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Test & Measurement


already confidence that the product is sufficiently robust, storage and operational tests may be combined as a sequence, offering a reduction in time over the tests performed individually is a practical solution.


National differences Often, manufacturers test their products repeatedly to similar but slightly different standards in order to meet country specific requirements. The CB Scheme is the world's first international system for the mutual acceptance of test reports and certificates for electrical and electronic components, equipment and products. It does not completely eliminate the need for additional “in-country” approval or testing but does get you 85 per cent of the way there. The multilateral agreement reduces significantly the need for duplicate testing, is operational in over 50 countries, and is being used by more than 15,000 manufacturers worldwide. Many countries will now accept CB Test reports and certificates without the need for local certification. The ability to carry out one test programme to in effect gain many national marks, faster and at a lower cost surely means that more should be taking advantage of it.


Advising customers Frequently, we find that a customer’s original requirements are flawed because of:


• Poorly understood environment – while the customer is aware of the intended environment, they do not necessarily capture all of the environments


for every possible use, often concentrating on operational environments and neglecting transportation. • Poorly defined test requirements – the test standards and methods that are defined by the customer show a misunderstanding and tests are incorrectly specified.


• Exaggerated test parameters – there is always a temptation to be ‘safe’ with test parameters, involving rounding up and adding safety margins. Be sure that this has only happened once, not once for each person involved!


When a customer demands that certain


tests are done, it is therefore advantageous to reassess if they are required, or determine if they can be reduced. Most importantly, first check that the standards relating to the product have been interpreted correctly. Also, carry out some research in order to assess what testing has already been performed, and look for similarities with other products. If you do have to test you can also save time and money by looking at how you might combine tests and reduce test durations where possible.


By making an investment in time and thought at the outset of a testing programme, and considering some of the advice outlined above, you could find that you will make significant long-term costs savings, as well as release products onto the market quicker to stay one step ahead of the competition.


TÜV SÜD Product Service | www.tuvps.co.uk


Jean-Louis Evan is Managing Director at TÜV SÜD Product Service


www.cieonline.co.uk


Components in Electronics


April 2012 13


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