Latest CAD and Digital Simulation Education

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Derivative (Rate) Control

Textbook

The final element of PID control is the “D” term, which…

Pressure Switches

Textbook

A pressure switch is one detecting the presence of fluid pressure.…

Integral (Reset) Control

Textbook

Imagine a liquid-level control system for a vessel, where the position…

Understanding How Three-phase Electric Motors Work

Textbook

The key to understanding how three-phase electric motors work is to…

Loop Diagrams (Loop Sheets)

Textbook

Finally, we arrive at the loop diagram (sometimes called a loop sheet)…

Policy-based Fortifications

Textbook

These fortifications focus on human behavior rather than system design…

Transfer Function Analysis

Textbook

An extremely important topic in engineering is that of transfer…

Formulae for Common Chemical Compounds

Textbook

Most of these formulae appear in molecular chemical form rather than…

On/off Shut-off Valves

Textbook

An on/off valve is the fluid equivalent of an electrical switch: a…

Differential Pressure Transmitters

Textbook

One of the most common, and most useful, pressure measuring…

Electrical Resistance and Ohm’s Law

Textbook

To review, voltage is the measure of potential energy available to…

Electrical Sources and Electronic Load

Textbook

By definition, a source is a device delivering energy into a system,…

The HART Digital/Analog Hybrid Standard

Textbook

A technological advance introduced in the late 1980’s was HART,…

Techniques for Analyzing Control Strategies

Textbook

Control strategies such as cascade, ratio, feedforward, and those…

Circuit Failure Analysis

Textbook

Perhaps the most valuable skill an instrument technician can possess…

Pilot Valves and Pneumatic Amplifying Relays

Textbook

Self-balancing mechanisms consisting solely of a baffle/nozzle…

Transformer Basics and Principles of Operation

Textbook

The transformer is one of the most important components in all of AC…

National Institute of Standards and Technology (NIST) Traceability

Textbook

As defined previously, calibration means the comparison and adjustment…

ANSI/IEEE Function Number Codes

Textbook

In the United States, the ANSI and IEEE organizations have…

Continuous Float Level Transmitters

Textbook

Perhaps the simplest form of solid or liquid level measurement is with…