HALT/HASS Testing

Capabilities of the Current Equipment we have in the lab: 

HALT Chambers Model QRS-600

 

    • Supports vibration and thermal HALT testing
    • Enables HASS testing in production line environments
    • Handles loads of up to 272 kg

 

Structural Features:

    • Removable table with dimensions 112 cm x 112 cm for maximum convenience.
    • Rear sliding door for easy access to the tested equipment.

 
 
 

Advanced Temperature Control System:

    • Rapid heat delivery system providing fast and uniform heating.
    • Automatically adjustable ceiling for complete adaptability to various product testing needs.

This equipment facilitates precise reliability and robustness testing while supporting heavy loads, making it especially suited for dynamic and advanced production environments.

HALT (Highly Accelerated Life Testing) and HASS (Highly Accelerated Stress Screening) are engineering and manufacturing processes used to test the robustness and reliability of products. They help identify design weaknesses and manufacturing flaws by subjecting products to extreme conditions.

 

HALT (Highly Accelerated Life Testing)

  • Purpose: Focuses on improving the product design by finding weaknesses in a controlled environment.
  • When Used: During the design and development phase.
  • Process:
    1. Apply extreme environmental conditions (e.g., temperature, vibration, humidity).
    2. Gradually increase stress levels to determine failure thresholds.
    3. Identify and address weak points in the design.
  • Key Stresses:
    • Temperature Cycling: Rapid changes between high and low temperatures.
    • Vibration Testing: Multidirectional random vibrations.
    • Combined Stresses: Simultaneously applying multiple stress types.
  • Outcome: A more robust design that can withstand harsher environments and prolonged use.

HASS (Highly Accelerated Stress Screening):

  • Purpose: Screens out manufacturing defects to ensure product consistency and reliability.
  • When Used: During production, after the design phase.
  • Process:
    1. Use stress conditions established during HALT (but at lower levels to avoid damage).
    2. Test a batch of products to ensure they meet quality standards.
    3. Identify and remove defective units.
  • Key Characteristics:
    • Prevents early-life failures in the field.
    • Ensures manufacturing processes remain consistent over time.
  • Outcome: High-quality products that meet customer reliability expectations.

 

Differences Between HALT and HASS

Aspect HALT HASS
Objective Improve product design Detect manufacturing defects
When Applied During development During production
Stress Levels Very high, beyond normal operating range Lower, within safe limits for the product
Output Improved design with identified thresholds Reliable and consistent manufacturing

 

Benefits of HALT and HASS

  1. Reduced Warranty Costs: By minimizing product failures.
  2. Improved Customer Satisfaction: Through reliable, robust products.
  3. Faster Time to Market: By addressing design issues early.
  4. Cost Efficiency: By identifying and resolving issues before mass production.

 

Challenges

  • Specialized Equipment: HALT and HASS require advanced testing equipment.
  • High Initial Costs: Can be expensive to set up.
  • Skilled Personnel: Requires trained engineers to interpret results and make design changes.

 

If you’re considering implementing HALT or HASS testing, it’s important to weigh the initial investment against the long-term benefits in product reliability and customer satisfaction.

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