Burn
Units are run at high ambient temperature  (50ْ C) while being power cycled for a period of from 8 to 96 hours. All outputs of the units are monitored during this test and the time to failure is recorded in the quality database for each unit by serial number.  Other levels of burn include Environmental Stress Screening (ESS) and Highly Accelerated Stress Screening (HASS).  ESS is a thermal stress, of ~1 degree C/minute while the unit if operational and being monitored.  HASS is a combination of thermal and vibration, of ~ 1 degree C/Second and a vibration of 50G’s max while the unit if operational and being monitored. (OVS-3 HALT/HASS Chamber, pictured right)

Final test
Final test is designed to detect any changes to units during burnin. It is a complete Hi Potential safety test and full load functional test. These test are done by program controlled automated test equipment which records all test results in the quality database by serial number for each unit tested.  A quality inspection of each unit is performed after test to assure all test and quality checks have been performed and that unit appearance and labeling is correct. (Burn-in rooms, pictured left)