FAQS...(0's then) 1.000 on the display, the decimal point is always 3 digits from the right.
Measure the usage in 2 minutes, using the rightmost 3 digits. Remember it might go past zero. You'll have an answer like
0.XYZ cubic metres.
Multiply that figure by 321
That's how much you're using, in kW.
So if you've used
0.085 cubic metres in 2 minutes, that's 27.3 kW
This is all very educational, and highly interesting but how do you doitall when the appliance is still in the box
what?????