How Servo Motors are used in Process Control

5 years ago

Servo motors are continuous motion mechanisms that use feedback signals to provide position and velocity control in a closed loop…

How to Tune the PID Controller

5 years ago

Before we discuss how to tune the PID controller, let’s look at some basic facts about PID Controller. Basic Facts…

Methods of Protecting Instruments from Explosive Atmospheres

5 years ago

The protection method used in a specific hazardous location depends on the application, the technology available and the specific explosive…

Hazardous Locations Classifications

5 years ago

A hazardous location is defined as a location where fire or explosion hazards exist due to the presence of flammable…

Functional Safety in Instrumentation Systems (SIS, SIF & SIL)

5 years ago

Functional safety is the risk reduction provided by the functions implemented to ensure the safe operations of the process. The…

Alternating Currents and Voltages

5 years ago

Alternating current generator Let’s consider a signal turn coil rotating freely at a constant angular velocity symmetrically between the poles…

4-20 mA Transmitters (2-wire, 3-wire and 4-wire Types)

5 years ago

Background of 4-20 mA Signal Transmission Initially signal transmission was dominated by pneumatics before the advent of 4-20 mA signal…

AC Circuits with Resistors, Inductors and Capacitors

5 years ago

Purely Resistive Circuits In resistive elements the current and voltage are in phase. Figure 1(a) purely resistive circuit Figure 1(b)…

What is a Smart Sensor?

5 years ago

A smart sensor is the integration of a sensor with an analogue to digital converter (ADC), a processor and digital…

Basic Features of Modern PID Controllers

5 years ago

Most modern PID controllers have the following features: Manual versus automatic modeOutput trackingSetpoint trackingAlarm capabilitiesProcess variable (PV) characterization and dampingSetpoint…