A casting system for pouring nonferrous metal molten masses, in particular copper or copper alloys, has a tundish and a submerged pipe feeding into a molten bath inside a thin-slab mold. A photographic image captured with a camera incorporated upon the wireless handheld communication device is wirelessly transmitted to a proprietor’s server. The cable terminal is electrically connected to a ground potential and includes a field control element and isolations at inhomogeneous potential transitions on the cable end. The management system analyzes the received inspection data for computing the number of defective traps, the ratio of defective traps to the entire traps, the loss caused by steam leakage, etc. The first comparator further receives a {fraction } VBG voltage, and the second comparator further receives 2VBG voltage. The method includes the steps of introducing a slurry of phosphor powder and a binding resin dispersed in a medium into the tubular vessel, holding the tubular vessel sideways to deposit the phosphor powder and the binding resin in the tubular vessel, and removing the medium from the tubular vessel, thereby forming a phosphor layer on one side of the internal surface of the tubular vessel.