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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Procedures

Hydraulic System Pressure Switch Troubleshooting: Step by Step Safe Procedure

Table of ContentsWhat Is a Hydraulic Pressure Switch and How Does It Work?Hydraulic Pressure Switch Operating PrinciplePressure Switch Hysteresis. Set Point and Reset PointNormally Open and Normally Closed Pressure Switch ContactsHydraulic Pressure Switch vs Pressure TransmitterCommon Hydraulic Pressure Switch Problems and SymptomsPressure Switch Not...
Instrumentation Questions

Advanced PLC Interlock Troubleshooting Quiz for Process Industries | 25 Practical PLC Diagnostics Questions for Instrumentation and Automation Engineers

Why PLC Interlock Troubleshooting Matters in Modern Process Industries  Modern process industries depend on reliable PLC interlock systems to protect personnel, equipment, and production. Troubleshooting PLC interlocks requires strong knowledge of process control, field instrumentation, PLC diagnostics, permissive logic, shutdown sequences, and industrial automation practices....
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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...
Instrumentation Tools

HVAC Fan Static Pressure Calculator – Accurate Airflow Resistance Estimator for Fan Sizing

Table of ContentsWhat is Fan Static Pressure in HVAC?What does the HVAC Fan Static...
Instrumentation Questions

Temperature Transmitter Troubleshooting Quiz – Advanced Diagnostics for Industrial Applications

Introduction to Temperature Transmitter Challenges Get a good look at how to fix temperature transmitters...
Engineering

Difference Between Intrinsically Safe (IS) and Non-IS Cables

Table of ContentsWhat is an Intrinsically Safe (IS) Cable?Why Intrinsically Safe Cables are used...
Engineering

Checklist for Installation of Local Instruments – Complete Guide for EPC, QA/QC and Commissioning Engineers

Table of ContentsWhy use a Local Instrument Installation Checklist?25+ Point Local Instrument Installation Checklist...
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...
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Procedures

Hydraulic System Pressure Switch Troubleshooting: Step by Step Safe Procedure

Table of ContentsWhat Is a Hydraulic Pressure Switch and How Does It Work?Hydraulic Pressure...
Instrumentation Questions

Advanced PLC Interlock Troubleshooting Quiz for Process Industries | 25 Practical PLC Diagnostics Questions for Instrumentation and Automation Engineers

Why PLC Interlock Troubleshooting Matters in Modern Process Industries  Modern process industries depend on reliable...
Instrumentation Calculators

Capacitance Level Sensor Calculator: Calculate Liquid Level and Capacitance for Instrumentation Applications

Capacitance Level Sensor Calculator :root{ --bg:#F2F5F3; --panel:#FFFFFF; ...
SIS/ESD

How are ESD Signals Selected? Complete ESD Signal Selection Guide

Table of ContentsWhat Is an ESD Signal in an Emergency Shutdown System?Why Is ESD...