If your goal is to split a measure out by hour of the day it might be easiest to just add the time field on as discrete and set it at the hour level. Below is a picture of what this looks like. If you need to use bins you could us the datepart function to grab the hour of each record and then create a bin off of that calculation since bins can only be calculated from measures. Hour calc: DATEPART('hour',[Date])
Thank you, this was helpful.