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 Calculators

PLC Raw Count Calculator: Comparison with PLC Internal Scaling Blocks, Real-World Use Cases and Practical Benefits

Advanced PLC Raw Count Calculator @import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700;800&display=swap'); :root{ --brand-500: #0b3c5d; --brand-600: #083047; --muted:...
Instrumentation Questions

Gas Turbine Start Interlock & Trip Test Procedure – Advanced Quiz

Why Gas Turbine Startup Interlocks and Trips are Critical Starting up a gas turbine is...
Instrumentation

Beyond Zero: Understanding the Dead Zero Problem in Industrial Analog Signals

Table of ContentsAnalog Signals in Industrial Process ControlUnderstanding Analog Signals in Process InstrumentationCommon Process...
Engineering

Hybrid Level Measurement Selection Procedure for EPC Instrumentation Engineers

Table of ContentsHybrid Level Measurement in EPC ProjectsWhat Is Hybrid Level Measurement in Instrumentation...
Instrumentation Calculators

Coriolis Mass Flow Calculator – Complete Guide for Instrumentation & Process Engineers

Coriolis Mass...
Instrumentation Questions

Refinery Instrumentation Quiz – Advanced Level

This advanced refinery instrumentation quiz is for people who are already experienced in developing,...
Automation

Why Engineers Still Trust the 4-20 mA Signal in Automation Systems

Table of ContentsWhy the 4-20 mA Signal Continues to Dominate Modern PlantsUnderstanding the 4...
Installation Procedure

Grounding and Bonding in Instrumentation and Control Systems

Table of ContentsPractical Guide for Installation, Commissioning and Maintenance Engineers in Process IndustriesWhy Grounding...
Fire & Gas

Method Statement for Addressable Fire Alarm System Installation, Testing and Commissioning as per NFPA 72

Table of ContentsAddressable Fire Alarm Systems in Process IndustriesScope of Work for Addressable Fire...
Instrumentation Calculators

Control Valve Noise Prediction Calculator – IEC 60534 Based Engineering Tool

Table of ContentsControl Valve Noise in Process IndustriesControl Valve Noise Prediction CalculatorWhat Is a...
Instrumentation Questions

Top 25 Essential MCQ for Liquid Analyzer Instrument Technician Interview in Process Industries

This technical quiz is just for instrumentation technicians, commissioning engineers, and maintenance experts that...
Engineering

Essential Checklist for Selecting the Right Solenoid Valve for Your Application

Table of ContentsPractical EPC Engineering Method for Instrumentation Design EngineersWhy Solenoid Valve Selection Is...
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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...