I hope somebody can help me, I am a bit lost.
I want to measure apparent power at home. Most of my loads are resistive, and I can live with a 10% error on the measurement.
I have a 220V phase to phase voltage, and a 3-phase input without neutral.
My setup that is currently installed is:
- 1 Raspberry Pi, with a RFM69Pi, and the last emonSD downloaded from the site.
- 1 emonTx v3, with 3 CT sensors connected to the three phases, and 1 AC-AC connected to 2 phases for voltage input.
All is configured as stock, the emonCMS is receiving data from the emonTx, but of course the data I am receiving has nothing to do with the real power. Even the Vrms data is around 110v, not 220v.
So, what should be my next steps? How can I calibrate and measure 3-phase apparent power?
I would love to avoid changing emonTx firmware, as I don’t have the USB cable for that, and I would have to wait for it.
Can I do the maths on emonCMS? If I can, where and how should I do that?
I really tried looking on the site and the forum, but I can´t find anything that helps me with this task.
Consider that I am really new on this.
Thanks a lot for your help!