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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Engineering

Why Control Valve Characteristics Matter in EPC Instrumentation and Control Engineering

Table of ContentsUnderstanding What Valve Characteristics Actually RepresentInherent vs Installed Control Valve CharacteristicsExploring the...
Checklist

Advanced Integrated Field Instrument Reliability & Cyber-Secure Maintenance Checklist for Smart Process Plants

Table of ContentsWhy Instrumentation Maintenance Has TransformedEvolution of Instrumentation Maintenance in Modern PlantsRise of...
Fire & Gas

Types of Flame Detectors and Their Uses in Industrial Fire Prevention (Complete Engineer’s Guide)

Table of ContentsWhat Are Flame Detectors? (Definition, Function & Industry Importance)Why Flame Detectors Are...
SIS/ESD

SIF PFDavg / SIL Verification – Complete Guide + Online Calculator (IEC 61508 / 61511)

Table of ContentsSIF PFDavg / SIL Verification CalculatorWhat is a Safety Instrumented Function (SIF)?Understanding...
Instrumentation Questions

Troubleshooting PLC Digital Output Signals – Advanced Industrial Quiz for Automation Engineers

In process industries, where solenoids, motor starters, interposing relays, and field valves all depend...
Temperature Measurement

Thermocouple Wire vs. Thermocouple Extension Wire: The Complete Guide for Instrumentation Engineers

Table of ContentsWhat Is Thermocouple Wire? (Thermocouple-Grade Wire)Characteristics of Thermocouple WireWhat is Thermocouple Extension...
Commissioning

How to Properly Vent a Pressure or DP Transmitter in Liquid Service

Table of ContentsWhy Proper Venting Is Critical in Liquid ServiceStep-by-Step Procedure for Venting a...
Instrumentation Calculators

Best PID Controller Tuning Simulation Tool for Engineers

PID Tuning...
Communication

HART Transmitter Diagnostics: What Your Field Device is Telling You

Table of ContentsWhy HART Diagnostics are Essential in Process AutomationWhy HART Diagnostics Very ImportantKey...
Instrumentation Questions

Gas Turbine Start Interlocks Quiz – 25 Advanced MCQs for Engineers

Gas turbine start interlocks are essential for safe and reliable turbine operation in both...
Pressure Measurement

Why Siphon Tubes are Essential for Pressure Gauges in High-Temperature Steam Systems

Table of ContentsWhat Is a Siphon Tube in a Pressure Gauge?Why a Siphon Tube...
Temperature Measurement

Testing a Thermocouple With a Multimeter: A Complete Field Guide for Instrumentation Engineers

Table of ContentsWhy Thermocouple Testing Matters in Industrial and Domestic Heating SystemsHow a Thermocouple...
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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...