Control Room and Field Instruments Questions and Answers
Instrument Engineers Interview Questions, Control Room Interview Questions, Field Instruments Questions and Answers, Instrumentation Questions & Answers.
Control Systems
We have the largest collection of Industrial Control Systems articles like industrial automation, Distributed Control Systems (DCS).
Cascade Control Principle
What is Cascade Control? In single-loop control, the controller’s set point is set by an operator, and its output drives
Sink or Source? Normally Open or Normally Closed?
We discuss concepts of Sink or Source used in electrical circuits or in PLC wiring. Also we deal with basics of normally open contact or normally closed contact.
Difference between Availability, Reliability & SIL
We often come across the above terms, and others, when we are talking about equipment and systems. All of them
Basics of Loop Powered Devices
What are Loop Powered Devices? A lot of loop setups will utilize an external power supply in order to power
Troubleshooting a 4-20mA Current loop
The basic layout of every 4-20mA loop consists of a power supply, a transmitter, and passive loop devices. The supply produces the energy to run loop.
Tips for Reducing the Noise Signals
Many instrumentation systems involve the measurement of analog signals in which noise can be a prominent component. Analog instrumentation signals
PID Controller Gains Effect on Manipulated Variable
Observe the Effect of Proportional Gain Kp, Integral Gain Ki and Derivative Gain Kd values with respect to PID Controller Output
Why Bias used in Proportional Controller ?
The P-Only Algorithm The P-Only controller computes a CO action every loop sample time T as: CO = CObias
Split Range Control Working Principle
Split-range control is used when a single controller is employed to control two final-control elements (two valves for example). In
