A group of Dutch scientists have been testing out some of today’s “smart” electrical meters to check their accuracy, among other things. Not ones to disappoint, the scientists have found consistently With experiments lasting for six months, the researchers tried to focus on meters representative of those commonly used in the Netherlands and manufactured between 2004 and 2014.

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Moreover, the researchers tried to reproduce standard household energy consumption patters rather than focusing on stress tests. Their results? Well, “results varied wildly, with some meters reporting errors way above their disclosed range, going from -32% to +582%.

Tests with uncommon results were repeated several times and the results were within a few percents of the original. Sccm 2012 R2 Software Center Ing 0 Complete. ” Moreover, “The greatest inaccuracies were seen when researchers combined dimmers with energy saving light bulbs and LED bulbs.” Not constrained to energy saving light bulbs, the inaccuracies are, ironically, tied to devices with integrated energy saving features. (Certainly makes us want to keep a ) “The reason for faulty readings appears to be the current sensor, and the associated circuitry,” said researchers. “The experimental results [] show that static energy meters can be pushed into faulty reading (positive and negative) if sufficiently fast pulsed currents are drawn by the consumer” It is worth noting that there is contradictory research published by “the European voice of the providers of smart energy solutions” that maintains that “there is no reason to question smart metering technology”. Still, we wouldn’t blame you if you.

Thanks [acs] for sending this in! Posted in, Post navigation. One of the problems with current sensors used in meters is that they are cheap and doesn’t have the frequency response to handle some high-frequency loads. The frequency response on CT sensors are usually less than the 8th harmonic (.

So if a current transformer is no good, would the old fashioned method be better? IE an inline resistor? When I say resistor I suppose I mean a couple of feet of thick copper cable, something in milli-ohms or the like. Then measure the voltage across, using a sensitive amplifier.

While there are lots of very fast switch-mode PSUs around now, they’re usually pretty low power. Gigabyte Motherboard Drivers G41mt-s2p. Phone chargers and the like. I suppose consoles and computers use them, TVs too. Actually they’re probably more common than I thought.

Not sure anything uses old-fashioned heavy iron transformers any more. Still, surely most power consumption is from things using raw mains, big motors and heaters?

Little DC electronic doodads must only be sucking a few dozen watts in an average house. As far as spikes too fast for the meter to notice, would putting a capacitor across the mains help? Manual For Teac Ag 790e Dec. To effectively short or buffer any quick spikes. Small enough that it doesn’t carry significant current at 50 / 60Hz. Maybe I know of a friend’s, cousin’s, boyfriend’s, aunt, who observed a greater than expected drop in consumed power when 2 Walmart Great Value brand A19 60W replacement LED bulbs were put in a fitting dimmed with a standard old rotary dimmer. Or maybe I don’t, or maybe that’s not the reason it happened, or maybe I dreamed it. After all, the relevant “authorities” claim it’s impossible right?

Also if you don’t want to be accused of any nefarious activity, make sure you don’t read up on Power Factor Correction as a possible mechanism as to why this happens, and the best way to take advantage of it, even through the free proxy on hidemyass.com in case your searches are logged. I would also not recommend that you build a table lamp with such a dimmer in, and try it around the house, in case the distance to the meter makes any difference, or it’s most effective on the socket with the shortest path to it. I would also not recommend reading this post, or having done so inadvertently, recommend that eye-bleach or the nearest flashy thing be used ASAP. This concludes our comedy science fiction interlude for this evening and we return you to your regularly scheduled commenting.;-). I had to do this at one point. They talked so much bs and diverted so much not even the legal help knew what to do to stop the debt collectors banging my door and posting me a letter that cost $300 every day.