Articles

on 'Automation & IT'

181-200 of 236 < 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
  • How to select control valves, Part 2

    When it comes to selecting and sizing control valves and positioners, this article not only helps you pick the right one for the right job, but also includes a valuable valve selection chart you can download!

    Béla Lipták, PE, CONTROL Columnist
    10/17/2006
  • 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
  • Raising the bar for control system security

    Security researchers at Wurldtech Analytics are partnering with ISA to establish procedures and an operations model for the security testing and certification of products used for control.

    Eric and Joann Byres, principals, Wurldtech Analytics
    10/12/2006
  • Implementing an operations management system

    Things are changing at warp speed. Manufacturing companies are collecting large volumes of data from data systems but improvements are possible only if the data are analyzed and developed into useful business parameters.

    Robert Wojewodka, The Lubrizol Corp.
    09/29/2006
  • Specifying thermal components systematically

    A common mistake made when specifying a heater or its components is not fully appreciating interactions. Taking a systems approach when specifying thermal components can help.

    Christopher C. Lanham, Watlow
    09/21/2006
  • NeSSI tames the communications monster

    The new sampling/sensor initiative (NeSSI) is moving steadily to fulfill its original promise of increased efficiencies, costs-savings, and micro-analytic capabilities despite recent growing pains related to fieldbus.

    Jim Montague, Executive Editor
    09/15/2006
  • Heat integration steps can present control problems

    The more energy prices rise, the more heat integration saves. However, heat integration steps can present complex control problems. Slip-ups in putting control systems in place can make operations nearly impossible. That certainly was the case at one unit using heat recovery.

    Andrew Sloley, contributing editor and Carolyn K. Hawley, VECO USA
    09/13/2006
  • Fieldbus improves control system reliability

    Profibus-PA and Foundation Fieldbus both reduce cabling cost by sharing wiring among several field instruments. They also save money by reducing the number of instrument interface cards required to connect field instruments to the control system. However, they all save money by being able to use the same field transmitter for a wide range of measured variables.

    Dick Caro
    09/11/2006
  • Process analysis gains greater online role

    Faster. Smaller. Smarter. Modular. All express the future of process analytics. And un-stoppable describes the ongoing migration of process analytical instruments to continuous, online, field-mounted use at chemical plants.

    C. Kenna Amos, contributing editor
    09/11/2006
  • HMIs evolve in process control

    New HMI technology is putting a whole new (inter)face on how operators view control systems information, while at the same time driving human error out of systems and improving safe work practices.

    Ian Nimmo, president, User Centered Design Services LLC
    09/11/2006
  • 2006 Readers' Choice Survey

    The equipment, services and suppliers selected to make a job easier greatly contribute to on-the-job success. The Readers' Choice survey identifies the leading vendors in more than 40 categories.

    Ken Schnepf, managing editor
    08/17/2006
  • Avoid Alarm Blunders

    Ineffective alarm systems pose a serious risk to safety, the environment, and plant profitability. Too often, alarm system effectiveness is unknowingly undermined by poorly-configured alarms. Read about these 12 common mistakes that can undermine the management of your alarm system.

    Michael Marvan
    07/12/2006
  • Level transmitter — art not science

    There is much more to setting up a transmitter than a mere equation. Design and control errors can certainly compromise performance. Follow these simple tricks to get it right.

    Dirk Willard
    06/13/2006
  • Nanotechnology raises big concerns

    Nanotechnology is grabbing headlines these days and the growing prospects of its use is spurring increasing attention to safety issues. This article examines the worldwide reaction to burgeoning popularity of the technology and what safety concerns are legit.

    Mike Spear, editor at large
    05/25/2006
  • Meet SIS “User Approval” Mandates

    No manufacturer’s claim, third-party analysis or certification report reduces the user’s responsibility for determining that a product is fit for its purpose. Make sure to properly balance analysis and testing information with field experience.

    Angela E. Summers and Susan Wiley, SIS-TECH Solutions, LP
    05/11/2006
  • Paired processes aim to fuel biodiesel buildup

    The first plant to go from biomass to syngas to biodiesel is slated for 2007 startup. Once started up early next year, the unit will feed in 75,000 mt/yr of wood chips and straw to make so-called SunDiesel.

    05/11/2006
  • Why do you need performance supervision?

    One way to unlock control system secrets is to implement PSS, a smart performance reporting system that can dramatically help save time, money, and prevent problems with your processes.

    05/11/2006
  • Choose the right temperature sensor

    There’s no simple solution to achieving accurate temperature measurement. It’s a combination of knowing the inherent accuracy of particular sensor types, and how environmental factors can create further measurement uncertainty and the sensor calibration techniques available to reduce this uncertainty.

    Cal Swanson, Watlow Electric Manufacturing Co.
    04/24/2006
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