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Title: Orifice Meter Gauge Calibratlon Using Portable Digital Pressure Indicator
Author: Leo R. Lombardo
Source: 1991 International School of Hydrocarbon Measurement
Year Published: 1991
Abstract: What is an inch of water? The correct answer to this question has taken on increased Importance with the demand for better accuracy 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?

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