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Re: [LUG] Clamp-on Ammeter ?

 

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

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