Multiple accessories exist for pressure-sensing devices to function optimally in challenging process…
Textbook
Valve actuators provide force to move control valve trim. For precise positioning of a control valve, there…
Textbook
A pneumatic controller receives a process variable (PV) signal as a variable air pressure, compares that…
Textbook
A different strategy for controlling the flow of fluid is to insert a rotary element into the flow path.…
Textbook
Some problem-solving techniques are unique to quantitative problems, involving mathematical calculations. In…
Textbook
Most pneumatic instruments use a simple but highly sensitive mechanism for converting mechanical motion into…
Textbook
Valves can experience a number of problems, most of them either preventable or repairable. These problems can…
Textbook
Finally, we arrive at the loop diagram (sometimes called a loop sheet) for the compressor surge control system…
Textbook
An on/off valve is the fluid equivalent of an electrical switch: a device that either allows unimpeded flow or…
Textbook
Control valves are supposed to deliver reliable, repeatable control of process fluid flow rate over a wide…
Textbook
Given the ability of pressurized fluids to transmit force over long distances, it is not surprising that many…
Textbook
Abdelaziz, Ahmed (June 2014) Identified numerous typographical errors throughout the book, mostly repeated…
Textbook
Regardless of valve type, all stem-actuated control valves require some form of seal allowing motion of the…
Textbook
The reason why a pneumatic control valve’s stem position corresponds linearly to the amount of air…
Textbook
A Safety Instrumented Function, or SIF, is one or more components designed to execute a specific…
Textbook
To better understand the design and operation of self-balancing pneumatic mechanisms, it is helpful to examine…
Textbook
When control valves operate between fully open and fully shut, they serve much the same purpose in process…
Textbook
A damper (otherwise known as a louvre) is a multi-element flow control device generally used to throttle large…
Textbook
Self-balancing mechanisms consisting solely of a baffle/nozzle detector coupled to a feedback bellows, while…
Textbook
A great many precision instruments use the principle of balance to measure some quantity. Perhaps the simplest…
Textbook
A sliding-stem valve body is one where the moving parts slide with a linear motion. Some examples of…
Textbook
A pneumatic controller receives a process variable (PV) signal as a variable air pressure, compares that…
Textbook
Learning how to tune PID controllers is a skill born of much practice. Regardless of how thoroughly you may…
Textbook
Weight-based level instruments sense process level in a vessel by directly measuring the weight of the vessel.…
Textbook
Fieldbus devices require far more attention in their initial setup and commissioning than their analog…
Textbook
Some of the simplest types of digital communication networks found in industry are defined by the EIA…
Textbook
A proximity switch is one detecting the proximity (closeness) of some object. By definition, these switches…
Textbook
The digital multimeter (DMM) is quite possibly the most useful tool in the instrument technician’s…
Textbook
Suppose we wished to measure the rate of propane gas flow through a hose to a torch: Flowmeters appropriate…
Textbook
Textbook
The following animation shows how a radio-energy pulse travels down and then up the waveguide of a guided-wave…
Textbook
In the United States, the most common language used to program PLCs is Ladder Diagram (LD), also known as…
Textbook
An interesting parallel to the “unity fraction” unit conversion technique is something referred to…
Textbook
Modern DC and AC motor drives provide features useful when using electric motors as final control elements.…
Textbook
As previously defined, calibration refers to the checking and adjustment of an instrument so that its output…
Textbook
Capacitance Any two electrical conductors separated by an insulating medium possess the characteristic called…
Textbook
A temperature switch is one detecting the temperature of some substance. Temperature switches often use…
Textbook
The vast majority of modern process transmitters (both analog and digital) come equipped with a feature known…
Textbook
Recall that an exothermic chemical reaction is one that releases a net sum of energy, as opposed to an…
Textbook
The efficient identification and correction of instrument calibration errors is an important function for…
Textbook
An exciting development in industrial instrumentation is the WirelessHART radio communication standard,…
Textbook
Facebook
Google
GitHub
Linkedin