Just bought a cheap n nasty DMM today while looking through my local maplins store, and must say quite impressed for £29.99
Its a basic meter but has an RS232 interface so you can hook it up to your PC.
heres a graph of voltage supplying my house for just under 3 hours 6:20PM to 9:15 (ish)
i was running around the house turning on and off shower/cooker/ oven etc
The graph shown was done on Excel, but the software that comes with the meter shows a scrolling graph and the cool thing is that i can tell when the kettle has boiled
, using another PC to view the data.
Am now doing a 24 hour graph, so will post back tomorrow night if the PC does`nt crash.
[This message has been edited by sanUK (edited 04-11-2004).]