As we have seen, feedforward control is a way to improve the stability…
The three “elementary” particles of matter comprising all…
Sometimes we encounter a diversity of instrument signal standards in…
A chemical reaction resulting in a net release of energy is called…
Process analyzers measure the concentration of specific substances for…
A great many chemical composition measurements may be made indirectly…
Most of these formulae appear in molecular chemical form rather than…
pH is the measurement of the hydrogen ion activity in a liquid…
Feedback Control System Components Before we begin our discussion on…
A Safety Instrumented Function, or SIF, is one or more components…
The final step in treating wastewater before releasing it into the…
The vast majority of modern process transmitters (both analog and…
A pressure switch is one detecting the presence of fluid pressure.…
Process measurements are often of an analog nature: the temperature of…
A great many precision instruments use the principle of balance to…
As described earlier in this chapter, calibration refers to the…
Impedance in a series circuit is the orthogonal sum of resistance and…
Capacitive level instruments measure electrical capacitance of a…
Those familiar with industrial instrumentation will find much within…
A different strategy for controlling the flow of fluid is to insert a…
Abdelaziz, Ahmed (June 2014) Identified numerous typographical errors…
Some self-powered (4-wire) analog electronic transmitters are designed…
An on/off valve is the fluid equivalent of an electrical switch: a…
Diagnostic ability is arguably the most difficult skill to develop…
Temperature measurement devices may be classified into two broad…
The three “elementary” particles of matter comprising all…
Valve actuators provide force to move control valve trim. For precise…
Some analyzers measure the composition of a process stream by directly…
The following animation shows how a radio-energy pulse travels down…
A very common form of on/off valve used for pneumatic and hydraulic…
Non-dispersive analysis, while newer in discovery than dispersive…
