Exercise M
111
Set the PSV back to 0%, and continue to control the temperature within the vessel.
Select the
icon to finish data logging.
Create a new results sheet by selecting the
icon.
Results
For easy identification or results, it is suggested that each results sheet is renamed
with a descriptive title (e.g. ‘Disturbances’, etc.). The entire workbook should be
saved with a suitable filename for future reference (e.g. PCT40 Exercise M).
Each set of data should be plotted on a graph of temperature T1 against time.
Write up your experiment, commenting on the heating and cooling characteristics of
batch operation and the actions required for manual control of the process. Give
reasons for any time delay between applying a control action and observing a
response. Explain the difference in heating and cooling rates. Give examples of
industrial control situations in which a disturbance of the kind investigated might
occur.
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