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Many chemical
products are sold for their "effect" rather than their chemical
composition. In these cases, it is often difficult to provide reliable,
fast, on-line measurements to control product quality. The quality measure
may only be available as a laboratory analysis or very infrequently on-line.
This can lead to excessive off-specification products, especially when
changing from one operating region to another.
 Inferential
Measurement is a powerful and increasingly used methodology that
allows process quality, or a difficult to measure process parameter, to
be inferred from other easily made plant measurements such as pressure,
flow or temperature.
This set
of notes, which is a summary of material used in numerous post-experience
courses on Inferential Measurement and Control, should give you an idea
of
-
what is meant by Inferential Measurement
- how inferential
21 August, 2009
- how the
strategy can be used to enhance process operation and productivity.
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