Our typical compressed air system audit lasts for 1 week, 168 hours or 10,080 seconds. We install data loggers for pressure, flow, amps and voltage. We perform a full plant walkthrough, an examination of all applications that use compressed air, and we also perform an ultrasonic leak audit.
All of this logging produces a lot of data. Since our equipment records in seconds, 10,080 lines of data is produced for each item that is data logged. All of this information can be graphed and charted. For those of us who analyze the data, these graphs and charts can prove invaluable, allowing us to assess systems in microscopic detail. Our audit software has 19 graph formats, and each of these 19 graphs can be produced for the week or by the day, creating 133 graphs. We also have 12 chart formats that can be produced for the week, or by the day, creating 84 charts.
We are often invited to explain compressed air audits prepared by other auditors where every possible graph and chart has been used, printed and delivered to a customer with a single paragraph telling the customer that all they need to do is buy a new variable speed drive air compressor to solve their compressed air system problems.