Flowmeter-Primer-Two-Wire-Coriolis-Electromagnetic-Transmitters-Meters

Flowmeter Primer: Two-Wire Coriolis and Electromagnetic Transmitters

Two-wire transmitter technology came about from an agreement among various instrument suppliers in the 1950s to standardize on 4–20 mA current loops as a means of sending a flow, temperature, pressure, or similar process signal back to control and monitoring systems. In the 1980s, HART was added to the 4–20 mA signal, providing additional calibration […]

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PWM-Switching Pattern-Based Diagnosis Scheme for Induction Motor Drives

Abstract: This paper deals with a fault detection technique for insulated-gate bipolar transistors (IGBTs) open-circuit faults in voltage source inverter (VSI)-fed induction motor drives. The novelty of this idea consists in analyzing the pulse-width modulation (PWM) switching signals and the line-to-line voltage levels during the switching times, under both healthy and faulty operating conditions. The proposed […]

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AutoQuiz: What Are Acceptable Hazardous Location Protection Techniques for Industrial Areas?

Today’s automation industry quiz question comes from the ISA Certified Automation Professional certification program. ISA CAP certification provides a non-biased, third-party, objective assessment and confirmation of an automation professional’s skills. The CAP exam is focused on direction, definition, design, development/application, deployment, documentation, and support of systems, software, and equipment used in control systems, manufacturing information […]

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Q&A with Author of New ISA Book: Process Analyzer Systems Project Engineering and Management

Q. Why were you inspired/motivated to write this book? A. There are many books and other resources available on engineering project management. However, there are few available on control systems engineering project management, and none available—that I am aware of—on process analyzer engineering project management. By writing this book, I hope to ease the engineering […]

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How to Link HAZOP and LOPA to Calculate a Safety Instrumented System

Although a hazard and operability (HAZOP) analysis identifies failure events or upsets and the severity of the outcomes by engaging knowledgeable plant personnel, the process typically provides only qualitative information about event frequency and mitigated frequencies. This helps plants make decisions for safety improvement, but does not provide the detailed information necessary for a safety […]

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AutoQuiz: When Does an Instrument Need to Be Recalibrated?

Today’s automation industry quiz question comes from the ISA Certified Control Systems Technician (CCST) program. Certified Control System Technicians calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables. Click this link for information about the CCST program. This question comes from the Level I […]

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Take Advantage of the Opportunities at ISA’s Fall Leaders Meeting

The ISA Fall Leaders Meeting (FLM)—which will get underway later this month in Tampa, Florida—brings ISA leaders together to assess the state of the Society, consider strategies and actions to improve operational results, conduct training sessions for new leaders, plan for leadership succession, celebrate achievements, and promote fellowship. For the seasoned member and/or leader, it […]

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How to Use Life-Cycle Dynamic Simulation to Optimize Process Plant Operations

The oil and gas production explosion is driving the renaissance of the chemical and process industries. With low-cost natural gas comes low-cost feedstock for many chemical compounds, in the form of ethane, propane, and butane, economically boosting the chemical industry. The American Chemistry Council released a report predicting capital investment of $72 billion in more […]

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AutoQuiz: What Is the Standard for Embedded Software for a SIL 3 Certified Safety System?

Today’s automation industry quiz question comes from the ISA Certified Automation Professional certification program. ISA CAP certification provides a non-biased, third-party, objective assessment and confirmation of an automation professional’s skills. The CAP exam is focused on direction, definition, design, development/application, deployment, documentation, and support of systems, software, and equipment used in control systems, manufacturing information […]

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