In qualifying new electronic and mechanical systems through the HALT/HASS process, the products undergo testing by applying both thermal and random vibration to identify weaknesses in the design before they are finalized for commercial production. “Random” vibration in a HALT chamber covers a broad band, between 5-5000Hz and can also obtain measurements up to 10,000 Hz. The HALT process does NOT focus its energy in the low frequency range (1-800Hz).

The Qualmark Typhoon4 Inferno HALT Chamber is a robust testing apparatus used for:

  • Engineering qualification of electronic designs
  • Verifying designs for robustness and reliability
  • Screening products for production runs
  • Diagnosing assemblies with intermittent failures
  • Subjecting products to rapid thermal stresses while under vibration

1. HALT:

Classic HALT:

  • Cold Step Stress
  • Hot Step Stress
  • Rapid Thermal Cycling
  • Vibration Step Stress
  • Combined Environment (Thermal And Vibration)

Rapid HALT:

  • Retests a previously tested unit that has completed a classic HALT
  • Used as a screen for previously tested products to verify performance

2. HASS:

The Highly Accelerated 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.

3. 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.  Utilizing combined temperature and vibration cycling to identify any weaknesses, this process tests the specification of the system and pushes the unit beyond the upper and lower operating limits.

The Typhoon4 provides:

  • HALT Testing (Highly Accelerated Life Testing)
  • HASS Testing (Highly Accelerated Stress Screen)
  • Environment Stress Screening Testing


Qualmark Typhoon4 Inferno

-100°C to +250°C
70g(rms) vibration

Don’t see a test you require? DynaQual offers numerous other testing services not mentioned to meet test specifications. DynaQual Test Labs can add custom services for specific projects that are not shown here or will turn-key the added service with a partner lab to provide a seamless offering to our customers. Please use the inquiry form in the Contact Us tab to submit your request.