[. . . ] Keep these instructions for future reference. 15. The mains plug or an appliance coupler is used as the disconnect device, the disconnect device shall remain readily operable. [. . . ] Do not defeat the safety purpose of the polarized or grounding-type plug. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. Protect the power cord from being walked on or pinched particularly at plug, convenience receptacles, and the point where they exit from the apparatus. Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/ apparatus combination to avoid injury from tip-over. Unplug this apparatus during lighting storms or when unused for long periods of time. [. . . ] CAUTION: Use of controls or adjustments or performance of procedures other than those specified may result in hazardous radiation exposure. [. . . ]