industrial-applications-thermal-mass-flowmeters

The Good, Bad and Ugly of Thermal Mass Flowmeters

Thermal mass flowmeters can be a relatively inexpensive flowmeter that can handle extremely small flows (e.g., inline 1/16-inch meters) and large flows (e.g., multipoint insertion type in 60 inch ducts). Thermal flowmeters introduce heat into the flow stream and measure how much heat is absorbed using one or more temperature sensors. However, the meter requires […]

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AutoQuiz-20160826-data-sheets

AutoQuiz: What Is the Value of Data Sheets for Instrumentation?

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 is from the Level III […]

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Tracy-Widom-distribution-based-fault-detection-approach-application-to-f16-aircraft-sensor-actuator-fault-detection

Tracy-Widom Approach to F-16 Aircraft Sensor-Actuator Fault Detection

Abstract: The fault detection approach based on the Tracy-Widom distribution is presented and applied to the aircraft flight control system. An operative method of testing the innovation covariance of the Kalman filter is proposed. The maximal eigenvalue of the random Wishart matrix is used as the monitoring statistic, and the testing problem is reduced to determine […]

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ISA-industrial-training-education-sept-oct-2016

ISA Technical Education and Training for September and October

In September, drill down on process control with ISA’s Process Automation Boot Camp. Designed for non-maintenance personnel with little or no background in process measurements and control, this hands-on course focuses on the physical measurement technologies, the communication signals, and various applications of instrument equipment to achieve common process measurements and control. An exciting mix […]

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AutoQuiz-20160819-measuring-level-liquid-dielectric-constant

AutoQuiz: How to Measure the Level of a Liquid with a Dielectric Constant

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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low-flow-cut-off-calibration-table-graph

How Does Low Flow Affect Differential Pressure Flowmeter Calibration?

For flowmeter calibration, the phenomenon of “low flow cut-off” is only associated with differential pressure transmitters with square root extraction — if the square root (flow) calculation is done in the control system (DCS/PLC), then this test approach does not apply. The graphic below illustrates the issue. Some may ask why we are testing the […]

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The Decision to Volunteer: The Why, How, and a Personal Call to Action

In their book, The Decision to Volunteer: Why People Give Their Time and How You Can Engage Them, Beth Gazley and Monica Dignam used research on associations to better understand why members volunteer for professional societies such as ISA.  Their research indicated that volunteers contribute their time for both altruistic (other-serving) and instrumental (self-serving) reasons.  […]

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AutoQuiz-20160812-mandatory-standards-industrial-automation

AutoQuiz: What Is a Mandatory Standard in Industrial Automation?

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 is from the Level III […]

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event-triggered-control-design-of-linear-networked-systems-with-quantizations

Event-Triggered Control Design of Linear Networked Systems with Quantizations

Abstract: This paper is concerned with the control design problem of event-triggered networked systems with both state and control input quantizations. Firstly, an innovative delay system model is proposed that describes the network conditions, state and control input quantizations, and event-triggering mechanism in a unified framework. Secondly, based on this model, the criteria for the asymptotical […]

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PID Tuning for Near and True Integrating Processes

The most important loops on vessels and columns typically have a near or true integrating response. A self-regulating process is classified as near integrating if the process time constant is larger than four times the process dead time. The composition, pH, and temperature response of continuous columns tend to have a time constant to dead […]

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