In this free video tutorial, Mike Thornton covers in detail how to setup and use each of the instruments that come in both RTW Loudness Tools and RTW Mastering Tools. These are the PPM Instrument, Loudness Sum Instrument, Loudness Numeric Instrument, Loudness Range Instrument and Stereo Correlator Instrument. 

There also videos that cover the common features of both Loudness Tools and Mastering Tools and another video which will cover the instruments that are only in RTW Mastering Tools. 

If you want to learn more about general loudness principles then Mike Thornton has produced a detailed tutorial series Understanding Loudness covering the concepts behind the new loudness workflows as well as tips and tricks to help you deliver loudness-compliant content.