There are a number of recordings in the DCS-system for chemical, steam and dilution
dosages which are based on on-line measurements such as flow amount, consistency,
pH, temperature and levels of tanks and towers. If the on-line measurement differs
from actual situation, a dosage is going to be wrong or automation or monitoring
control is not working in the way that it should be.
With the help of laboratory analyses this kind of faulty action can be prevented and
analysis and measurement equipment can be calibrated to the right area or the DCS
system can be given a so called “adjustment factor”.
Comprehension and frequency of sampling and number of analyses depends upon the
number of operating and laboratory personnel and the department in question.
The analysis and sampling program for the DPA press should include: