GB/T 18310.19-2002 Constant humidity cabinet test for focusing fiber interconnect devices and passive devices. The standard specifies the test equipment, if the temperature and Humidity can be precisely controlled, the test chamber requirements. Detailed instructions for placing the device in a specific constant temperature Humidity environment, specifying the temperature, Humidity value and test time. Stability in heat and humidity environments is evaluated by observing the performance changes of the device before and after the test, including Optical Properties, Mechanical Properties, etc. This standard provides specifications for mass inspection of such devices, helping to ensure their Reliability and Optical inspection Stability in heat and humidity working environments.