1. Standard GB11158-89 high temperature test chamber Technical conditions: GB11158-89 "Technical Conditions for High Temperature Test Chamber" formulated by the National Standard of the People's Republic of China. This standard was approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on March 10, 1989. Formally implemented on May 1, 1990, we first understand the subject matter and scope of use of the standard. The standards cited in this standard are as follows: GB 1497 basic standard for low-voltage electrical appliances; GB 4857.7 transport package test method; GB 2424.1 Basic environmental test procedures for electric and electronic products, high temperature and low temperature test guides; GB 191 packaging storage and transportation icon; ZB N31 012 climatic environment test equipment and test box noise sound power level determination; 2. Wind speed test method for the test method specified by the high temperature test chamber standard: This test is carried out under no-load and room temperature conditions: a. Hang the fine cotton yarn or other lightly floating objects at the test point position, open the fan after closing the door, and find the leading wind direction of the test point; b. Place the anemometer probe at the test point, and after closing the box door, measure the maximum wind speed value of the dominant wind direction of each test point; c. Trial calculation and evaluation method of test results: 1. Correct the measured wind speed value according to the correction value of the anemometer; 2. Calculate the average value of wind speed at all test points. 3. The test of the temperature difference between the working chamber wall and the working space is as follows: The test method for the temperature difference between the working chamber wall and the working chamber of the test box is as follows: a, high temperature test chamber This test is carried out under no-load conditions; b. Placement and quantity of test points: a. Place a temperature sensor in the geometric center of the workspace, denoted by o; place one surface humidity sensor in the geometric center of the inner wall of the six sides of the studio, with A, B, C, D, E and F are indicated. b. If there is a lead hole or other device in the center of the working chamber wall, the distance between the test point and the hole wall or other device should be less than 100mm. Test procedure: a. Within the adjustable range of the test chamber temperature, select the highest nominal temperature for the test. Temperature; b. After the temperature of the geometric center point of the workspace reaches the test temperature for the first time and stabilizes for 2 hours, the temperature values ​​of all the test points are tested once every 2 minutes for 5 times.
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