i've used this to help me retire some my not so power efficient home theater stuff... particularly the 110v or auto-volt equipments... for 220, I connected it this way
220VAC <-> AVR 220-to-110VAC <-> Kill-A-Watt <-> 110VAC-to-220VAC <-> 220VAC equipment to be measured
try this...
Are Watts killing you?
It's pretty well known that electrical power is at the core of a geek's existence. It breathes life into our entertainment, hobbies, our work and probably a lot of other stuff too. But getting a good grasp on how much power various devices consume can be somewhat difficult to reckon.
The Kill-A-Watt allows you to connect your appliances and assess how efficient they are. A large LCD display counts consumption by the Kilowatt-hour, just like utility companies. You can figure out your electrical expenses by the hour, day, week, month, even an entire year. Monitor the quality of your power by displaying Voltage, Line Frequency, and Power Factor.
Also has these great features.
Enables cost forecasting
Accurate to within 0.2%
Cumulative killowatt-hour monitor
Displays Volts, Amps, Watts, Hz, VA, KWH, Power Factor
Operating voltage: 115 VAC
Max current: 15 A
Max power: 1875 VA
Dimensions: 5 1/8" X 1 5/8" X 2 3/8"