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The importance of dynamic performance and testing of industrial thermometers in process control
Author(s) -
Chohan R. K.
Publication year - 1989
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270120160
Subject(s) - process (computing) , transient (computer programming) , a priori and a posteriori , emphasis (telecommunications) , dynamic testing , computer science , process control , reliability engineering , control engineering , statistical process control , engineering , process engineering , electrical engineering , philosophy , software engineering , epistemology , operating system
This paper considers the dynamic performance of instruments in control systems. Errors connected with transient measurements are discussed. It is shown that it is not always proper to assign common statistical properties to these dynamic errors. Emphasis is placed on temperature sensors. Common industrial thermometers are described and factors affecting their response discussed. An a‐priori dynamic performance prediction procedure is presented. This permits preinstallation estimation of response characteristics of sensors used in industrial processes. Sensors in service also require performance assessment since they can deteriorate with use. In‐situ testing is useful for this purpose and a recently develolped procedure is described.