Process Engineering White Papers

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  • 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
  • Theory and practice of pH measurement

    This 43-page guide covers the basic mechanism of pH measurement, the structure of the sensor and its fundamental limitations, and also provides installation, maintenance and troubleshooting guidance.

    Rosemount Analytical
    01/04/2005
  • Tracing the accuracy of calibration gases

    Calibrating your instruments using specialty gas will only yield results as accurate as your gas mixture. This three-page white paper discusses analytic traceability and how it relates to gas mixture accuracy.

    12/29/2004
  • 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
  • Achieve 21 CFR Part 11 Compliance

    This technical white paper discusses Yokogawa’s CENTUM CS 3000 R3 DCS (Distributed Control System) product and the extent of its compliance with Part 11 of Title 21 of the Code of Federal Regulations (21 CFR Part 11), the Electronic Records/Electronic Signatures Rule.

    10/12/2004
  • Succeed at Alarm Management

    Today's control system make it easy to add alarms. The result has been a proliferation of alarms that can overwhelm an operator and actually obscure situations that really require immediate attention. This paper provides practical guidance on effective procedures that can significantly reduce nuisance alarms and improve operator effectiveness.

    D. Shook, PhD, P.Eng., Matrikon, Inc.
    10/11/2004
  • Succeed at Dynamic Modeling of Batch Reactors and Batch Distillation

    This paper reviews the basic techniques for dynamic modeling of these two key operations. It covers considerations related to heat transfer, reaction chemistry, mass balances and the control system. It also discusses equipment configurations, performance characteristics and operational constraints.

    09/08/2004
  • Selecting Transmitters for Safety Instrumented Systems

    This paper presents best practices that allow the user to quantify the impact of real-world failure causes and to take credit for improvements in system design. Besides selection, it also covers installation and maintenance.

    DuPont Fluoroproducts and Rosemount Inc
    08/27/2004
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