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Author Profile
Joel Don
345 Results Found
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FeatureAutoQuiz: What Is the Process for a Continuity Check of a Field Transmitter?
A continuity check is performed on a length of finished wire or cable to determine if the electrical current flows continuously throughout the length. -
FeatureAutoQuiz: How to Measure and Compensate for Disturbances to Prevent Set Point Deviance
The objective of feedforward control is to measure disturbances and compensate for them before the controlled variable deviates from set point. -
FeatureAutoQuiz: What Is the Dead Band of an Instrument?
The dead band is the range through which an input signal may vary, upon reversal of direction, without initiating an observable change in output signal. -
NewsBook Excerpt + Author Q&A: Detecting Leaks in Pipelines
Successful leak detection depends on a productive confluence of several situationally dependent technologies. -
FeatureAutoQuiz: How to Simultaneously Optimize an Interacting Dead-Time Dominant Process with Multiple Constraints
Model predictive control excels at dead-time dominance and simultaneous optimization while accounting for future prediction of proximity to constraints. -
FeatureAutoQuiz: What are the Closure Members in Globe and Butterfly Valves?
A butterfly valve has a circular body and a rotary-motion disk-closure member. The physical blocking mechanism in a globe valve is a plug. -
FeatureAutoQuiz: How Do You Assess Peak Performance for an Operating Unit?
Cost sheets show the best periods of operation, and data historians explain the conditions and relationships. -
FeatureAutoQuiz: How to Define the Flow Characteristic for a Valve
A linear flow characteristic is when flow capacity or (Cv) increases linearly with valve travel. Flow is directly proportional to valve travel. -
FeatureAutoQuiz: How to Detect a Fault in a Safety System
A proof test on a system may reveal faults that would otherwise not be mentioned by internal diagnostic measures and is therefore correct. -
FeatureAutoQuiz: How to Calculate the Output Signal Value of a Pneumatic Transmitter
There is a straightforward linear relationship between the units of pounds per square inch (psi) and degrees F (Fahrenheit). -
FeatureAutoQuiz: What is the Cause of a High Process Variability?
An oversized control valve will operate next to the seat where the friction and stick slip is greatest. -
FeatureAutoQuiz: How to Calculate Temperature for an Electronic Transmitter
There is a straightforward linear relationship between the units of milliamps and degrees. -
FeatureAutoQuiz: What is the Operating Principle of an AC Motor?
An AC motor consists of a rotor (rotating portion) with a laminated iron core containing copper bars in the slots. -
FeatureAutoQuiz: What is a Thermowell?
A thermowell is a closed-end tube that surrounds the measuring junction of a thermocouple. -
News
Book Excerpt + Author Q&A: Measurement Uncertainty
The new, expanded fifth edition of ISA's book on measurement uncertainty presents a variety of uncertainty experiments as well as several new appendices. -
FeatureAutoQuiz: How to Calculate Dead Time from Transportation Delay for Thickness Control
The time it takes the sheet to go from the diebolt actuators to the thickness gauge that transverses the sheet is the transportation delay -
FeatureISA Training and Education: First Quarter 2017
The first half of 2017 saw ISA offer many different training and education programs. -
FeatureAutoQuiz: What is the Purpose of a Breadboard in Electronics Applications?
A breadboard is a construction base for prototyping of electronics. -
FeatureAutoQuiz: What Device Is Used to Change an Analog Signal to a Digital Signal?
An analog-to-digital converter is a function that converts an analog signal (current, voltage, or electric charge) into digital data (usually binary) -
FeatureAutoQuiz: How Do You Compensate for Thermowell Lag Time?
Thermowell and temperature processes have multiple interacting thermal lags.