The alert takes the value you set and divides it by 4* to find out what value it shouldn’t exceed at any given interval reading. If one of the 15 minute interval readings exceeds this value it triggers the alert letting you know that if you continue to use this much energy over the course of the next three readings (1 hour) you will exceed the alert you set.

           This is to better let you control your energy use as it lets you know you are on track to exceed the threshold before you actually exceed it in order to protect machines and avoid penalties for exceeding the threshold.

*Water and oil is further divided by 60 in order to find the per minute usage.