This module, one of 25 on vocational education training for careers in environmental health occupations, contains self-instructional materials on operating a microwave radiation detection monitor. Following guidelines for students and instructors and an introduction that explains what the student will learn are three lessons: (1) testing the operation of a low-power density-sensitive microwave radiation monitor; (2) conducting a functional test of a commercially available microwave oven; and (3) conducting a microwave oven leak test survey using a low-power density-sensitive microwave radiation detection monitor. Each lesson contains objectives, recommended methods and locations for practice, performance criteria, equipment and supplies to perform a task, detailed step-by-step instructions for learning a task, and performance exercises. Four performance tests cover preparing the microwave radiation monitor for use; checking the operating condition of a microwave oven; leak-testing a microwave oven; and collecting and recording microwave oven survey data. (CT)