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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Instrumentation Calculators

Advanced Instrument Air Compressor Interlock Logic and Control Quiz for Automation and Instrumentation Professionals

Instrument Air Compressor Interlock Logic Quiz Introduction Instrument air compressors are critical utility equipment controlled through PLC based sequencing, pressure instrumentation, permissives, alarms, trips and automatic standby selection. For automation and instrumentation professionals, understanding this logic is essential for DCS configuration, PLC programming, control panel...
Procedures

Galvanic Isolator Troubleshooting Procedure in an Analog Input Loop

Table of ContentsIntroduction to Galvanic Isolator TroubleshootingUnderstanding a Typical 4 to 20 mA Analog Input LoopCommon Symptoms of Galvanic Isolator ProblemsStep by Step Galvanic Isolator Troubleshooting ProcedureIndustrial Troubleshooting Case Study: Incorrect DCS Pressure ReadingSafety Precautions for Galvanic Isolator TroubleshootingGalvanic Isolator Selection and Maintenance Best...
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Flow Measurement

Magnetic Flowmeter vs. Turbine Flowmeter – Complete 2025 Comparison Guide

Table of ContentsOverview: Magnetic Flowmeter (Magmeter) & Turbine FlowmeterMagnetic Flowmeter vs Turbine Flowmeter -...
Instrumentation Tools

Fire Alarm Battery Size Calculator – Professional Tool for Accurate Backup Power Sizing

Table of ContentsWhat is a Fire Alarm Battery?Why Backup Power is Critical in Fire...
Instrumentation Questions

DCS Cascade Control Loop Instrumentation Quiz – 25 Expert-Level Questions

The DCS Cascade Control Loop Instrumentation Quiz is intended for professionals with extensive experience...
PLC

PLC Program for Motor Starter with Low-Level Switch Interlock

Table of ContentsWhy Motor Starters Need ProtectionImportance of Low-Level Interlock in Pump ApplicationsField Layout...
Field Instrumentation

Why 24VDC is Not Always 24VDC – Real-World Troubleshooting for Analog and Digital Signals

Table of ContentsTop 10 Field-Proven Causes Behind 24VDC FailuresCause 1. The Illusion of No-Load...
Checklist

25-Point  Instrumentation Junction Box (JB) Wiring and Termination Checklist for EPC Engineers

Table of ContentsWhat is an Instrumentation JB?25-Point  Instrumentation Junction Box (JB) Wiring and Termination...
Instrumentation Calculators

HVAC Circular Duct Size Calculator – Accurate Airflow and Diameter Sizing Tool

One of the most important things for an HVAC system to work well is...
Instrumentation Questions

Advanced Quiz on Control System Standards (IEC, ISA, ANSI) for Process Industries

Standards for control systems make ensuring that process industries are safe, consistent, and efficient....
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,...
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Instrumentation Calculators

Advanced Instrument Air Compressor Interlock Logic and Control Quiz for Automation and Instrumentation Professionals

Instrument Air Compressor Interlock Logic Quiz Introduction Instrument air compressors are critical utility equipment controlled...
Procedures

Galvanic Isolator Troubleshooting Procedure in an Analog Input Loop

Table of ContentsIntroduction to Galvanic Isolator TroubleshootingUnderstanding a Typical 4 to 20 mA Analog...
Instrumentation Calculators

Pressure Transmitter Overrange Protection Calculator: Calculate Pressure Surge and Overpressure Risk

Table of ContentsWhat Is Pressure Transmitter Overrange Protection?Pressure Transmitter Overrange Protection Calculator ParametersHow to...
Instrumentation Questions

Advanced Instrument Logic Diagram Quiz for Process Control Systems in Process Industries

Instrument Logic Diagram Quiz Introduction An Instrument Logic Diagram displays the interaction of process conditions,...