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Calculating Equipment Run Hours with Signal From Condition & Histogram

Morgan Bowling

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  • Seeq Team


This example explores two methods for assessing equipment operating conditions per unit of time (i.e. total operating hours per week in this example) using the Signal from Condition tool and Histogram.  The Signal from Condition approach creates a new signal using an equation or statistical function. The Histogram approach transforms a signal into a "value" domain, plotting the distribution of values over a period of time.  For these examples, we will use “Compressor Power (Area A)” from the Seeq demo data and asset framework, which has routine ON/OFF operating cycles.  

The objective in this example is to create Derived Data signals to indicate when a compressor is running and calculate operating hours per week.  


1. Add target signal -- in this analysis we will use Compressor Power (Area A).


2.  Complete a Value Search to determine when the equipment is running.  In this example, I searched the compressor power signal for when it is above 5 kW which indicates it is running. 


 3. Using Periodic Condition, create a Weekly Signal. 


4.  Create a new signal Compressor Run Hours Per Week using Signal from Condition Tool.  



5.  Customize the Signal from Condition as a Bar Graph -- click the Customize button in the Details Pane and select the Bar Chart Icon under the Samples column. Each bar represents the total operating hours of the compressor each week. 



6. Histogram Aggregated by Calendar Week- In this example, we have created a Histogram, Avg Compressor Run Hours per Week, which calculates the average value of the derived-signal, Compressor Run Hours per Week, aggregated by calendar week (Week of Year). 


Content Verified DEC2023






Edited by Tatum OKennedy
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  • Tatum OKennedy changed the title to Calculating Equipment Run Hours with Signal From Condition & Histogram

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