Method for recording temperature profiles in food packages during microwave heating using a metallic data logger

摘要

The time/temperature history of a food tray or pouch heated by microwave energy applied through a waveguide can be accurately assessed on positioning and stabilizing a shielded data logger in an orientation where the base of the data logger is located generally close to zero depth (near the side wall) and the tip projects to the cold spot in the tray or pouch. A frame can be used to assure stability of orientation in a pouch while bracing can be used to assure stability in a tray. The properly configured food tray or pouch can serve as an accurate witness device for food items being processed in a similar manner under microwave heating for, e.g., sterilization or pasteurization.

主权项

1. A method of microwave heating of food products, comprising the steps of:
positioning a data logger in a position within or projecting in a food tray or pouch with a base of said data logger oriented adjacent one side of said food tray or pouch and a temperature sensor connected to said data logger projecting from said base of said data logger to a cold spot within said food tray or pouch; securing said data logger in said position within or projecting in said food tray or pouch; exposing said food tray or pouch to microwave energy with said one side of said tray or pouch oriented close to a sidewall of a microwave wave guide and said temperature sensor projecting a selected depth within said microwave wave guide from said sidewall; and determining a time and temperature profile for food or model food within said food tray or pouch from said data logger.