HomeAuthorsPosts by Sundareswaran Iyalunaidu

Sundareswaran Iyalunaidu

With over 24 years of dedicated experience, I am a seasoned professional specializing in the commissioning, maintenance, and installation of Electrical, Instrumentation and Control systems. My expertise extends across a spectrum of industries, including Power stations, Oil and Gas, Aluminium, Utilities, Steel and Continuous process industries. Tweet me @sundareshinfohe
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Control Valve

Control Valve Passing Even When Fully Closed: Causes, Symptoms, Troubleshooting and Solutions

Table of ContentsUnderstanding Control Valve Passing and Why It HappensWhat Does It Mean When a Control Valve Is Passing?How a Control Valve Should Close Under Normal ConditionsCommon Symptoms of a Passing Control ValveMajor Causes of Control Valve PassingControl Valve Shutoff Performance by Valve TypeHow...
Instrumentation Calculators

Instrument Range Calculator | Calculate Span, Rangeability, Turndown Ratio & Calibration Range

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Commissioning

Loop Check vs Functional Test in Instrumentation Commissioning

Table of ContentsWhy the Difference Between Loop Check and Functional Test MattersWhat is Loop...
Instrumentation Calculators

Mean Time To Detect (MTTD) Calculator for Process Instrumentation Fault Discovery

Table of ContentsWhy MTTD Calculation is Important in the Process IndustryWhat is MTTD (Mean...
Instrumentation Questions

Advanced Quiz on Intrinsic Safety Instrumentation Circuits in Oil & Gas Process Industries

Introduction: Advanced Quiz on Intrinsic Safety Instrumentation Circuits In process sectors where explosive atmospheres are...
Instrumentation Calculators

Gas Flow Unit Conversion Calculator: Standard Cubic Feet per Hour (SCFH) to Standard Cubic Feet per Minute (SCFM)

This SCFH to SCFM Conversion Calculator is a quick and easy way to change...
PLC

Which PLC is Mostly used in the Automation Industry?

Table of ContentsWhy PLCs Still Dominate the Automation WorldMost Popular PLCs in the Automation...
Engineering Standards

S84 / IEC 61511 Standard for Safety Instrumented Systems – Complete Guide

Table of ContentsIntroduction to S84 / IEC 61511What is S84 / IEC 61511 Standard?Key...
Instrumentation Calculators

Free Online PT2000 RTD Calculator – Resistance to Temperature Conversion

A Resistance Temperature Detector (RTD) is a precision sensor that changes electrical resistance with...
Engineering

Interface Level Measurement Selection Procedure – Complete 2025 Guide for Process Engineers

Table of ContentsWhat is a Liquid Interface?Understanding Emulsions (Rag Layers)Step-by-Step Interface Level Measurement Selection...
Instrumentation Questions

Advanced Control Valve Troubleshooting Quiz for Process Control Engineers

Introduction: Advanced Control Valve Troubleshooting Quiz  Troubleshooting control valves is very important for keeping processes...
Communication

Best Practices for Configuring HART Parameters in DCS Software

Table of ContentsChoose the Right Device Drivers (DD/EDD Files)Set Up the Communication ChannelsManage the...
SIS/ESD

Functional Safety Terminology – Excel Download for Industrial Automation

Table of ContentsWhat is Functional Safety?Key Functional Safety Terms and ConceptsDownload: Functional Safety Terminology...
Engineering

Cable Gland Selection for Hazardous Area Installations – Complete 2025 Guide

Table of ContentsWhat Is a Cable Gland?Why Cable Gland Selection Is Critical in Hazardous...
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Latest articles

Control Valve

Control Valve Passing Even When Fully Closed: Causes, Symptoms, Troubleshooting and Solutions

Table of ContentsUnderstanding Control Valve Passing and Why It HappensWhat Does It Mean When...
Instrumentation Calculators

Instrument Range Calculator | Calculate Span, Rangeability, Turndown Ratio & Calibration Range

<!-- Google Fonts (safe to keep as a inside a WordPress "Custom HTML"...
Communication

Profibus PA Communication Problems: Causes, Symptoms and Troubleshooting Guide

Table of ContentsOverview of Profibus PA Communication Challenges What is Profibus PA Communication?Definition of Profibus...
Engineering

FAT vs SAT vs SIT: Three Critical Tests That Determine Whether Your Plant Is Truly Ready for Startup

Table of ContentsIntroductionPurpose of Factory Acceptance TestingFactory Acceptance Test ObjectivesFactory Acceptance Test ObjectivesPLC FAT...