Continuous quality control of measurements in a real time controlled sewer system in the municipality of Copenhagen

Experience has shown that RTC systems are vulnerable to failures in the on-line monitoring system. It is therefore crucial to have a small and well functioning monitoring system than a larger monitoring system with many failures. This paper describes the results of a project with the aim of investigating the on-line monitoring system 4 years after put into operation. The outcome was a cut down in the number of on-line level transmitters and an automatic routine for detecting failures in the level transmitters. The routine has been programmed into the SCADA system and checks for 15 commonly occuring errors. Furthermore, an automatically generated report prints out statistics for larger rain events.