Proper operation of a constant temperature and humidity test chamber is essential to ensure accurate testing results and extend the equipment's lifespan. Each test chamber has its own scientific procedures, and following them correctly not only helps in maintaining the device but also ensures reliable and precise data collection. After purchasing such equipment, it is crucial for users to thoroughly study the operation manual and understand the device’s performance to maximize efficiency and effectiveness.
To ensure the long-term normal operation of environmental test equipment and prolong its service life, proper usage and correct operation are vital. When used appropriately, the constant temperature and humidity chamber can deliver accurate test results, reflecting the true scientific standards of the testing process. With years of R&D and production experience, Zhongbao has accumulated extensive knowledge on the correct and scientific use of these chambers. In this article, we will share practical tips on how to properly operate a constant temperature and humidity test chamber and improve overall testing quality.
First, when conducting environmental tests, it is important to fully understand the sample’s properties, test conditions, procedures, and techniques. Familiarize yourself with the technical specifications of the equipment being used, and have a basic understanding of its structure—especially the controller. Always read the operating manual carefully to avoid mistakes that could damage the samples or lead to inaccurate test data.
Second, choose the right test equipment based on the sample’s requirements. Ensure that the volume of the test sample fits within the effective capacity of the chamber. For heat-generating samples, the volume should not exceed 10% of the chamber’s effective space. For non-heat-generating samples, the limit is 20%. This helps maintain stable environmental conditions during testing.
Third, if the test requires adding a medium, such as water in a humidity chamber, make sure to follow the guidelines precisely. For example, in damp heat testing, the water’s resistivity must be controlled. A cost-effective and convenient option is purified water, which offers similar electrical resistivity to distilled water.
Fourth, when using a wet heat test chamber, special attention must be given to the wet bulb gauze. Not all gauze can be used; it must be specifically designed for this purpose. The gauze affects the accuracy of humidity readings, as it influences the evaporation rate and moisture absorption. The gauze should be 100mm long, tightly wrapped around the sensor, positioned 25–30mm away from the humidity cup, and fully immersed in the water reservoir to ensure accurate control and measurement.
The constant temperature and humidity test chamber consists of several key components: the chamber body, air circulation system, refrigeration system, heating system, and humidity control system. The air circulation system typically allows for adjustable airflow direction. Humidification can be achieved through boiler-based or surface evaporation methods. Cooling and dehumidification usually rely on an air conditioning-style refrigeration system, while heating is often done via electric heating elements or direct electric furnaces. Humidity can be measured using either the dry and wet bulb method or a direct humidity sensor. The control interface may offer separate or combined temperature and humidity controls.
HUMGINE products include: constant temperature and humidity test chamber, high-low temperature test machine, clean oven, blast drying oven, constant temperature drying oven, moisture-proof cabinet, nitrogen oven, high-low temperature box, incubator.
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