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HALT – Highly Accelerated Life Testing Services

The Qualmark Typhoon4 Inferno HALT Chamber is a robust testing apparatus. Some applications for utilizing this technology are:


  • • Engineering qualification of electronic designs
  • • Verify designs for robustness and reliability
  • • Screen products for production runs
  • • Diagnose assemblies with intermittent failures
  • • Subject products to rapid thermal stresses while under vibration.

The above tests utilize combined temperature and vibration cycling in order to identify if any weaknesses exist within the design or components themselves. This way of testing takes into consideration not only the specification of the system but also the ability to push the unit beyond the upper and lower operating limits.


Using the Typhoon4 Inferno at DynaQual Test Labs enables us to provide HALT (Highly Accelerated Life Testing), HASS (Highly Accelerated Stress Screen), and Environment Stress Screening test procedures. Discover more about HALT/HASS Theory HERE


I.            HALT:

a.       Classic HALT: consists of five key steps: Cold step stress, Hot step stress, Rapid thermal cycling, vibration step stress, and combined environment (thermal and vibration)


b.      Rapid HALT: used to retest a previously tested unit that has completed a classic HALT. Can also be used as a screen for previously tested products to verify performance.

II.            HASS: The accelerates stress screen applies a short period of combined thermal and vibration to production ready products to sift out abnormalities inherent in the manufacturing process. The goal is to not screen out more than 5% of the product life.


III.            ESS: Environmental Stress Screen uses the standard environmental conditions that the unit is expected to see during operation and discover how the unit will perform under those conditions for a short amount of time. ESS is a good gauge of product viability during normal field conditions.


Let us know if you don’t see the testing you need. DynaQual is planning to add complementary testing services such as Pressure, Calibration, X-ray, etc. We would like to hear from you regarding your interest obtaining these other testing services at our Houston location. Please use the inquiry form in the Contact Us tab to submit your request.