In other words, to get something visually meaningful 1, I needed to plot: One of the challenges that came up when I was creating the time series graph of a 9,000 ton chiller plant load profile that I show in my previous post was that I wanted to plot data series that had numbers in them with very large differences in the order of magnitude. But it also now includes a more practical example in the form of a chiller kW per ton profile. Mostly, I improved the instructions to make it more user friendly. Authors Note : I made some improvements to the third axis tool that is mentioned in this post and uploaded it to the page associated with it on the Commissioning Resources web site.