instrumentation and control

How to Connect a DP (Differential Pressure) Flow Sensor to a DP Transmitter

The DP Transmitter should be mounted with a manifold block as illustrated in the figure 1(a) below to allow for…

4 years ago

Instrumentation Sensors and Transducers – Multiple Choice Questions & Answers (MCQ4)

The Answers have been provided at the end of the Questions: Q1. Which of the following sensors is used to…

4 years ago

How Signal Processing Circuits are protected from high currents & voltages

Protection against high currents and voltages is a very important requirement for signal processing circuits. A high current can be…

4 years ago

How to Tune the PID Controller

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

4 years ago

Methods of Protecting Instruments from Explosive Atmospheres

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

4 years ago

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

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

4 years ago

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

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

4 years ago

What is a Smart Sensor?

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

4 years ago

P&IDs and Loop Diagrams

Process and Instrument Diagrams (P&IDs), also called Piping and Instrumentation Diagrams and Loop diagrams are construction and documentation drawings that…

4 years ago

Feedforward Control

Feedforward control is based on principle of pre-emptive load counter-action i.e. if all major loads (i.e. disturbances) on a process…

4 years ago