Sivaranjith – Instrumentation and Control Engineering

Instrumentation Engineer

What is a smart transmitter?

On March 12, 2020 by Sivaranjith

What is a smart transmitter? A microprocessor-based smart transmitter has a memory that can perform calculations, produce diagnostics and out-perform older, more conventional transmitters when it comes to accuracy and stability. A Smart Transmitter will also have a wireless communication protocol which…

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51 PLC interview questions

On March 12, 2020 by Sivaranjith

1. What is PLC? Programmable logic controllers, also called programmable controllers or PLCs, are solid-state members of the computer family, using integrated circuits instead of electromechanical devices to implement control functions. They are capable of storing instructions, such as sequencing, timing, counting,…

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What is sensor trim in a smart transmitter?

On March 6, 2020 by Sivaranjith

In a conventional analog electronic process transmitter typically have only two calibration adjustments: one for zero and another for span, modern transmitter offers more components in need of adjustment. Smart transmitter: The aim of the analog-to-digital converter (ADC) is to transform the…

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Pneumatic vs Electrical actuators

On March 4, 2020 by Sivaranjith

The main difference between pneumatic and mechanical actuators is their working speed. The two systems are so distinct, that one can not replace the other with a drop-in. Each one has its own intrinsic benefits and disadvantages: Advantages of Pneumatic actuators: The…

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PLC learning series 16: PLC Documentation

On March 2, 2020 by Sivaranjith

Documentation is the process of orderly collection and record of data about machines or process and about both hardware and software components of its control system. Such documents are a helpful guide in the design, implementation, deployment, testing, and maintenance of applications….

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How to select an actuator for valve?

On December 27, 2019 by Sivaranjith

The actuator is an essential part of the control valve, which drives the control valve stem. In order to select an appropriate control valve, an engineer should know about the varieties in valve actuators and its specifications. The actuator for a valve…

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How to do Megger test/insulation resistance for transformer?

On December 21, 2019 by Sivaranjith

Transformers are one of the costliest equipment used in distribution and transmission process of power. The transformer has to go through different testing procedures periodically to prove that the transformer works properly. Deterioration of the transformer insulation resistance is one of the most common…

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What are the different types of NDT tests?

On December 18, 2019 by Sivaranjith

NDT test is a method to find the possibility of defects and the characteristics of a material that might cause aircraft to experience interference, reactor failure, train derailments, burst pipes, and various other events. NDT is used to ensure the quality of materials…

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PLC Learning series 15: Applications – Level measurement

On December 17, 2019 by Sivaranjith

Consider a simple application of water tank level measurement application using sensors. We put one near the bottom and one near the top, as shown in the picture below: The final element is configured to be a highly reliable valve and to retain…

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What is HIPPS?

On December 16, 2019 by Sivaranjith

HIPPS: HIPPS is part of the Safety Instrumented System (SIS) to avoid overpressure by shutting off the source and collecting the pressure on the system’s upstream side. Instruments provide the security function in HIPPS. The Safety Loop is made up of one or…

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