METHOD AND ASSEMBLY FOR MEASURING A FLOW PARAMETER IN OR ON A DEVICE THROUGH WHICH A FLUID CAN FLOW

摘要

The invention relates to an arrangement for measuring a flow parameter on or in a device (1) through which a fluid can flow by means of electronic sensors (2, 3), the flow parameter being determined directly or indirectly by at least two independent measuring systems (S1, S2) and wherein the two measuring systems (S1, S2) are designed so that they differ in at least one of the following properties: type of sensor (2, 3), installation position, tendency to contamination, long-term behavior. The invention also relates to a method for measuring a flow parameter on or in a device (1) through which a fluid can flow by means of electronic sensors (2, 3), in particular with an arrangement according to one of the preceding claims, the flow parameter being measured by at least two independent measuring systems ( S1, S2) is determined directly or indirectly and the measured values of the flow parameter and / or their temporal behavior are compared with one another in order to draw conclusions about contamination and / or temporal drift behavior of gain, linearity and / or zero point from deviations in the measured values from one another . The present invention is particularly suitable for regulating gas flows in heating devices operated with fuel gas and allows, for example, reliable and stable regulation of the mixing ratio of fuel gas and air over long periods of time.