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

Vortex Flow Meter Troubleshooting – Transmitter Diagnostic Quiz for Engineers

Quiz Scope: Transmitter Faults, Signal Issues and Installation Pitfalls This quiz is for process, instrumentation,...
Engineering

When to Choose Forward and Reverse Acting Control Valves for Design Engineer

Table of ContentsForward Acting Control Valve vs Reverse Acting Control Valve: Selection GuideWhat is...
Engineering

Understanding Zener vs Galvanic Isolation in IS Loops for 4 to 20 mA Systems

Table of ContentsWhat is Zener vs Galvanic Isolation in Intrinsic Safety LoopsWhat is a...
Instrumentation Calculators

Instrument Earthing Resistance Calculator for Process Industries Complete Engineering Guide

Table of ContentsInstrument Earthing and Industrial Grounding SystemsWhat is Instrument Earthing in Process IndustriesOverview...
Calibration

Internal Audit Checklist for ISO Process Instrument Calibration in Process Industries

Table of ContentsISO Instrument Calibration Audits in Process IndustriesWhat is an ISO Instrument Calibration...
Instrumentation Questions

Oxygen Analyzer Basics in Process Industries – Advanced Quiz for Instrumentation Engineers

Why Oxygen Analyzers are Critical in Power Plants and Process Industries Power plants, refineries, and...
Calibration

Calibration Vs Verification: Key Differences, Procedures, Examples and Best Practices In Process Industries

Table of ContentsCalibration vs Verification: a Commonly Confused ConceptWhy Understanding the Difference Between Calibration...
Engineering

Understanding Instrument Earth (IE) in Industrial Automation – Complete Guide for Engineers

Table of ContentsInstrument Earth (IE) and Signal GroundingWhy Instrument Earth Matters in PLC and...
Instrumentation Calculators

Conductivity Liquid Analyzer Probe Resistance Calculator – Complete Guide for Instrumentation Engineers

Table of ContentsConductivity Probe Resistance Calculator for Liquid Analyzers - Instrumentation ToolWhat is Conductivity...
Calibration

Calibration Interval Schedule Procedure for Process Instrumentation Using Risk-Based Method

Table of ContentsCalibration Interval Scheduling in Process IndustriesPurpose of the Calibration Interval Scheduling ProcedureScope...
Instrumentation Questions

Advanced DP Transmitter Calibration Quiz For Instrumentation Engineers And Technicians

Advanced Differential Pressure Transmitter Calibration Quiz Overview For instrumentation engineers, calibration technicians, and EPC professionals...
SIS/ESD

Redundant Transmitters Explained: Reliability, Voting Logic and SIL for Instrumentation Engineers

Table of ContentsWhy Plants Use Multiple Transmitters for the Same Measurement Key Reasons for Using...
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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...