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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Engineering Standards

IEC 60079-14 Explained: Complete Guide to Hazardous Area Installation for Instrumentation and Control Systems

Table of ContentsWhat is IEC 60079-14 and Why it is Critical For Hazardous Area...
Checklist

Impulse Line Inspection Step By Step Procedure For DP Transmitters

Table of ContentsWhat Is Impulse Line Inspection and Why It Is Critical for DP...
Engineering

Understanding Rangeability vs Turndown Ratio in Control Valve Sizing

Table of ContentsWhy This Distinction Matters for Instrumentation EngineersDefinitions: Rangeability vs Turndown Ratio in...
Instrumentation Calculators

Pressure Unit Converter – ISO and NIST Compliant Professional Calculator for Engineers

Instrumentation Questions

Troubleshooting Analog Output Signals in PLC Loops – Advanced Scenario-Based Quiz for Process Industries

Why Mastering PLC AO Signal Troubleshooting Matters in Process Plants Learn how to fix PLC...
Instrumentation

Edge AI Based Predictive Instrumentation Calibration and Health Monitoring for Process Plants

Table of ContentsWhy Edge AI Based Predictive Calibration Is the Latest Trend in Instrumentation...
Communication

Duplicate Modbus Address in Temperature Multiplexers Causes Plant Shutdown – Real Incident & Root Cause

Table of ContentsIncident Summary: 36 Temperature Tags Dropped to Zero and Alarm FloodingTimeline &...
Instrumentation Calculators

MIMO Decoupling Matrix Designer for Multivariable Process Control

MIMO Decoupling Matrix Designer /* =========================== DECORATED MIMO CALCULATOR WordPress Responsive...
Instrumentation

Live Signal Verification 4 to 20 mA Loop Standard Operating Procedure (SOP)

Table of ContentsPurpose: Live Signal Verification for 4-20 mA LoopsScope: Systems, Transmitters and ExclusionsSafety...
Instrumentation Questions

Advanced SIS Troubleshooting Quiz for Process Industries (25 MCQs with Answers)

SIS Troubleshooting Quiz Questions and Answers This quiz is for experienced safety, instrumentation, and SIS...
PLC

PLC Alarm and Trip Documentation Procedure – EPC PLC Automation Engineer Guide

Table of ContentsPLC Alarm and Trip Documentation Purpose and Objectives of the ProcedureScope and Explicit...
PLC

Resolution in PLCs – The Complete Guide for Automation & Instrumentation Engineers

Table of ContentsWhy Resolution in PLCs Matters in Industrial AutomationWhat Is Resolution in PLCs?...
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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...