You raise a great point here, Patruns. Due to limited space we keep ours resting up against the bathroom wall, then put it on the floor to use it. At first we thought the fluctuations were due to uneven flex in the wooden floor, depending on where you sited the Aria. But now we've had the floor screeded and large heavy floor tiling put down so it's stable.
However, the weight variances kept happening. We thought maybe it was whether you had two of the resting pads on 1 tile and the back 2 on the next tile. So recently we've been siting the Aria in the center of just one, large floor tile.
Then we noticed that it always gave a lower weight after the Aria went through it's "Sensing" routing. Every weigh following this would usually result in a 2 - 2.3lb variance (but never a constant) - I'm also wondering what the sampling cycle rate is - which might account for .2 - .3lbs depending on where you apply pressure with you feet/balance/weight at any given second.
I'm going to leave the Aria out, on the floor, all day and see what it says tomorrow morning.
But i think you might be on to something here.
