George’s CBAS Tips, May 2019

Did you know that you can set up groups of users in CBAS that have the same rights as individual users?

To add users and groups in CBAS, go to System, then Program Passwords and you will see the user list:

It’s good practice to create a user and password for everyone who will be using CBAS. Typically, your most experienced users will have rights to view, command, and program nearly everything in the system. Meanwhile, security users might only have rights to see Activity View and acknowledge alarms, but must log in to do so. You might also have less experienced engineers who are only allowed to view data in the system without the ability to command points or make changes to programming.  

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CBAS Web Update

Security vulnerabilities in Computrols’ CBAS Web were recently identified and patches for these vulnerabilities have been rolled into the latest release of the CBAS Web software. The Computrols team worked rapidly to patch the affected sites and address these vulnerabilities. As usual, customer security and satisfaction are our top priorities. If your site has been patched, you should have been notified by a member of the Computrols team. If you are unsure if your site has been patched, please contact your Computrols representative or call 504-529-1413 to speak with our tech support team.

 

Enthalpy as it relates to free cooling in HVAC

Enthalpy is defined as the amount of internal energy within a system combined with the product of its pressure and volume. When dealing with the term in the HVAC industry, we usually assume that the process is at a constant pressure and, as such, the change in enthalpy is equal to the heat absorbed or released. At its core, the main function of an HVAC system is to transfer heat, which is a form of energy. The first law of thermodynamics, the Law of Conservation of Energy, tells us that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another. From that, we can infer that the only way to cool a space down is to remove the heat energy and transfer it somewhere else, typically outdoors. This is generally accomplished by absorbing heat from an airstream and then distributing this cool air to the area we wish to control; it helps to think of conditioned air like a sponge with the capacity to ‘soak up’ heat. The air, now laden with unwanted heat, is routed back via a Return Air pathway to start the process over again. The newly absorbed heat is ‘wrung out’ and expelled, and the cool air is distributed again in a constant cycle. This ‘wringing out’ process is mainly accomplished by mechanical cooling, such as a compressor, or free cooling provided by an air-side economizer.

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Cloud Computing + Connectivity = IoT

I recently learned that April 9th has been dubbed “IoT day”, but what exactly is IoT and when is it happening? The vision of IoT or “the Internet of Things” is to interconnect anything and everything that one could imagine. With such an ambitious goal, there is no wonder why there is now a day dedicated to this vision, but where are we with IoT and how will it impact the buildings that we live, work, learn, and play in?

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A New Software Feature in Less than 24 hours

I recently visited one of our customers who expressed to me the fact that he really likes the header points feature in CBAS but wished that he could have more than two points. For those of you not familiar, this software feature allows for you to display any two database points just under the menu bar. These points and their values are displayed consistently regardless of what user is logged in. Furthermore, as with all CBAS point values, the values are updated in real time.

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Computrols Takes Training On The Road

This week, Computrols brought our CBAS Level I training course to three of our customers in Southern California. Computrols Manager of Strategic Partnerships, Mike Clayton was joined by our Dallas Branch Manager, Jeff Burnett, and Southern California Branch Manager, Andrew Walton, in conducting training courses onsite at National University, the San Diego Airport Rental Car Facility, and the Intersect Campus in Irvine.

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George’s CBAS Tips, February 2019

History Save Settings

I think everyone who is familiar with Computrols Building Automation Software (CBAS) is aware that CBAS automatically saves History data, also known as “Trend” data, on all points in the database.  When dealing with Analog points, the frequency and resolution of these graphs is automatically set for you by CBAS. Did you know it is possible to see more detail on a graph?

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5 Energy Conservation Measures with Quick Returns

The Energy Cost Index (ECI) is the measurement of cost per square foot per year of conditioned space in a facility ($/ft²/year). The average ECI of electricity for an office building in the U.S. is about $1.73/ft²/yr according to the U.S. Energy Information Administration. What are you doing to reduce your ECI?

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