Articles

3261-3280 of 4183 < first | | | last >
  • Dispelling the myths of HART-enabled devices

    Even though millions of HART-enabled field devices are installed in locations around the world, myths and misconceptions about this powerful technology for control systems abound.

    04/19/2005
  • Directory of Lost Companies

    Identified in this new Appendix are more than 200 companies whose name, ownership, or product line has changed significantly over the period from 1990 to 2005. Find the company you're looking for here.

    09/28/2005
  • Dining With Hall of Famers

    Over 45 years of process control, the progress has been dramatic; this years inductees have contributed greatly

    06/13/2003
  • DigitalField Insider: Archived issues

    DigitalField Insider covers the latest developments in fieldbus networks and increasingly intelligent, network-capable field devices. Measurement devices as well as control valves and motor drives are complemented by evolving strategies for predictive monitoring, calibration and asset management strategies.

    12/05/2006
  • Digital Positioners Take Over

    Alabama Power Upgrades Damper-Drive Actuators to Digital to Reduce Maintenance of Coal-Fired Generators

    03/08/2010
  • Digital fieldbus networks

    It's not so easy to deploy digital fieldbus networks in existing process plants. Working to upgrade from discrete and analog connections to digital fieldbus networks presents a host of options and challenges.

    02/01/2007
  • Digital data recorders deliver

    This month's Technically Speaking column compares mechanical, analog and digital recorders for data acquisition and concludes that local data logging can be the easiest way to satisfy regulatory requirements.

    03/29/2005
  • Diffusing Bubble Bombs

    Proper Valve Sizing for Severe Service Can Help Lessen Wear and Damage from Cavitation

    11/18/2009
  • Difficult Level Measurements

    “Ask the Experts” is moderated by noted process control authority Béla Lipták (liptakbela@aol.com), editor of the Instrument Engineer’s Handbook. In this column, he and his co-authors welcome questions concerning process measurement or control. Please include P&ID drawings using ISA symbols to illustrate questions where necessary.

    10/02/2007
  • Diagramming drum level control

    Harold Wade suggest a few additional points be made to the three-element boiler level control figures in a previous article that show how signals from the steam flow FT and the drum LT combine in the LIC.

    10/16/2006
  • Diagnostic Motor Problems

    Keep Your Motors Humming. Diagnostics Can tell You When a Motor Is Having Problems, but You May Still Need to Keep Your Meters and Meggers Available

    05/13/2009
  • Diagnosing Final Control Elements

    McMillan and Weiner Ask James Beall What Was the Biggest Step Forward that Helped Him Improve Valve Performance

    Greg McMillan, Stan Weiner
    12/07/2012
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