Leading edge system for the evaluation of the paper quality and for the diagnosis of problems related to production :
The SIRPO^TM Test Bench (Système d’Inspection de Rouleaux de Papiers par Ordinateur meaning Computerized Paper Roll Inspection System).

"Scan" Mode : The scanning head scans the sheet every 20 seconds which allows to "map" the paper roll. This operation mode reveals both the cross-machine direction and the machine direction variations.

"Single Point" Mode : The scanning head remains stationary during the unwinding of the paper roll. This operation mode is particularly useful to check the machine direction variations.

The SIRPO^TM Test Bench sensors can measure seven paper properties:

• The Basis Weight
• The Moisture Content
• The Caliper
• The Opacity
• The Brightness
• The Formation
• The Ash Content

• Inspect and diagnose repetitive problems which occur at a specific position of the paper machine (Spectral Analysis with FFT Software.
• Check the mill system sensors by comparison with the measurements of the SIRPO^TM Test Bench.
• Measure a paper property which is not normally measured by the mill system sensors.
• Check the cross machine direction actuators by precis profile measurements in several positions.
• Validate the paper properties measured by the mill in the context of a total quality policy («Quality Audit»).
• Serve as a source of objective information to solve disputes between paper producers and users.
• Serve as a training support for the measurement, the calibration and interpretation of several factors influencing paper quality.