Tuning a paper mill SCADA system using quality control data

Various paper qualities are automatically monitored on-line in a paper mill. These qualities are indirectly measured and used by the SCADA System to keep the product in trim. The same qualities are also directly manually measured from paper taken from the finished reels. This data is processed by the quality control section. Both the data from the computer and the quality control data are stored and comparisons made. Although vast amounts of automatically and manually collected data are continuously available it is difficult to confirm that the two sets of data are compatible. The doubt about the validity of the existing data and the proposal to increase the machine speed by one third caused the company to investigate the automatically collected data. This paper describes that investigation and the conclusions drawn