In one embodiment, a system comprises a processor, a first interrupt controller coupled to the processor, and a second interrupt controller coupled to the processor. A threshold module sets a file size threshold. The conveying path for which it has been determined that the part related to the conveying path can be subjected to maintenance is displayed on a display device. The surfactant does not interfere with the polymerization and can be removed together with residual silicone oil by a simple washing procedure. The lead system is either a fiber optic system or an electrically shielded electrical lead system.