Abstract: A method and a system have been described to determine a pressure relief set point for a person-support apparatus. The method includes determining the change in pressure or volume in a zone from a vacant mode to a person occupied mode and computing the weight supported there from.

Abstract: A microwave oven cooking time scale for predetermining cooking time for a known amount of food to reach a predetermined temperature for a predetermined heating efficiency of the food in a microwave oven. The microwave oven cooking time scale includes a balance beam scale with food positioned at a fixed point on one side of the balance beam and a counterweight adjustable along the length of a cylindrical information chart rotatably engaged on the balance beam. The counterweight includes a pointer which indicates on the rotatable cylindrical informational chart the proper cooking time to reach a predetermined particular temperature. The cylindrical information chart is divided as a function of time and temperature on an x-y axis and can be subdivided as a function of cooking efficiency, cooking power, and cooking moisture on the y axis. The cylindrical information cylinder is replaceable for different models or manufacturers of microwave ovens.