## Six Steps To Optimizing Your Compressed Air System – Step 1: Measure

“To measure is to know – if you cannot measure it, you cannot improve it.”
-Lord Kelvin, mathematical physicist, engineer,and pioneer in the field of thermodynamics.

This is true of most anything. If you want to lose weight, you’re going to need a good scale. If you want to improve your time in the 100 yard dash, you’re going to need a good stopwatch. And if you want to decrease compressed air consumption, you’ll need a good flowmeter. In fact, this is the first of six steps that we can use to help you optimize your compressed air system.

There are various methods of measuring fluid flow, but the most popular for compressed air is thermal mass air flow.  This has the distinct advantage of accurate and instantaneous measurement of MASS flow rate…which is important, because measuring VOLUMETRIC flow rate would need to be corrected for pressure in order to determine the true compressed air consumption.  My colleague John Ball explains this in detail in a most excellent blog on Actual (volume) Vs. Standard (mass) Flows.

So, now we know how to measure the mass flow rate.  Now, what do we do with it?  Well, as in the weight loss and sprint time improvements mentioned earlier, you have to know what kind of shape you’re in right now to know how far you are from where you want to be.  Stepping on a scale, timing your run, or measuring your plant’s air flow right now is your “before” data, which represents Step One.  The next Five Steps are how you get to where you want to be (for compressed air optimization, that is – there may be a different amount of steps towards your fitness/athletic goals.)  So, compressed air-wise, EXAIR offers the following solutions for Step One:

Digital Flowmeter with wireless capability.  This is our latest offering, and it doesn’t get any simpler than this.  Imagine having a flowmeter installed in your compressed air system, and having its readings continually supplied to your computer.  You can record, analyze, manipulate, and share the data with ease.

Digital Flowmeter with USB Data Logger.  We’ve been offering these, with great success, for almost seven years now.  The Data Logger plugs into the Digital Flowmeter and, depending on how you set it up, records the flow rate from once a second (for about nine hours of data) up to once every 12 hours (for over two years worth.)  Pull it from your Digital Flowmeter whenever you want to download the data to your computer, where you can view & save it in the software we supply, or export it directly into Microsoft Excel.

Summing Remote Display.  This connects directly to the Digital Flowmeter and can be installed up to 50 feet away.  At the push of a button, you can change the reading from actual current air consumption to usage for the last 24 hours, or total cumulative usage.  It’s powered directly from the Digital Flowmeter, so you don’t even need an electrical outlet nearby.

Digital Flowmeter.  As a stand-alone product, it’ll show you actual current air consumption, and the display can also be manipulated to show daily or cumulative usage. It has milliamp & pulse outputs, as well as a Serial Communication option, if you can work with any of those to get your data where you want it.

Stay tuned for more information on the other five steps.  If you just can’t wait, though, you can always give me a call.  I can talk about compressed air efficiency all day long, and sometimes, I do!

## You Can’t Manage What You Don’t Measure

And this was never more true than in a conversation I had with the facilities engineer at a manufacturing plant recently. Their business has grown so much over the past few years to cause a move into a larger building. They took this opportunity to install some engineered compressed air products, and, with the brand-new building, they also got brand-new compressed air piping, which the contractor has just completed post-installation testing on, and it’s leak free. Good news!

They noticed, however, that the run time hours on their air compressors (which were in fine shape, and simply moved from the old facility) hadn’t appreciably decreased. The engineer was looking for another way to measure…and quantify…their compressed air usage, and was interested in our Digital Flowmeters.

Of primary concern during our conversation was, how could they track their usage? Would someone have to check the Digital Flowmeter reading periodically? What about intermittent uses? They have a TON of hand-held air guns throughout the plant…what if they read the meter when only a few were in use? Or if they ALL were in use?

There are a couple of options for that…our Digital Flowmeters are all supplied with both 4-20mA and RS-485 Serial connections, which are easily outputted to an appropriate device. You can run this right to your computer, and there are a variety of programs that will allow you to collect and manage this data.

They intend to install this Digital Flowmeter in the compressor room, though…and even though it’s well within the maximum distance for RS-485 serial – it’s good for distances up to 4,000 feet (1,200 meters,) it would be impractical to run a cable through the building.

Enter the USB Datalogger: this is going to allow them to “take a snapshot” of their usage, at specified intervals…in this case, every 10 seconds, which means the USB Datalogger will collect and store data for over three days. It has its own proprietary software, which you’ll use to set the frequency of readings, choose units & graph scale, high/low alarm points (if desired) and even when you want to start recording. This would, for example, let you record data on the mid-shift, without staying at work until midnight to start recording. VERY convenient, as far as I’m concerned.

Once it’s installed and running, I hope to work with them on the next steps towards optimizing their compressed air system…but we’re off to a good start!

If you want to talk about getting the most out of your compressed air system, give us a call. We’re here to help.

Russ Bowman
Application Engineer
Find us on the Web

## Monitoring Is Apparently The New Thing To Do

Over the past month, I have been loosely watching the events revolving around a former government contractor, Edward Snowden.   The contractor leaked classified information about how the NSA monitors the US citizens.   This has of course brought on a large amount of news coverage and lots of questions from the US citizens to the government.  Others have been able to turn it into a laughing matter like Jimmy Kimmel did on his show.   Below is the commercial Jimmy did for the NSA on his show.

So with all the talk about how every little thing you do is monitored, and I am probably going to end up on several lists for keywords in this blog, why not begin your own monitoring campaign.

EXAIR offers a full line of monitoring devices for your compressed air system, after all it’s the first step in the 6 Steps To Compressed Air Optimization.  The best part of our offering is that you can not only use the EXAIR Digital Flowmeter to monitor your compressed air system, when combined with the Summing remote display and/or the USB Data Logger, you can also collect the data from the meter.

The complete setup will allow you to easily see, and calculate, your cost savings before and after you implement an Intelligent Compressed Air product.

If you have any questions on how EXAIR can help you monitor your compressed air system, give us a call, chat, fax or e-mail.

Brian Farno
Application Engineer
BrianFarno@EXAIR.com
@EXAIR_BF