An efficient monitoring concept with control charts for on-line sensors
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Author (Corporation)
Publication date
2002
Typ of student thesis
Course of study
Collections
Type
01A - Journal article
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Editor (Corporation)
Supervisor
Parent work
Water Science and Technology
Special issue
DOI of the original publication
Link
Series
Series number
Volume
46
Issue / Number
4-5
Pages / Duration
107-116
Patent number
Publisher / Publishing institution
IWA Publishing
Place of publication / Event location
Edition
Version
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Practice partner / Client
Abstract
A monitoring concept for on-line sensors will be discussed which helps the WWTP staff to detect drift-, shift- and outlier effects as well as unsatisfactory calibration curves. The approach is based on the analysis of comparative measurements between the sensor and a reference method. It combines statistical analysis such as control charts and regression analysis with decision support rules. The combination of two different detection levels in the selected Shewhart control charts with additional criteria allows one to detect ‘out-of-control’ situations early with an optimized measurement effort. Beside the statistical analysis the concept supports the operator with a graphical analysis to monitor the accuracy of on-line measurements efficiently. The widely applicable monitoring concept will be illustrated with examples for an ion-sensitive NH4+- and a MLSS-sensor.
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Event
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ISBN
ISSN
0273-1223
1996-9732
1996-9732
Language
English
Created during FHNW affiliation
No
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the complete publication
Open access category
Closed
License
Citation
Thomann, M., Rieger, L., Frommhold, S., Siegrist, H., & Gujer, W. (2002). An efficient monitoring concept with control charts for on-line sensors. Water Science and Technology, 46(4-5), 107–116. https://doi.org/10.2166/wst.2002.0563