Index to articles on this site about test

Is it just stress – or is it HARASSment?

This article was originally written in the period 1995-2000
Gabor Martell, Managing Director of Montford Instruments, explains the principle of HARASS testing of products incorporating electronics.

Thermal stress screening is an established way of exposing hidden faults which do not show up during normal testing. This happens because sub-standard components and connections often function correctly at first [...]

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Choosing an environmental test chamber

Original article date: June 1999
GEORGE COLEMAN managing director of Sharetree Systems explains the rules of engagement for selecting test chambers and overviews what’s on offer on the market.
Temperature test chambers are used for many different purposes ranging from fixed temperature testing of static products to fast thermal cycling of powered products that dissipate significant amounts [...]

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Highly Accelerated Life Testing

Original article date: June 1998
GEORGE COLEMAN of Sharetree Systems explains which criteria are important when evaluating highly accelerated life testing (HALT) techniques.
A highly accelerated life test (HALT) evaluation exercise should be applied to a new production before production release. The exercise will increase (or prove) the robustness of the product and establish the basis for [...]

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Three visions of the future

Original article date: April 1998
The increasing number of industrial applications for machine vision systems are making the technology an integrated part in many production environments. IAN PURCELL, Marketing Manager of Matsushita Automation Controls looks at the different hardware options.
The last ten years have seen a dramatic change in machine vision systems. Much of the development [...]

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Protecting your instruments with air

Original article date: October 1998
Vibration and shock can cause as many problems for sensitive instruments and other extreme environments such as heat and pressure. So it is often vital to invest in vibration control equipment.
Vibration even when undetectable to human senses can upset the accuracy of sensitive instruments. The more damaging vibration tends to be [...]

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Specifying weighing systems for hazardous areas

Original article date: February 1999
It’s a myth that electronic weighing systems are inappropriate for use in hazardous areas says CHARLES WARREN Industrial Product and Marketing Manager of Avery Berkel.
With increased concerns for the health and safety of personnel and plant more and more areas previously classified as “safe” are now being reclassified under European safety [...]

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Vibration screening of PCBs

This article was originally written in the period 1995-2000
A major in-service failure which necessitates the return of all systems for rectification is expensive and embarrassing. Vibration screening is one way to improve reliability.
On average, up to about 40% of all screenable defects are the rsult of other than component or device failures. The earlier a [...]

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