A method for inoculating molten iron. MFDAT replaces ordinary test instruments such as spectrum analyzers, oscilloscopes, power meters, frequency counters and digital multimeters with modular virtual test instruments that perform the identical functions but use a single display and human interface. To reduce cost and preserve electrical and networking performance, an integrated switch is provided to multiplex signals of a networking communication chip to multiple network paths. For each salesperson, on-line communication channels are monitored for the occurrence of a communications involving a customer associated with the salesperson and including a target item defined by the salesperson. The arched structure provides attachment locations for one or more accessories, such as mosquito netting, tents, tables, drink holders, lights, and other accessories. The chamber includes multiple apertures which allow fresh air to pass to the wearer after it is mixed with warm, humid, exhaled air.