Process Engineering White Papers

61-80 of 87 < first | | | last >
  • Process Control Network Security - Reference Architecture

    This document describes best practices for the reference architecture for a process control system network and its interfaces to a corporate network. The paper’s objective is to give the reader an understanding of the techniques utilized to securely connect these networks.

    Invensys
    01/11/2006
  • Design Tips for Sensing Probes

    This application note from Delta Controls outlines selection and installation criteria for using admittance probes to monitor the level of powders, liquids and other materials. Dielectric constants of more than 200 materials are included.

    Delta Controls
    01/05/2006
  • Continuous imaging fluid particle analysis: A Primer

    This paper looks at the issues associated with fluid particle analysis, discusses some of the historical methods used, and introduces a new technology: the continuous imaging fluid particle analyzer.

    Fluid Imaging Technologies
    11/14/2005
  • Accurate liquid phase density on aerated liquids

    This white paper discusses SONAR-based, clamp-on gas volume fraction meters which recently have been introduced to the industry that provide an accurate, real time, measurement of entrained gases. Coupling entrained gas volume fraction monitor with most types of process density meters, enables accurate determination of liquid and the liquid-solid components of aerated mixtures.

    10/18/2005
  • Specifying industrial fieldbus networks for automation

    Automation designers face many challenges and tradeoffs in the development of a successful network solution. This white paper discusses the necessary choices in selecting a network technology appropriate for various specific applications.

    Texas Instruments
    10/12/2005
  • Securing Process Control Network External Communications

    In the real world, sharing PCN data with external systems and accessing PCN systems from external sources is fast becoming a business necessity. This paper provides some generic guidelines for enabling secure connectivity between PCNs and external systems.

    Honeywell
    09/16/2005
  • PACs for industrial control: The future of control

    With a number of vendors producing Programmable Automation Controllers that combine the functionality of a PC and reliability of a PLC, PACs today are increasingly being incorporated into control systems. This white paper explores the origins of the PAC, how PACs differ from PLCs and PCs, and the future direction of industrial control with PACs.

    National Instruments
    09/14/2005
  • Electro-hydraulic system design: Making the right system choices

    Designers who understand and can take advantage of the differences between fluid power and traditional electromechanical power can build machines that produce higher quality output with lower lifecycle costs. This white paper suggests that care must be taken, however, in selecting and sizing the hydraulic system elements and in tuning the motion controller for optimal performance.

    Delta Computer Systems
    08/16/2005
  • Technology expands flowmeter capabilities, reduces costs

    Capacitance-type magnetic flowmeters have traditionally offered the advantage of having non-wetted electrodes and the ability to measure low conductivity fluids. However, they suffered from a sensitivity to flow noise and zero instability. Innovative technology overcomes these limitations and drives magnetic flowmeters into new areas of application, while reducing installed costs.

    Yokogawa
    07/18/2005
  • Bearing isolators 101

    A bearing isolator is a non-contact, non-wearing, permanent bearing protection device. It has a rotor and a stator, and the two are unitized, so that they don’t separate from one another while in use. Typically, the rotor turns with a rotating shaft, while the stator is pressed into a bearing housing. The two components interact to keep contamination out of the bearing enclosure and the lubricant in.

    Inpro
    05/17/2005
  • Fisher control valve handbook

    This 295-page PDF whitepaper is a control valve resource that has been consistently updated for 30 years. It contains vital information on control valve performance and latest technologies.

    Fisher
    04/04/2005
  • How to control a process with long dead time

    A process with a large dead time presents a special challenge for a controller --  any controller. This short paper explains how to get the best control of large dead time processes.

    ExperTune
    01/11/2005
  • Level measurement of bulk solids and powders

    This 26-page white paper from Monitor Technologies discusses the difficulties in measuring bulk solids and powders in bins, silos and hoppers.  Download this document to learn which technologies are out there that can make this job easier.

    Monitor Technologies
    01/03/2005
  • Ziegler-Nichols Tuning Rules And Limitations

    The standard reference for PID tuning seems to be the Ziegler-Nichols tuning rules developed in 1942 on a pneumatic controller. Here is how to tune a controller using these rules.

    ExperTune
    11/19/2004
  • Understand Pump Lifecycle Costs

    This 22-page paper from the Dept. of Energy, Hydraulic Institute and Europump explains the importance of understanding the total costs of ownership to achieve savings in energy, and operational and maintenance costs. It discusses what lifecycle cost is, what should be considered in a lifecycle cost analysis, and the role of proper pump system design.

    11/08/2004
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