If you cannot view this email, please click here

Spitzer and Boyes, LLC Website




This issue sponsored by Spitzer and Boyes, LLC

December 2015

Pump Control with a PLC (Part 3)

Al Pawlowski suggests that it is also very useful to add a contact to the HOA switch "auto" position so that the PLC can tell when the pump is not ready to be called. A pump can be out of service for maintenance, or it can have previously failed. click for more...

Part X: A Coriolis Mass Flowmeter Emerges As An Alternate Solution

If you’ve followed this column for most of 2014, you know that what should have been a liquid ammonia stream to the feed plant became problematic due to the occurrence of bubbles of ammonia gas. These bubbles caused an ultrasonic flowmeter in a unit to indicate zero flow and caused the reactor to scram (shut down) under warm operating conditions. The source of the bubbles was traced back to the pressure drop associated with a control valve located at the exit of the liquid ammonia tank farm. click for more...

Variable-Speed Energy Savings

Reducing the motor speed of a constant-torque pump reduces the energy consumption of the motor. When the motor is operated at 80-percent speed, what is the approximate motor energy consumption expressed as a percent of the full-speed motor energy consumption? click for more...



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 publishes the Industrial Automation INSIDER that is an independent subscription newsletter for industrial automation and process control system users, installers and suppliers world-wide, giving a monthly update on the continuing evolution, development and convergence of automation technologies.

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.


ISSN 1538-5280
©2015 Spitzer and Boyes, LLC
The content of this message is protected by copyright and trademark laws under U.S. and international law. All rights reserved.