GB/T 2423.3-2006, titled "Electrical and Electronic Products - Environmental Testing - Part 2: Test Methods - Test Ca: Constant Temperature and Damp Test," outlines the procedures for testing electronic components under controlled environmental conditions. According to the standard, test samples must be placed under either standard atmospheric conditions (as specified in section 5.3 of GB/T 2421-1999) or specific conditions (as described in section 5.4.1 of the same standard). If a sample requires recovery under particular conditions, it should either be moved to another test chamber or left in the original constant temperature and humidity chamber.
If the sample is to be transferred to another chamber, the transfer time should be minimized to ensure minimal exposure to external conditions. However, if the sample remains in the original chamber, the relative humidity must be reduced to between 73% and 77% within 0.5 hours. Following this, the temperature should be adjusted to the test chamber's set point within another 0.5 hours, with a temperature tolerance of ±1K.
It’s important to note that the recovery time should begin once the required recovery conditions are met. This ensures consistency and accuracy in the testing process. Proper handling during recovery is essential to maintain the integrity of the test results and avoid any unintended effects on the sample's performance.
The method described here is based on national standards for constant temperature and humidity testing chambers, ensuring that all samples are tested under controlled and repeatable conditions. Understanding and following these procedures is crucial for laboratories conducting environmental testing on electrical and electronic products.
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