Search Results for: 4-20 mA

HART ( Highway Addressable Remote Transducer) Communication Protocol

3 minutes of reading

What is HART protocol? HART (Highway Addressable Remote Transducer) Protocol is the global standard for sending and receiving digital information across analog wires between smart devices and control or monitoring system. HART is owned by independent non-profit  HART communication foundation. HART is now a global standard because digital information from HART devices can simultaneously communicated with the …

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Distributed Control System (DCS) basics

3 minutes of reading

 Concept of Distributed Control System: DCS refers to a control system usually of a manufacturing system, process or any kind of dynamic system. In DCS controllers are not central in location, but which are distributed throughout the system with each component sub-system controlled by one or more controllers. The entire system is connected by a communication network …

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DIFFERENCE BETWEEN CALIBRATION OF A HART & CONVENTIONAL INSTRUMENT

3 minutes of reading

INTRODUCTION There are smart and conventional instruments and the calibration procedure of these types of instruments are entirely different in this session we are going to discuss about the difference between calibration of a HART &conventional instrument CALIBRATING A CONVENTIONAL INSTRUMENT For a conventional 4-20 mA instrument, a multiple point test that stimulates the input and …

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Instruments Used In Control Loop

3 minutes of reading

Instruments  I hope you have a general understanding what a feedback control loop is, if not please refer the following article – Feedback Control Loop  Sensors You have read  that a sensor monitors and measures what is happening in the process. Examples of sensors include: thermocouples, floats, limit switches, pressure switches, pressure switches, moisture meters, and …

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Basics of Feedback Control – Elements of Feedback control

3 minutes of reading

Feedback Control Feed-back control is gathering information on the controlled variable and comparing it to the set point; making a decision based on that comparison; and taking action to eliminate any differences between the controlled variable and the and the set point In feedback control, there is a constant flow of information in a closed …

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