Instrumentation Provides Novel Process Control and Cost Saving Benefits, PaperCon 2016 

At PaperCon 2015 studies were introduced that showed numerous process control benefits that can be realized on tissue machines equipped with the EasyScan traversing permeability, water content, and temperature measurement capabilities.  These scanners provide detailed data analysis including 3D mapping of the press felts in several modes, and Fast Fourier Transformation (FFT) analysis of the incoming data to show pulsation and vibration issues before they become problematic on the felts, and provide a powerful tool to the maintenance group to identify specific rotational frequencies that can allow for predictive maintenance, rather than “run to failure” mode. 

These traversing instruments can now be supplemented with lower cost, fixed point measurement heads, the PressScan units, which only measure moisture content.  These instruments contain planar microwave sensors which are capable of measuring felt and sheet moisture before the pressure roll, and/or only felt moisture content before and after conditioning equipment. This paper also contains a brief explanation of how microwave measurement works and contrasts it to earlier gamma radiation measurement.

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