Chinese Academy of Science

Cooling is a critical aspect of constant temperature and humidity test chambers. The two most common cooling methods are water-cooled (chilled water) and air-cooled. Each has its own advantages and disadvantages.

UV weathering test chambers are typically equipped with either UVA-340 or UVB-313 cold-cathode fluorescent UV lamps. The spectral differences between the two types directly influence the acceleration factor and the reliability of test results.

A salt spray test chamber is an accelerated corrosion environmental testing device. The primary causes of metal corrosion include oxygen, salt particles, pollutants in the air, as well as changes in temperature and humidity.

This guide regulates the daily start-up/shut-down, parameter setting, sample loading, process monitoring and maintenance of laboratory constant-temperature and humidity test chambers (hereafter “the chamber”), ensuring personnel safety, equipment reliability and data traceability.

The humidification process in a constant temperature and humidity test chamber essentially involves increasing the water vapor partial pressure. The initial humidification method was to spray water onto the chamber walls and control the water temperature to regulate the saturation pressure of the water surface.