Five Factors Affecting Uv Testing Chamber

Uv  testing chamber is an aging test equipment that simulates light and is specially designed to simulate products placed outdoors for a long time. The damage caused by ultraviolet rays in the sun takes only a few days or weeks, and the uv aging chamber can reproduce the damage that takes months or years to produce outdoors. However, the test results of the uv weather test chamber are not necessarily accurate, and it is affected by many factors. So what factors will affect the test results of the UV aging test chamber? In response to this problem, the following Avery test equipment Xiaobian will give you a brief introduction

Environmental humidity effect

Under different environmental humidity standards, the photochemical degradation effects of various raw materials, building coatings, and plastics in UV aging test chambers are vastly different, and their regulations on environmental humidity standards are the same. Therefore, the actual environmental humidity standards are explicitly stipulated by relevant standards

Effect of air velocity

The airflow velocity close to the sample surface not only affects the temperature rise of the sample, but also causes significant errors in the open thermoelectric reactor monitoring the radiation intensity.  
In the natural environment, the probability of strong solar radiation and the special conditions of zero wind speed is very small, so when it is necessary to assess the impact of different wind speeds on equipment or components and other samples, specific requirements should be specified;

Surface contamination

Uv testing chamber surface environmental pollution dust and other surface air pollutants will be more serious, change the digestion and absorption characteristics of the surface of the illuminated object block. Unless otherwise required, the test should be cleaned, but in the identification of the efficacy of surface air pollutants, the relevant standards should require the test metal surface treatment and other essential content;

Ozone and other polluting gases

The ozone generated by the uv weather resistance test chamber under the short wave ultraviolet radiation of the light source can affect the degradation process of certain materials due to ozone and other polluting gases. Unless otherwise specified in relevant regulations, these harmful gas gases are discharged from the chamber. Therefore, it is also important to communicate with the equipment supplier about the characteristics of the product to be tested before purchasing the equipment.

Support frame and installation impact

The thermal characteristics and installation methods of various support frames will have a serious impact on the temperature composition of the experimental samples, and adequate consideration should be given to make its heat conduction characteristics typical of the specific application conditions. During the test, most of the test products are installed on a variety of rising support frames or gaskets that actually require thermal characteristics, and detailed provisions on the gaskets and installation methods and the placement of the test products should be the relevant requirements and standards.In general, the sample holder of the JOEO UV light test chamber is made of stainless steel, including the blackboard