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This blog covers numerous topics on industrial automation such as operations & management, continuous & batch processing, connectivity, manufacturing & machine control, and Industry 4.0.

The material and information contained on this website is for general information purposes only. ISA blog posts may be authored by ISA staff and guest authors from the automation community. Views and opinions expressed by a guest author are solely their own, and do not necessarily represent those of ISA. Posts made by guest authors have been subject to peer review.

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AutoQuiz: How to Install an Electromagnetic Flowmeter

AutoQuiz is edited by Joel Don, ISA's community manager.

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 study guide, Domain 3, Troubleshooting. Level I represents a professional who has a five-year total of education, training, and/or experience.

One of the most important considerations of the installation of an electromagnetic flowmeter is:

a) the Reynolds Number of the fluid
b) the use of a straightening vane
c) bonding the flowmeter to the piping
d) observing the correct polarity
e) none of the above

The concept of a magnetic flowmeter is that when a conductor (the fluid in the pipe) moves through a magnetic field, a voltage is produced in the conductor that is relative to the speed of the conductor and the magnetic field.

It is imperative for the electric circuit to be complete to be able to measure the voltage, which is proportional to the speed. Knowing and multiplying the speed of the fluid by the cross sectional area of the pipe gives the volumetric flow rate.

If the bond between the meter and the piping is not good, the electricity will not flow and the measurement cannot happen.

The best answer here is "bonding the flowmeter to the piping," answer C.

Image Source: Wikipedia

Joel Don
Joel Don
Joel Don is an independent content marketing, social media and public relations consultant. Prior to his work in marketing and PR, Joel served as an editor for regional newspapers and national magazines throughout the U.S. He earned a master's degree from the Medill School at Northwestern University with a focus on science, engineering and biomedical marketing communications, and a bachelor of science degree from UC San Diego.

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