The purpose of a control valve actuator is to provide the motive force…
Those familiar with industrial instrumentation will find much within…
A unique form of technical diagram for describing the abstract…
An electric motor is often used as a discrete control element in a…
Another category of control strategies involves the use of signal…
(Will be addressed in future versions of this book)
Creative Commons Attribution 4.0 International Public License By…
One of the great benefits of digital technology is the ability to…
Multiple accessories exist for pressure-sensing devices to function…
Modern DC and AC motor drives provide features useful when using…
Developed by the Modicon company (the original manufacturer of the…
Data-processing modules within FF systems are known as function…
(Will be addressed in future versions of this book)
Perhaps the most confusing aspect of discrete sensors is the…
As discussed at the beginning of this chapter, instrumentation safety…
One of the most important accessories for any temperature-sensing…
While the term “probability” may evoke images of…
In the United States, the most common language used to program PLCs is…
A technological advance introduced in the late 1980’s was HART,…
A simple control system drawn in block diagram form looks like this:…
As we have seen, feedforward control is a way to improve the stability…
A fundamental principle in instrumentation system troubleshooting is…
There are multiple motives for compromising the security of an…
Some problem-solving techniques are unique to quantitative problems,…
A fluid is any substance having the ability to flow: to freely change…
Light is known to interact with matter in very specific ways, which…
One of the great benefits of digital technology is the ability to…
Weight-based level instruments sense process level in a vessel by…
Sometimes we encounter a diversity of instrument signal standards in…
It is possible to convey electrical power and communicate analog…
It is often useful to express the amplitude of an alternating quantity…
Programmable logic controllers are essentially nothing more than…
At the root of successful system diagnosis is a rigorous adherence to…
In a manually-controlled process, a human operator directly actuates…
In the United States, the most common language used to program PLCs is…
Those familiar with industrial instrumentation will find much within…
pH is the measurement of the hydrogen ion activity in a liquid…
While the term “probability” may evoke images of…
(Will be addressed in future versions of this book)
Any conductor possesses a characteristic called inductance: the…
The three “elementary” particles of matter comprising all…
I remember first learning about the world-wide Internet, and wondering…
(Will be addressed in future versions of this book)
A simple control system drawn in block diagram form looks like this:…
Three-phase AC is the dominant mode of electric power generation and…
Several different technologies exist for the conversion of fluid…
In some process applications, it is important that the control valve…
This section does not describe a particular type of flowmeter, but…
There is much to be said for neatness of assembly in electrical signal…
The Law of Continuity for fluids states that the product of mass…
Suppose we wished to measure the consumption of propane over time for…
Instrument technicians should not have to concern themselves over the…
All masses require force to accelerate (we can also think of this in…
A unique form of technical diagram for describing the abstract…
A fluid is any substance having the ability to flow: to freely change…
A control strategy similar to ratio control is relation control. This…
Much has been written about the benefits of robust PID control.…
(Will be addressed in future versions of this book)
The vast majority of PID controllers in service today are digital in…
