METHOD FOR CONTROL OF TEMPERATURE AND HUMIDITY IN TESTING CHAMBER AT WEATHERING TEST APPARATUS

摘要

PROBLEM TO BE SOLVED: To obtain a method in which more precise information on the life and other test items of a test sample can be obtained with better reproducibility by a method wherein the test sample is exposed precisely to specific conditions so as to be compared in various tests and weather conditions are set in advance precisely. ;SOLUTION: A heater 30 and a cooling-air entrance and ventilation port 48 which can be opened and chut by a control member 51 so as to be adjustable, which is provided with a damper 50 and which can be opened and shut so as to be adjustable are utilized, and a temperature in a testing chamber 14 is controlled. The degree of humidity which is given by spraying devices 52, 53 to the air circulating in the chamber 14 can be controlled. A humidity sensor 43 communicates with a microprocessor 38. All operations are controlled automatically, an undesirable change in conditions due to a feedback problem is not generated, the accuracy of the measured value of data is enhanced, and an effect to precisely set desired temperature and humidity conditions is realized. Weather conditions can be reproduced precisely in every test, and results which are obtained in different tests and in different points can be compared easily.;COPYRIGHT: (C)1996,JPO