Method for monitoring sensor function

Abstract

A method for monitoring sensor functionality comprising the steps of: repeatedly obtaining a dataset comprising sensor-specific calibration data; storing the acquired dataset comprising sensor-specific calibration data; analyzing the temporal development of the calibration data based on the stored dataset; And the time until the next calibration or the time weighted by the load factor is determined at least from the temporal development of the calibration data. The resulting point in time or the determined time weighted by the load factor can be output in a suitable form, for example immediately after determination, so that the calibration can be planned in the long term and / or the resulting point in time or the determined time weighted by the load factor can be Stored as data or remaining time. By comparison with a time signal or by counting down the remaining time, a request signal can be output on the due date, which can optionally also have a desired lead time.

Description

technical field

[0001] The invention relates to a method for monitoring the function of a sensor, in particular a potentiometric sensor. Background technique

[0002] For process measuring points for process optimization or monitoring and observation of limit values, the most important requirements are simple operation, safety and reliability. Today, measuring points provide the operator with measured value information and, in some cases, additional information about the current condition of the system. In this case, for example, it is monitored whether a limit value is currently exceeded or whether a sensor-specific parameter (eg glass resistance of a pH sensor) is complied with. Thus, what is monitored is the current event. As far as plants are concerned, faults or interruptions cause costs that are much higher than the price of the sensors, and it is very important that faults at the measuring point be pre-empted as far as possible, where correct and guaranteed measured...

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