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

Level Transmitter Selection Checklist for EPC Engineers – Step-by-Step Guide

Table of ContentsHow to choose a level transmitter?Step 1: Evaluate the Process MediumStep 2:...
Documentation

PLC System Documentation Guide: Essential Records for Industrial Automation

Table of ContentsWhat is PLC System Documentation?Why is PLC Documentation Important?Key Components of PLC...
P&ID

11 Best P&ID Software Tools for Process Design Engineers in 2025

Table of ContentsBest P&ID Software Tools for Process Engineers in 20251. AutoCAD P&ID (Autodesk)2....
Instrumentation Calculators

Mean Time To Failure (MTTF) Calculator for Instrumentation Reliability Assessment

This Mean Time To Failure (MTTF) Calculator is a powerful tool for instrumentation engineers,...
Instrumentation Questions

Radiometric Level Measurement: 25 MCQs for Engineers & Technicians

This assessment will test your knowledge of radiometric level systems, including how to fix...
Temperature Measurement

Why Install Thermowells at a 45° Angle? Engineering Logic Explained

Table of ContentsWhat is a Thermowell?Why Install a Thermowell at a 45° Angle?Importance of...
PLC

Hot Standby in PLC Systems: Architecture, Working, and Benefits

Table of ContentsWhat is Hot Standby in PLC?Need for Redundancy in PLC SystemsVisualizing Hot...
How to

How to Read a Datasheet of a Temperature Transmitter ?

Table of ContentsPractical Guide using Rosemount 3144P as a Case StudyHow to read the...
Instrumentation Calculators

Online PT1000 RTD Calculator – Convert Resistance (Ω) to Temperature (°C) Instantly

A Resistance Temperature Detector (RTD) is a very accurate temperature sensor that works by...
Instrumentation Questions

Process Instrument Calibration MCQ Challenge – NIST, ISO 17025, ISA Standards & Calculations

In industrial settings, mastering process instrumentation calibration is very important for making sure that...
Calibration

Smart Pressure Transmitter Sensor Trim Guide with Diagrams & Calibration Steps

Table of ContentsSmart Pressure Transmitter Signal Flow DiagramWhat is Sensor Trim?Types of Sensor TrimsZero...
Control Valve

How to Troubleshoot a Control Valve Passing Problem after Overhauling: Complete Root Cause Analysis

Table of ContentsCase Summary: Control Valve Passing After OverhaulUnderstanding Control Valve PassingRoot Cause Exploration:...
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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...
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...