Standard Scope
Environmental testing procedures must evaluate the ability of electrotechnical equipment to withstand high temperatures during storage or operation. The international standard IEC 60068-2-2 defines the dry heat test methods applied to both heat-dissipating and non-heat-dissipating specimens. It establishes uniform testing conditions, durations and measurement procedures to verify the thermal stability of electronic components.
Test Procedure
Specimens are placed in a chamber maintained at a specified elevated temperature for a duration ranging from several hours to many days. Under the provisions of IEC 60068-2-2, the chamber air velocity must be controlled to prevent localized cooling or heating of the test piece. The test sequence includes pre-conditioning, initial measurements, exposure, recovery and final functional evaluations.
Accurate thermal mapping of the chamber interior is necessary to ensure uniform exposure across all test samples.
Physical Impact
High-temperature exposure accelerates chemical reactions, causing the degradation of plastic housings, insulating materials and sealing gaskets. By executing the tests specified in IEC 60068-2-2, designers identify potential failure modes such as thermal runaway or mechanical binding of moving parts. This allows for early corrective actions before the hardware is deployed in harsh industrial environments.
Compliance Documentation
A test report detailing the chamber temperature, exposure duration and functional status of the specimen is compiled upon test completion. Compliance with IEC 60068-2-2 is certified by verifying that the device maintains its specified performance parameters throughout the thermal stress cycle. This documentation is required for industrial sensor qualification and global market access.
