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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Calibration

Smart Pressure Transmitter Sensor Trim Guide with Diagrams & Calibration Steps

Table of ContentsSmart Pressure Transmitter Signal Flow DiagramWhat is Sensor Trim?Types of Sensor TrimsZero...
Control Valve

How to Troubleshoot a Control Valve Passing Problem after Overhauling: Complete Root Cause Analysis

Table of ContentsCase Summary: Control Valve Passing After OverhaulUnderstanding Control Valve PassingRoot Cause Exploration:...
Engineering Standards

30+ International Standards for Control Systems: The Complete Guide for Automation & Instrumentation Engineer

Table of ContentsProgrammable Controllers and Industrial LogicIndustrial Communication and Data IntegrationFunctional Safety and Risk...
Instrumentation Calculators

Mean Time To Repair (MTTR) Calculator for Process Instrumentation Downtime Analysis

This Mean Time To Repair (MTTR) Calculator is a must-have for instrumentation and maintenance...
Instrumentation Questions

Test Your Knowledge: Instrument Logic Diagram Quiz Based on Real DCS to MCC Logic Diagram

This advanced quiz is for professionals and students who want to learn how to...
Control System

How to Read a DCS Cascade Control Loop Diagram: A Complete Guide with Example

Table of ContentsWhat is a Loop Diagram?What is Cascade Control?Purpose of a DCS Cascade...
PLC

Step-by-Step PLC Ladder Logic for Automatic Liquid Mixing Process with Interlocks

Table of ContentsWhy Liquid Mixing Needs AutomationProcess OverviewPLC I/O Address AssignmentLadder Logic Design (Step-by-Step...
Calibration

Why Calibrating your Calibrators is Critically Important: Accuracy, Compliance and ISO 17025 and NIST Traceability

Table of ContentsRole of Calibrators in Process IndustryWhy Calibrating Calibrators are Important ?Importance of...
Instrumentation Calculators

Free Online PT500 RTD Calculator: Resistance to Temperature Conversion for Instrumentation Professionals

A Resistance Temperature Detector (RTD) is a precision sensor designed to track temperature depending...
Instrumentation Questions

Advanced Quiz on RADAR Level Measurement for Process Instrumentation Engineers

With this advanced 25-question test tailored for instrumentation and automation experts, test your knowledge...
Automation

Understanding Fail-Safe Logic in Industrial Automation Systems

Table of ContentsWhy Fail-Safe Logic Matters in InstrumentationKey Terms used in this Explanation:Example 1:...
Instrumentation

Understanding the Difference Between Live Zero and Dead Zero in 4 to 20 mA Signals

Table of Contents4-20 mA Current Loop: Why It’s StandardWhy not start at 0 mA?What...
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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...