Basics of Instrumentation - Instrumentation Tools

What are Pre-Shutdown, Shutdown, and Post-Shutdown?

S Bharadwaj ReddyFebruary 22, 2020February 22, 2020

Basically a plant maintenance shutdown is split into three steps, which are as follows: Pre shutdown Shutdown Post shutdown Pre-shutdown: Pre-shutdown is preparation for the shutdown. It is classified into...

Instrument Percent of Span Error

S Bharadwaj ReddyJanuary 20, 2020February 11, 2020

An important part of performing instrument calibration is determining the extent of an instrument’s error. Error is usually measured in percent of span. Instrument Percent of Span Error Calculate the...

Instrument Errors – Zero, Span, Linearity

S Bharadwaj ReddyJanuary 10, 2020January 11, 2020

Suppose an electronic pressure transmitter has an input range of 0 to 100 PSI and an output range of 4 to 20 mA. When subjected to a 5-step up-and-down “As-Found”...

What Every Instrument Engineer Should Know?

S Bharadwaj ReddyOctober 31, 2019February 14, 2020

In the minds of Instrumentation Engineer:- As an instrumentation engineer, there are few things that we need to know to work in our workplace. the major thing being the process...

What is Live Zero in 4-20 mA Current Loop ?

S Bharadwaj ReddyJuly 30, 2019February 8, 2020

The popular myth about 4-20 mA, debunked. A lot of C&I practitioners (including me) has long believed that the establishment of 4 mA as the lower range of the widely...

How to Convert Current to Voltage using Resistor ?

S Bharadwaj ReddyJuly 8, 2019December 17, 2019

In this article, we discuss about How to Convert Current to Voltage using Resistor with different examples like 0-20 mA to 0-10 VDC Conversion, 4-20 mA to 2-10 VDC Conversion,...

Control and Instrumentation Engineer Study Guide

S Bharadwaj ReddyJune 19, 2019March 21, 2020

Are you an Control and Instrumentation Engineer ? Recently joined as a Fresher or Trainee engineer in the Instrumentation department? then this article helps you to get an overall outlook...

Basics of Trips, Interlocks, Permissives & Sequences

S Bharadwaj ReddyMarch 15, 2019February 17, 2020

This post provides information about basics of Trip, Interlock, Permissive and Sequences which are regularly used in instrumentation control systems like ESD, DCS, PLC etc. Trip: The term Trip refers to an action that...

Transmitters 4-20mA Current Failure Alarm Limits

S Bharadwaj ReddyFebruary 25, 2019November 15, 2019

4-20 mA instrumentation and controls usually support a signal range slightly below 4 mA and above 20 mA. For transmitters, current values below 4 mA and above 20 mA are...

Basics of Loop Checks

S Bharadwaj ReddyFebruary 23, 2019March 21, 2019

The term “loop” can refer to the entire “control loop” from primary element (sensor) through the transmitter, and controller, to the valve positioner, and the final control element (valve). The...

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Category : Basics