In a data log acquisition circuit 100, the number of executed test patterns counted by a number-of-patterns counter 1, or the address of the test pattern is compared with a predetermined reference value by an identity detection circuit 2. The mandrel has a metallic core and a jacket on an outer surface of the metallic core, and the wrapped sheet of polymeric material is heated without corroding the metallic core of the mandrel. A beam splitter is arranged in the radiation path, the beam splitter being used to inject visible light into the radiation path. Based on the tables, the store inputs may be validated.