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.
Why Process Safety Management Audits Fail
Most companies have completed at least three process safety management(PSM) compliance audits of their covered facilities since the promulgation of the OSHA PSM standard. These companies, however, are not seeing noticeable improvements in their PSM programs. In fact, many companies feel that their PSM programs have become less effective. What has happened and why? Are there any lessons learned from the Enron collapse and its auditing program? What needs to be done?
What is a Bearing Isolator?
A bearing isolator is a non-contact, non-wearing, permenant bearing protection device. Read about they can be effectively used in your plant.
Understanding Regulated Health and Safety Standards--Part 1
This paper provides the viewpoint of the American Conference of Governmental Industrial Hygienists (ACGIH), a private not-for-profit, non-governmental corporation open to all industrial hygienists or other occupational health and safety professionals. The authors have the opinion that there are misunderstandings about the use of regulated health and safety standards.
In part one of this article, they provide some information on how regulations are formed and advice on using these values to conduct business. Employers and employees need this fundamental understanding to make informed health and safety decisions. This information is also useful for guiding public decisions about everyday toxic exposures.
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.
Understand Heat-Transfer-Fluid Maximum Temperature Rating
Manufacturers of heat transfer fluids assign a maximum temperature rating to each fluid. This rating must be considered to ensure the safe and efficient operation of the fluid. This paper explains the basis of the rating, how fluids degrade, and how the temperature profile in a heat transfer system affects fluid performance and life.
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.
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.
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.
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.
Security Vulnerability Analysis
Plant security is a key priority at many plants. This 10-page paper provides background what the methodology for a plant vulnerability analysis involves. It covers topics such as how to get started, available tools, and risk assessment.
Risk-Based Process Safety Design
Safe design has long been a priority in the process industries. A safe design basis, together with a formal safety management system and safety practices, procedures, and training, is critical for providing that level of confidence required for risk management. The goal of process safety management is to consistently reduce risk to a level that can be tolerated by all concerned. A systematic, risk-based approach to safety design can help eliminate hazards that pose intolerable risk from the process and mitigate the potential consequences of hazards.
RFID in Manufacturing
In the wake of a Wal-Mart mandate requiring top suppliers to put Radio Frequency Indentification (RFID) tags on cases and pallets of consumer goods by January 2005, Rockwell Automation offers this white paper to help educate manufacturers on how to maximize their investment in RFID technology throughout their enterprise and supply chains. The paper provides a practical guide to extracting measurable value from RFID implementations in plant and warehousing operations.
Relief Design for Reactive Systems Get the Facts
This 15-page paper focuses on the additional degrees of complexity that reactive systems pose for emergency relief systems. It covers topics such as how to screen for reactivity and what practices, standards and regulations should be followed, as well as a host of other issues.
Push Maintenance: The New Frontier in Asset Management
The convergence of innovative technologies using open industry standards simplifies communication between software and technology. Now you can centralize key performance diagnostics, push critical information to the workforce, and problems can be solved from anywhere.