In 2005 I bought an appliance which can be plugged in the outlet to measure the energy consumption of any device which you connect there. I wrote an article about how to measure power consumption (languages: es, eo) which presents some of the results.
This power meter was surprisingly difficult to find in shops, so I tried to collect all information I have about it. In this page you will find the entire instructions book, scanned. I am sharing it because some shops (ex. LIDL) were selling the device without manual.
To download all the images you can use this command in GNU:
wget `seq -f "http://www.danielclemente.com/consumo/manual/p%02g.jpg" 01 46`
. A PDF can be created in this way:
convert p*.jpg manual.pdf
Furthermore, here are other photos:
And some technical data, in Spanish: details of model 9149.
The device was imported by "Paget Trading Ltd. c/o Paget Services. 65-66 Woodrow. London SE18 5DH. UK".
February 2008, Daniel Clemente Laboreo (page). In gmail.com, user: n142857