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DAVID W. SPITZER'S E-ZINE

TECHNICAL AND MARKETING SERVICES
FOR INSTRUMENTATION SUPPLIERS AND END-USERS

This issue sponsored by Spitzer and Boyes, LLC

August 2012

Foundation Fieldbus™ Control (Part 3 of 4)

FOUNDATION™ Fieldbus must maintain tight scheduling required of any process control system on a distributed Field Control network. In other control systems, control is scheduled and calculated within a device in the control system, such as a multifunction controller. With Field Control, the control is distributed around the network into many devices, so function block initialization is an issue. click for more...

Part II: What Would You Do?
Resonding to the Nozzle-less Horizontal Extractor

Last month I described the operation of a horizontal extractor whose outlet flow of "clean&" water at one end of the extractor was controlled using the interface level on the opposite end of the extractor. This did not seem logical because there was a significant distance between the interface level measurement and the control valve that would cause a relatively long time delay. click for more...

Measuring Pressure in a Tank

A tank at atmospheric pressure contains 1 kg of air. The tank is pressurized with 2 kg of additional air. What is the pressure in the tank after the 2 kg of air is added? click for more...

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ABOUT SPITZER AND BOYES, LLC

In addition to over 35 years of experience as an instrument user, consultant, and expert witness, David W Spitzer has written over 10 books and 250 articles about flow measurement, level measurement, instrumentation, and process control. David (with Walt Boyes) is the author of seven Consumer Guides to various industrial flow and level technologies. David teaches his flow measurement seminars in both English and Portuguese.

Spitzer and Boyes, LLC provides engineering, technical writing, training seminars, strategic marketing consulting, distribution consulting, and expert witness services worldwide, and can be contacted at +1.845.623.1830 or www.spitzerandboyes.com.

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