ADE7753 and Arduino

I and my friends are making a project using an energy meter called ADE7753 and we found a library for this chip, but we aren't quite sure if this library is giving us the right values of energy and we also are having troubles to calibrate this chip. We are using a hall effect sensor for measuring current . Any help is appreciated!

Library: http://migre.me/trwhL

Datasheet: http://www.analog.com/media/en/technical-documentation/data-sheets/ADE7753.pdf