Abstract:
A method for operating a measuring point for determining at least one measured variable of a medium, wherein the measuring point includes a base unit, which is connected releasably with a sensor unit, and which is provided for communication of a signal representing the value of the measured variable to a process monitoring facility. The following steps are included: at least one-time registering and storing, in a first data storage unit of the base unit, of a value of a diagnostic parameter stored in the sensor unit or produced by the sensor unit; on the basis of the at least one value of the diagnostic parameter stored in the first data storage unit, conforming a prognosis value or prognosis interval stored in a second data storage unit of the base unit, and storing the conformed prognosis value or prognosis interval in the second data storage unit of the base unit in place of the previously stored prognosis value or prognosis interval.
Abstract:
A method for determining a failure rate of an electrochemical sensor type for a process, wherein the process is defined by determined values, or value intervals, of a plurality of specified process parameters, and wherein a plurality of defect types is specified for the sensor type, comprising steps as follows: assigning, by means of expert knowledge, a defect rate to each combination of one of the values, or value intervals, of the specified process parameters and one of the specified defect types; and calculating the failure rate of the sensor type according to a calculational specification with application of the defect rates assigned to the combinations of a value, or value interval, of a process parameter and a defect type.
Abstract:
A sensor for registering a measured variable of a medium, especially in a bioprocess. The sensor includes a sensor body, wherein at least one surface section of the sensor body can be supplied with the medium, and wherein a condition of this surface section affects the measured value. The sensor is characterized by the fact that the surface section contains a substance with biocidal properties.