In anticipation of installing a Solar Array at home (someday), I’m going to need to monitor my power usage more accurately. I’ve created a worksheet to approximate my power usage, but I need more solid data. So, I’m going to need to read data directly from the Itron Centron CL200 meter. It uses ANSI C12.19 and C12.22 standards for transmitting data, so I should be able to tap into it after I familiarize myself with the specs. The CL200 also transmits watt-hour usage via infrared pulses on the top of the meter. It seems that the meter transmits 1 pulse for every watt hour of usage, so in the near-term I’m going to have to build a circuit to read this data. Once I’m able to read the data, I can begin analyzing it and I’ll post it (along with graphs) on this site.
Fortunately, there’s already an existing open-source project dedicated to Automated Meter Reading(AMR): OpenAMR
Another blogger is also working on a similar project. His page can be found here: http://davestech.blogspot.com/2008/02/itron-remote-read-electric-meter.html