BirdDog Version 4.0

BirdDog™ Information Systems is pleased to announce the release of Version 4.0 of Remote Data Retrieval. This newest system, to which you automatically have access when you log into our host site, provides enhanced features that are certain to make you even more productive... such as a more streamlined and intuitive user interface, the ability for end-users to perform ad hoc changes to alarm settings, and layered administration. With layered administration, end-user organizations can assign BirdDog client administrators who, in turn, will be able to add/delete other enterprise users, set each user's rights (from read-only through full editing, including use of Demand Polling), reset user passwords, add/delete Morning Report recipients, and much more.

In addition to the BirdDog Remote Data Retrieval system functional enhancements, we've also deployed new security provisions to further complement our previously implemented use of an HTTPS website to provide full SSL encryption of your sensitive and proprietary information. These enhancements include the use of unique email addresses as User IDs, as well as stronger Password requirements with history restrictions and forced routine changes. As before, with just a single account User ID and Password, your log-in will provide direct access to all BirdDog SaaS (Software-as-a-Service) systems to which you have end-user rights. And as you add or remove systems from your user profile, the single sign-on process will automatically recognize those changes.

BirdDog Security Policy Change Alert

Security Policy Change Alert - For the enhanced security of BirdDog™ Information Systems users, effective November 11, 2013, User IDs will be unique email addresses and account password requirements will be strengthened. New passwords will need to be at least 8 characters in length and contain at least one each of the following characters: uppercase alphabetical; lowercase alphabetical; numeric; and “special” (such as @, &, _, #, etc.). At the appropriate time, you will be prompted during your BirdDog log-in to click on a webpage link that will provide more details and guide you through your password change process.

BirdDog System Support

  • Log-in and system support, including password resets, are available to customers on a 24x7 basis by calling, toll-free, 800-231-9741. During business hours (8:00 a.m. until 5:00 p.m. Central Time, Monday through Friday), your call will be directed to the appropriate technical support or customer service team member.

  • During non-business hours, callers will be presented with a main menu which includes an option to reach system support and, if appropriate, to mark your message as “urgent” for an expedited response. Non-urgent support calls will be returned the next business day.

  • System support requests or questions may also be submitted via e-mail to

Coastal Flow Measurement Companies
Proving the Value of Quality
Service Since 1974


Pressure...what pressure?
Date: 11/21/2014

Among the most misunderstood and misapplied terms used in natural gas measurement are Pressure Base, Atmospheric Pressure, Gauge Pressure, and Absolute Pressure.  Not only are these expressions easy to confuse, when their values are incorrectly applied within the flow equation, measurement error is introduced…and oftentimes that error can be severe.  Understanding these fundamental terms and how they are applied is of vital importance to those involved in every phase of gas measurement, accounting, and regulatory reporting.  The following is a brief definition for each of these terms:

  •  Pressure Base is the pressure at which a volume occupies one standard cubic foot (scf), as defined by contract, expressed in pounds per square inch absolute (psia).  State regulatory agencies will often require that volumes are calculated at different pressure base conditions (e.g., 14.65 psia for Texas and Oklahoma, and 15.025 psia for Louisiana and Mississippi).
  • Atmospheric Pressure is the amount of pressure created due to the weight of the atmosphere (air and water vapor), expressed in pounds per square inch (psi).  These values vary with elevation above sea level.  For example, the average atmospheric pressure at sea level is usually assumed to be 14.696 psi while the average atmospheric pressure at higher elevations is less (e.g., 11.2 psi in the Rocky Mountain region).
  • Gauge Pressure is a measure of the amount of pressure which is greater than atmospheric pressure, expressed as pounds per square inch gauge (psig).
  • Absolute Pressure is the sum of the gauge pressure and the atmospheric pressure used in all gas law equations, expressed as pounds per square inch absolute (psia).

Because these values can be similar, it’s very easy to enter incorrect data for configuration, calibration, or meter set-up.  Accordingly, it is important to know how they are used in the flow equation and how they should be correctly applied to avoid systematic measurement error, as indicated in the following simplified volume calculation:



As an example, using a Coefficient (C’) of 10.016, Absolute Pressure (Pabs) of 34.696 psia [Atmospheric Pressure of 14.696 psi + Gauge Pressure of 20 psig], and Differential Pressure (?P) of 50 inches of H2O in the flow equation above produces a calculated rate (Q) of 417 Mcf per day at a Pressure Base of 14.65 psia.  However, with a simple misunderstanding of how Absolute Pressure is determined, a 24% error (understatement) would be introduced if the calculation were performed using Gauge Pressure rather than Absolute Pressure.  As this demonstrates, it is critical that these pressure values are properly applied to avoid costly errors which could affect natural gas measurement, accounting, and regulatory reporting.



“The real definition of ‘Absolute Pressure’ is third-day close-out after a holiday weekend!”

~ Anonymous, Gas Measurement Analyst

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Coastal Flow Measurement, Inc.
P.O. Box 58965 , Houston, TX, 77258-8965
Phone: 281.282.0622; Fax: 281.282.0792