Uncommon and unexpected metering errors

In today's electrical environments, where power quality has become a major issue, it is often said that measuring and monitoring becomes increasingly important. While this is certainly true, it also brings about plenty of opportunities to receive wrong or irrelevant results and to miss the relevant ones on account of using inadequate equipment, of insufficient knowledge about the working principles of the equipment one is using, of metering at the wrong place or time or of misinterpreting the results obtained. The presentation highlights a number of examples for these issues and gives recommendations how not to get trapped in these partly typical, partly unusual pitfalls.