What is a smart transmitter?
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...
Author : Sivaranjith
51 PLC interview questions
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...
What is sensor trim in a smart transmitter?
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...
Pneumatic vs Electrical actuators
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...
PLC learning series 16: PLC Documentation
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...
How to select an actuator for valve?
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...
How to do Megger test/insulation resistance for transformer?
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...
What are the different types of NDT tests?
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,...
PLC Learning series 15: Applications – Level measurement
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...
What is HIPPS?
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...