Both spring and fall are challenging times of year for quality test engineers.
In plants that aren’t temperature controlled, the combination of warmer days but still cold nights means trouble with their leak testers. The interiors of cold parts may not warm up as fast as the air in the plant. This may lead leak test equipment to report a lower, and misleading, leak rate throughout the day. The parts in question may roll off the production line without meeting the end customer’s specifications.