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On Fri, Aug 22, 2008 at 1:42 PM, Simon Waters <simon@xxxxxxxxxxxxxx> wrote: > I need to measure power consumption. > > But aside from a very suspect reading from a UPS I don't think I have > the right tools. > > Anyone got a clamp-on Ammeter to loan in the Exeter area. > > I've not used one before but it looks like the tool I need. > > The simple sock watt meters fall down on the basis I'd have to unplug > stuff, and most of it doesn't have a regular household mains plug on > anyway...' Clip on meters only work if you can get ONE conductor through the clip on area, eg the current only flowing in one direction, if you clip on a standard mains cable etc you will measure nothing as the magnetic field is canceled out by the pair of cables. Basicly they work on transformer action. Robin -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html