HI, I have followed this guide here and when a tried it on a 60W fan, the below were the outputs.
0.93 149.60 133.40 1.12 0.01
57.42 194.36 132.37 1.47 0.30
88.40 178.11 134.13 1.33 0.50
-1.73 173.63 133.41 1.30 -0.01
0.10 148.97 133.70 1.11 0.00
97.11 191.04 134.33 1.42 0.51
0.44 175.21 133.81 1.31 0.00
105.34 198.26 133.87 1.48 0.53
What could the problem be or is this normal ?
The sketch is the same as in the guide.
Re: Arduino Energy monitor outputs
Have a look here.
Re: Arduino Energy monitor outputs
The three middle values, for apparent power, rms voltage and rms current, seem to be reasonably consistent. But the first and last values, for real power and power factor, are very variable.
It may be helpful to repeat the test when using a resistive load. Any filament bulb should do; in the UK they are generally labelled as "dimmable". A resistive heater of at least 1 kW would be better because this will use more of the ADCs input range.
Re: Arduino Energy monitor outputs
RAE has just reminded me that there's an old thread on here with the title:
"EmonLib Problem on energy monitor
Submitted by drinu16 on Thu, 21/08/2014 - 18:36"
Have you forgotten that, Darren? You've still got the same problem a year later.
Re: Arduino Energy monitor outputs
Ahh, yes I totally forgot about that :) (thanks for reminding me) and I also forgot what results I had obtained a year ago.
I made a small pcb with the components of the voltage and current input, need to test it with higher current.