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The paper describes a photoelectric photometer especially designed for extended sources. Six bands selected by a concave grating spectrograph can be measured simultaneously. The sensitivity commutation of the electrometers is automatic and a 10' field can be observed during measurements.
Roughness is a fundamental requirement when it comes to galvanizing sheet metal for making
cars. Segal worked with Alstom and DMO to develop a measuring apparatus that makes it
possible to monitor the Ra roughness factor at every point and throughout the process.
The new system has been installed on the Segal galvanizing line. Two measuring heads
(WINDIS) with travelling system have been installed, one on each side, after the skin-pass
allowing a continuous measurement of the roughness. Alstom roughness control system is
composed of an Alstom HPC controller linked to Windis and PC computer. The roughness
measurement system has been in operation for a few months and the results show a very
satisfactory correlation of Windis measurements with the manual measurements carried
out in the laboratory.
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