
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2.发明公开
公开(公告)号：EP3377861A1
公开(公告)日：2018-09-26
申请号：EP16788473.3
申请日：2016-10-21
发明人： HEITZ, Ulrich , KOCH, Daniel , STAHL, Marc
CPC分类号： G01D18/006 , G01K15/005
摘要： The invention relates to a method for the in situ calibration of an analog measurement transmission path (1) while determining and/or monitoring a process variable of a medium. Analog electric signals are transmitted from a regulating/analysis unit (21) to a control unit (3) via the measurement transmission path (1), and the regulating/analysis unit (21) is paired with a sensor (2) which determines and/or monitors the process variable using at least one component (22) which is sensitive to the process variable. The sensor (2) is operated either in a measurement mode or in a simulation mode. In the measurement mode, the regulating/analysis unit (21) converts the measurement values of the at least one sensitive component (22) of the sensor (2) into an analog electric signal which represents the process variable. In the simulation mode, the regulating/analysis unit (21) outputs at least one analog electric signal which is clearly recognizable as being simulated and which is detected and captured by the control unit (3) for a set period of time, and the measurement transmission path (1) is calibrated, wherein the control unit (3) determines the deviation between the analog electric signal specified by the regulating/analysis unit (21) and the detected analog electric signal.
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