We need to know the three major knowledge of the ozone aging test machine: the first point explains the test principle of the ozone aging test chamber; the second point focuses on the adjustment of the ozone concentration; the third point explains the environmental requirements of the test box. Let's take a look at the Shanghai Bao test together in detail: 1. Test principle of ozone aging test chamber The vulcanized rubber or thermoplastic rubber sample was exposed to a static test chamber under static tensile strain conditions in a closed test chamber containing air and constant humidity at a constant ozone concentration, and the crack of the sample was examined for a predetermined period of time. The evaluation of ozone cracking at selected ozone concentrations and test temperature conditions may be as follows: a) After the specified test time, check the sample for cracks, and if necessary, evaluate the crack degree of the sample; b) measuring the earliest cracking time of the sample under any specified tensile strain; c) Determine the critical strain for any specified exposure time. 2. Adjustment of ozone concentration in ozone aging test chamber When an ultraviolet lamp is used, the ozone concentration can be controlled by adjusting the voltage applied to the lamp, the gas flow rate, or the method of covering part of the lamp. When a silent discharge tube is used, the ozone concentration can be controlled by adjusting the voltage applied to the generator, the electrode size, the oxygen flow rate, or the air flow rate. These adjustment methods should keep the ozone concentration within the tolerance of the specified concentration. In addition, after opening the test chamber to place or inspect the sample, the ozone concentration should be restored to the concentration specified in the test within 30 minutes. The ozone in the test chamber must not exceed the concentration specified in the test under any circumstances. 3. Environmental requirements for ozone aging test chamber The test chamber should be sealed and unlit, and the test temperature difference can be constantly controlled at ±2 °C. The inner wall of the test chamber, the conduit and the frame should be made of materials that are not easily decomposed by ozone (such as aluminum). The test chamber can be set to observe the surface change of the sample, and the light source can be installed to facilitate the inspection of the sample, but it should be kept dull during the test. The above is a detailed discussion of the working principle of the ozone test chamber. Three points explain the external conditions of the test chamber and the internal factors. I hope that you can help you after reading this article. Top-grade NMN Raw Material Powder,NMN Raw Material Powder for Longevity,Reliable NMN Raw Material Shanghai Canal International Trade Co.,Ltd , https://www.nmncanal.com