Environmental testing in a high-power constant temperature and humidity chamber.

Our company conducts environmental testing using a constant temperature and humidity chamber with a front glass window and a camera, capturing and monitoring the operational status such as screen displays. During environmental testing using equipment like constant temperature and humidity chambers, monitoring the condition of the test subjects using loggers for parameters like voltage, current, resistance, and temperature is widely practiced. However, monitoring the operational status of equipment during testing can be difficult unless the test equipment is equipped with dedicated external outputs. For samples where monitoring with loggers is challenging, we combine a constant temperature and humidity chamber equipped with a front glass window option, a camera, and monitoring software to conduct environmental testing while capturing and monitoring the condition of the test equipment.

We would like to introduce the results of our investigation into the behavior of strain during moisture absorption and drying using a strain gauge. It was observed that the material expands when it absorbs moisture due to humidification, contracts when it dries due to dehumidification, and the strain returns to the state it was in before humidification. Regarding FR-1, it is presumed that the material did not return to its original state due to changes in its chemical structure caused by hydrolysis.