Abstract: A method for testing a measuring device using a reference measuring device, which is connected to a fieldbus system in a plant, to which fieldbus system, and a fieldbus access unit is connected. While testing the measuring device the measuring device remains connected to the fieldbus system and the measured values transmitted from the measuring device via the fieldbus system during the testing are transmitted by means of the fieldbus access unit to an evaluation unit, which evaluation unit is connected with the reference device, in order to compare the measured values of the measuring device with reference measured values of the reference measuring device.

Abstract: Self-monitoring flow measuring arrangement includes a pipeline system flowed through by a medium, a control device installed in the pipeline system on the inlet-side, which varies a flow rate of the total medium flowing into the pipeline system according to a predetermined time-dependent periodic change profile; at least one flow measuring device installed in the pipeline system, which is located at a measuring location, which is located downstream of the control device in the flow direction, and through which the entire medium flowing through the pipeline system flows, and which measures the flow rate (Q5(t), Q5a(t) Q5b(t) , Q5c(t) Q5d(t), Q5e(t)) of the medium at the measuring location; and a monitoring unit, which, based on the predetermined time-dependent change profile and the flow rates measured at the measuring locations (Q5(t), Q5a(t), Q5b(t), Q5c(t), Q5d(t), Q5e(t)), monitors whether the measured flow rates (Q5(t) Q5a(t), Q5b(t) , Q5cQ5d(t), Q5e(t)) follow the predetermined time-dependent change prof

Abstract: self-monitoring flow measuring arrangement includes a pipeline system flowed through by a medium, a control device installed in the pipeline system on the inlet-side, which varies a flow rate of the total medium flowing into the pipeline system according to a predetermined time-dependent periodic change profile; at least one flow measuring device installed in the pipeline system, which is located at a measuring location, which is located behind the control device in the flow direction, and through which the entire medium flowing through the pipeline system flows, and which measures the flow rate (Q5(t), Q5a, (t), Q5b(t), Q5c(t), Q5d(t), Q5e(t)) of the medium at the measuring location; and a monitoring unit, which, based on the predetermined time-dependent change profile and the flow rates measured at the measuring locations (Q5(t), Q5a(t), Q5b(t), Q5c(t), Q5d(t), Q5e(t)), monitors whether the measured flow rates (Q5(t), Q5a, (t), Q5b(t), Q5c(t), Q5d(t), Q5e(t)) follow the predetermined time-dependent change p