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Title: Orifice Meter Gauge Calibration Using Portaele Digital Pressure Indicator
Author: Leo R. Lombardo
Source: 1990 International School of Hydrocarbon Measurement
Year Published: 1990
Abstract: What is an inch of water? The correct answer to this question has taken on increased importance with the demand for better cLCcuracy and the introduction of digital pressure indicators, For example, lets assume that you have just received your new digital pressure indicator and you decide to verify its accuracy. The manufacturer claims 0.1% accuracy at 100 inches of water. You set up a test using a deadweight tester and a water manometer. After placing a 100 inch of water weight on the deadweight tester, you record a reading of 99.8 inches of water on the digital pressure indicator and 100.2 inches of water on the manometer. Which is right? The answer to this question will be evident after the following discussion of manometers and dead weight testers and their relationship to digital pressure indicators. I wi 1 also include a discussion of accuracy and re5olution as it applies to digital pressure indicators.

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