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DAVID W SPITZER'S E-ZINE (June 2020)

TECHNICAL AND MARKETING SERVICES
FOR INSTRUMENTATION SUPPLIERS AND END-USERS

Level Gauge Performance (Part 2 of 3) by David W Spitzer

A percentage of measured distance statement describes a parameter that is in error by a constant percentage of the actual distance measurement. In the measurement of a 1000 mm high vessel (100% level located 100 mm below the sensor) measured with an accuracy of 1 percent of measured distance, the absolute error can be calculated as:

Natural Gas Flow Measurement: Energy Flow Matters by David W Spitzer

Previous columns discussed that the composition of natural gas can and does vary with location and over time and that its composition may be significantly different than typical the North American Energy Standards Board (NAESB) natural gas. As a result, the energy content, density and thermal properties of the flowing natural gas can also be different. Density and thermal properties can affect the performance of some flowmeters. However, energy content variations can affect all flowmeters intended to measure the flow of energy --- even when the flowmeter produces measurements that accurately reflect the flow of natural gas.

Impulse Tubing Installation (Gas) by David W Spitzer

Where and how should a differential pressure flow transmitter be located for gas service?

ABOUT SPITZER AND BOYES, LLC

In addition to over 40 years of experience as an instrument user, consultant and expert witness, David W Spitzer has written over 10 books and 450 articles about flow measurement, level measurement, instrumentation and process control. David teaches his flow measurement seminars in both English and Portuguese.

 

Spitzer and Boyes, LLC provides engineering, technical writing, training seminars, strategic marketing consulting and expert witness services worldwide.

 

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