As defined previously, calibration means the comparison and adjustment…
Like so many other industrial data networks, FOUNDATION Fieldbus is an…
A much simpler alternative to continuous vibration sensors…
Most people reading this book have likely had the experience of…
Modern DC and AC motor drives provide features useful when using…
Shown here is a partial listing of principles applied in the subject…
A very helpful method for understanding the operation of proportional,…
“Polyphase” means “many phases,” describing a…
An important performance parameter for transmitter instruments is…
The transformer is one of the most important components in all of AC…
All substances are comprised of various elements in various…
Coy, John J. et. al. (December 2012) Sampled graphic illustrations…
Measuring the flow rate of liquid through an open channel is not…
Much of our knowledge about atomic structure comes from experimental…
This section does not describe a particular type of flowmeter, but…
Electromechanical relays may be connected together to perform logic…
Take for instance the problem of measuring fluid flow through a pipe.…
Any physical location in an industrial facility harboring the…
A variety of technologies exist to measure the quantity of stored…
As defined previously, calibration means the comparison and adjustment…
In a manually-controlled process, a human operator directly actuates…
One very convenient feature of waves is that their properties are…
In order for any PID controller to be practical, it must be able to do…
Converting between disparate units of measurement is the bane of many…
Sometimes we encounter a diversity of instrument signal standards in…
A 4 to 20 mA current signal represents some signal along a 0 to 100…
Every programmable logic controller must have some means of receiving…
One of the most important accessories for any temperature-sensing…
Process analyzers measure the concentration of specific substances for…
Imagine a liquid-level control system for a vessel, where the position…
A limitation inherent to pneumatic valve actuators is the amount of…
Some analyzers measure the composition of a process stream by directly…
Disturbances in the liquid tend to complicate liquid level…
Current is the name we give to the motion of electric charges from a…
A temperature switch is one detecting the temperature of some…
Three-phase AC is the dominant mode of electric power generation and…
These fortifications focus on human behavior rather than system design…
At the root of successful system diagnosis is a rigorous adherence to…
An important type of “accessory” relay, especially for…
