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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Instrumentation Questions

Burner Control System Components – Advanced Quiz for Instrumentation Engineers

Introduction to Burner Control Systems Why Burner Management Systems (BMS) Matter in Process Industries In environments...
Control System

PLC vs DCS – Which One Should you Choose for your Automation System?

Table of ContentsWhat is a PLC (Programmable Logic Controller)?What is a DCS (Distributed Control...
Instrumentation Calculators

Thermowell U-Length Calculator | ASME PTC 19.3 TW-2016 Tool

Table of ContentsUse Our Free Thermowell U-Length CalculatorWhat is a Thermowell and Why It...
DCS

Understanding the Difference Between DCS Components: ES, OS, and AS

Table of ContentsWhat are the Main Components of a Distributed Control System (DCS)?Engineering Station...
Control Valve

Field Troubleshooting Guide: Control Valve Not Responding in Process Area

Table of ContentsControl Valve Not Responding - Troubleshooting FlowchartSafety First – Isolation and Preparation...
Control System

Why the Cable Shield is Grounded Only at the PLC or Control Panel Side

Table of ContentsUnderstanding Cable Shielding in Instrumentation and Control Systems1. Avoiding Ground Loops: Why...
Control Valve

What is Partial Stroke Test (PST)? A Complete Guide for Shutdown and Control Valves

Table of ContentsWhy Partial Stroke Testing is ImportantWhat is a Partial Stroke Test?Full Stroke...
SIS/ESD

Testing and Repair Deferral – IEC Guidelines, Procedure, and Best Practices

Table of ContentsIntroduction to SIS Testing and Repair DeferralWhat Is SIS Proof Testing?Why SIS...
Instrumentation Questions

Instrumentation Design Deliverables Quiz – 25 Advanced MCQs for Engineers

Welcome, engineers and designers! In the intricate world of process industries like oil &...
Instrumentation Calculators

RTD Callendar–Van Dusen Calculator | Accurate PT100, PT500, and PT1000 Conversion

Table of ContentsEmbedded Interactive CalculatorWhat is the Callendar–Van Dusen Equation?Understanding Different RTD TypesHow the...
Engineering

How to Select the Right Temperature Transmitter: A Practical Guide for Industrial Applications

Table of ContentsWhat is a Temperature Transmitter?Advantages of Using Temperature TransmittersTypes of Temperature Transmitters...
Instrumentation Questions

Advanced Control Valve Hunting Troubleshooting Quiz – Test Your Control Loop Expertise

Why Control Valve Hunting Important The Importance of Control Valve Hunting One of the most...
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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...