Articles

121-140 of 167 < first | | | last >
  • Keep measurements on the level

    This article looks at six technologies — mechanical floats and displacers, differential pressure, capacitance, ultrasonic, radar, and guided wave radar — that are used most often for automated control, and provides practical guidance for choosing among them.

    Jerry Boisvert, Siemens Energy & Automation
    11/01/2006
  • Wireless devices may get a shake up

    Last month’s ISA Expo in Houston clearly showed how much attention wireless technology is attracting. However, concern about the reliability and life of batteries remains an issue. That’s why harvested or scavenged power is attracting interest.

    Mark Rosenzweig, editor in chief
    10/31/2006
  • Welcome to the Bus Wars, Part Tres

    You may not be aware, but a new bus war is being waged in your plant — the battle of the motion networks. Control Global's Senior Tech Editor Dan Hebert, PE, provides analysis and commentary on the newest battle over fieldbus.

    Dan Hebert, PE, Senior Technical Editor
    10/17/2006
  • Sasol plant benefits from reliability improvements

    Sasol Solvents reduced operating costs by more than $2 million dollars at it’s plants in Sasolburg, South Africa. The efforts earned the facility the 2005 HART Plant of the Year Award.

    Dirk Willard, senior editor
    09/14/2006
  • Cutting the wires of communications

    Users want wireless, vendors want to sell wireless, so what’s the problem? This article tackles one of the most discussed topics: the use of wireless communications in process automation.

    Walt Boyes, Editor in Chief
    08/15/2006
  • Plants smarten up

    Smart field devices can be a smart investment to better manage assets and thus boost competitiveness. These devices are increasingly being relied for analysis as well as data collection.

    C. Kenna Amos, contributing editor
    06/13/2006
  • Fieldbus Wars continue: EDDL vs. FDT/DTM

    Fieldbus technology expert Dick Caro predicts that as Ethernet-based control networks converge into the domain of fieldbus, there will eventually be a conflict between OPC/DX, FDT/DTM, and EDDL.

    10/12/2005
  • Today’s China Syndrome

    The country boasts not just booming exports but a strong desire for the best technology.

    Mike Spear, editor at large
    09/27/2005
  • EDDL enhancements gain momentum

    Several major vendors have now announced plans to fully support enhancements to the electronic device description language (EDDL) used by HART devices, reports Ed Ladd of the HART Communication Foundation. These enhancements will allow users to interact with their intelligent devices in new ways. They ease configuration, even of complex instruments, and support storage of historical data for troubleshooting and diagnostics.

    Ed Ladd
    08/16/2005
  • Make the most of HART-enabled field devices

    HART-enabled field devices offer many benefits and not just for process control. They can lead to productivity gains, maintenance savings and more efficient and accurate recordkeeping.

    Dan Prugar, Meriam Process Technologies
    08/11/2005
  • HART has staying power

    Despite the appearance of digital fieldbus technology in plants, well-proven HART technology still has a viable long-term role, notes Ed Ladd of the HART Communication Foundation. He adds that industry consultants predict that HART easily will be supported and remain a significant communications technology for the next 20+ years.

    Ed T. Ladd, Jr., HART Communication Foundation, Austin, Texas
    07/13/2005
  • Process Engineering: HART Offers Value in Plant Control Systems

    There's a myth in plants that HART offers little for Plant Control Systems and Enterprise Level Networks. But Ed Ladd from the HART Communication Foundation writes that by accessing the data in HART devices on a "full-time" routine basis increases performance, integrity, and reliability of plant control and enterprise level systems.

    Ed T. Ladd, Jr., HART Communication Foundation, Austin, Texas
    05/11/2005
  • Process engineering: Dryer provides a concrete lesson in control

    Removing water or moisture from a liquid stream is a critical operation in many processes. Liquid stream dryers commonly contain either molecular sieves or adsorbents; during the last 20 years, the use of molecular sieves has become much more common.

    Andrew Sloley, contributing editor, and Richard Readshaw, senior staff process engineer for VECO USA Inc.
    05/03/2005
  • Process Engineering: HART – Dealing with device description

    There is a myth surrounding HART devices that you'll need a device description to communicate with a HART device. Learn why this isn't true and what you do need to know in operating a HART communication device.

    Ed T. Ladd, Jr.
    04/12/2005
  • Process engineering: Doing your level best

    Plant engineers who find it is difficult to get good level measurements have plenty of company. A recent poll shows that it is considered to be one of the two most vexing problems by process automation professionals.

    04/08/2005
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