Electricy sensor bad reading

I’ve attached the sensor to my Arduino Uno and uploaded the example sketch posted in the Wiki.
I obtain very strange and enormous value, the reading is in some ways related and to the real utilization (a 18W lamp)… when I turn OFF and ON the lamp the value change, but the value are really very big! like 7.5A (it cannot be possibile because the lamp is only 18W).
How I’m wrong?


Can you please send us the photograph of the experimental setup and screenshot of serial monitor output.

Thanks and Regards