Multi-path Ultrasonic Meter Diagnostics for Field Verification
Dan Hacket, Kevin Chin
Abstract:
Most customers have now started to use ultrasonic meters for natural gas custody transfer metering. As a stand-alone meter, it can give numerous diagnostics information on the performance of the meter, but not enough to determine a benchmark on its performance to a certain reference. This is where external diagnostic would be required to enhance customer's confidence in the overall metering system performance. In this paper, we will focus on these various techniques, and how they are being used. Before we touched on the field verification using SOS on flow computer, we will highlight some of the recent developments in the improving the performance and diagnostics of ultrasonic metering system. They are: • Enhanced/Improved Wet Flow Calibrations • Improved Diagnostic Software • Incorporate Speed of Sound (SOS) calculation in flow computers for on-line verification • Remote Diagnostic We will end with an example and an update on the latest development in AGA-9 [I] Working Group.
