Fellow EMCers, 61000-4-6 says that the EUT must be 10cm above the GRP. There is no tolerance. However, anyone that has worked in a machine shop or in metrology knows that there is no such thing as "no tolerance". What would be considered an acceptable tolerance for the 10cm requirement? If an auditor says that the support for the EUT has to be exactly 10cm, "no tolerance", how can one argue with them that 1mm is not going to affect the test? The EFT standard, 61000-4-4, says 10cm +/- 1cm. Could this be used as a basis for an argument? Bob Richards, NCT -
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