What You Need to Know About Flow Meter Calibration

October 4, 2021

Flow meters are used to track the rate at which fluid or gas passes through the system. Over time, even high-quality flow meters will start to fall out of calibration, so regular calibrations make sure the measurements coming from the meter are as accurate as possible.

Here’s a quick overview of some best practices for flow meter calibration.

How do I calibrate my flow meter?

Standard best practices for flow meter calibration include the following:

  • Accuracy: Any standard you use for calibrating your flow meter should be accurate enough for the calibration to be performed. The standard should be at least four times more accurate than the device being tested. This can vary slightly based on the requirements for the calibration, but the general idea is that whatever instrument you’re using, it had better be accurate itself.
  • Flow rate: The flow rate between the device under test (DUT) and the calibration standard should be steady. This is because the flow rate of the standard and the DUT get compared in real time, so fluctuations in the system flow rate could make taking these readings challenging.
  • Traceable: The standard you are using for your calibration should be traceable to a clear, recognizable standard. It’s important to have documentation in place that shows how the measurements taken compare to standards of even greater accuracy. Having traceable measurements allows you to later demonstrate your measurements from your flow meter are accurate, within certain ranges.
  • Simultaneous: All media being measured by your calibration standard should be measured by the flow meter simultaneously. There should not be any leaks in the system, or any major changes to the temperature in intermediary volumes that might result in changes or inaccuracies with the measurement.
  • Conditions: Calibrations should always be performed in similar conditions to what is typical of the actual operation of the flow meter. Without performing the calibration in those conditions, there’s no way to guarantee the accuracy in actual usage conditions will be sufficient. This means achieving the same or very similar density, heat and viscosity of the medium that you are measuring.

Where do I get my flow meter calibrated?

Texas Measurement & Calibration Solutions, LLC offers a wide range of calibration services for clients throughout Texas. We measure parameters such as audio, chemical, electrical, force, humidity, mass, pressure, temperature, time, frequency and more. All of our calibration services are backed by NIST traceable certification.

Our services are available for all clients, regardless of your scale manufacturer, the installer you used or the age of your equipment. We work with flow meters ranging from 1 GPM to 800 GPM, and flow meters of all types and categories, including differential pressure meters, mag meters, Venturi meters, ultrasonic meters, displacement meters, Coriolis meters, Roots meters and more.

Want to learn more about the capabilities we have with regard to our flow meter calibration and other service offerings? Get in touch with the team at Texas Measurement & Calibration Solutions, LLC today with your questions—we’d love to show you how we can assist your operation.

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