HALT Chambers Specialized test chambers are needed to perform a HALT. Typical HALT chambers are shown in Figure 1. The specification for HALT chambers is typically the following: Liquid nitrogen (LN2) is used to cool the air temperature in HALT chambers. This allows for very rapid temperature changes of 60°C per minute and a cold …
HALT procedures vary from lab to lab but are typically performed similar to DES’s procedure which is summarized below. DES’s HALT procedure is divided into 5 Stages: Stage 1 – Temperature Step Stresses, Stage 2 – Temperature Ramps, Stage 3 – Vibration Step Stresses, Stage 4 – Combined Temperature &Vibration Stresses, and Stage 5 – …
Highly Accelerated Life Testing (HALT) is a rigorous reliability test method that is used to expose product weaknesses. The goal of HALT is to proactively find weaknesses and fix them, thereby increasing product reliability. Because of its accelerated nature, HALT is typically faster and less expensive than traditional testing techniques. HALT can be effectively used …
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Delserro Engineering Solutions (DES) was honored to be featured in a recent article discussing the capabilities of engineering testing companies. The article highlighted the benefits, in terms of both design and cost, of adequately testing designs, preferably as early in the process as possible. It also discussed the ins and outs of partnering effectively with …
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Highly Accelerated Life Testing Procedures Speeding up the process of device or circuit failure requires extreme inputs, those that are unlikely to occur during real-world use by customers regardless of the environment. Three common testing inputs are high and low temperatures, rapid cycling of the same and vibration along six-axes. In some cases, a highly …
We had many interesting test projects at Delserro Engineering Solutions this past month: We completed a Pyroshock test on our Mechanical Impact Pyroshock Simulator (MIPS) on equipment that will fly into outer space. On the other end of the altitude spectrum, we completed environmental testing of components that will be used in submarines to MIL-E-917. …
Product reliability is essential to success in today’s competitive global market. HALT and HASS are intensive methods used to expose and then improve design and process weaknesses. HALT and HASS are faster, less expensive and more accurate than traditional testing techniques. HALT and HASS are proven processes used to lower product development and manufacturing costs, …
This article discusses the reliability challenges of switching over to lead-free solder and the test methods used to demonstrate reliability, written by Gary Delserro and published in Evaluation Engineering Magazine. Click on the link to download the article in PDF, Lead Free Solder Reliability Issues & Test Methods. Environmentally friendly is a term rapidly invading the …
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This article discusses an abbreviated technique that uses the tools of HALT to expose hard-to-find defects in products returned by customers, written by Gary Delserro and published in Evaluation Engineering Magazine. Click on the link to view the article in PDF, Exposing Hard to Find Defects. How many times have your customers returned products or circuit boards …