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Use Signal Characterization in the DCS to Linearize the Installed Flow Characteristic of a Valve

Signal characterization to linearize valve installed flow characteristic has a bad reputation due to some practical implementation problems. These problems can be addressed today by doing the characterization in the distributed control system (DCS), but the stigma remains. With pneumatic positioners, signal characterization was done by the use of a cam. Standard cams were based […]

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Are Smart Devices in a Plant Your Most Valuable Assets?

Think of the usefulness of the diagnostics in your automobile: Few of us know or even care about the hundreds of functions being carried out by a car’s “brain” under the hood.  On-board diagnostic (OBD) systems give the vehicle owner or repair technician access to the status of the various vehicle subsystems. Modern OBD implementations […]

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A Sneak Preview of ISA’s New Website and Enhanced User Experience

The International Society of Automation has been putting the finishing touches on a brand new website, the customer − and member − facing portal that showcases all of ISA’s products, services, and technical information to the world. Behind the new website is a brand new, state-of-the-art association management system, which fulfills a similar purpose to […]

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Cybersecurity – one of the 10 trends impacting the future of ISA

In my column in last month’s issue of ISA Insights, I mentioned five game-changing themes ISA leaders adopted as high-level directional strategic goals for the Society. Those goals originated from a discussion of trends impacting ISA’s future. In many cases ISA staff and volunteers who are subject matter experts (SME’s) in these areas are already […]

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ISA Training and Education Programs for April

Educational events, online courses, webinars and exam preparation offerings for April feature a variety of choices including classes on instrumentation for hazardous environments, burner management, process control valves, MES user requirements, electronic equipment maintenance and tuning control loops. Special programs for April feature the ISA Technician Training Boot Camp and a new, online review course […]

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What are the Benefits of Multiproduct Manufacturing in the Biopharmaceutical Industry?

With the historical success of blockbuster products, the biopharmaceutical industry has required large manufacturing capacity with single-product facilities built to produce large volumes of a single blockbuster drug. More recently, however, with the changing business and regulatory environment, facilities have to be more flexible and capable of producing multiple products. They need to have shorter […]

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How to Use Valve Position Control to Optimize Process Efficiency and Capacity

There are many opportunities for process optimization by valve position control (VPC). Table 1 summarizes common examples of the use of VPC for increasing process efficiency and capacity. Efficiency is increased by reducing energy and raw material costs for a given production rate. Capacity is increased by increasing feed rates for a given efficiency. Table […]

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