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 …
Basics of Feedback Control – Elements of Feedback control Read More »
In most processes, there are six basic elements.Process control elements are 1. Controlled variable What you want to control (temperature pressure, level, flow rat, dimensions, position, etc.) 2. Measured variable What you observe in order to determine the actual condition of the controlled variable In most cases, you measure the controlled …
Pneumatic Control System What is pneumatic ? Pneumatic is the technology that makes use of gas or pressurized air. Components of Pneumatic control system 1.Directional control Valves These are functional valves used in logic implementation. Divided according to the number of ports / passages available and number of valve positions 2.Two Way Valves …
PID Loop tuning is one of the important activity carried out by instrumentation or process engineers during plant startup and day to day instrumentation maintenance activities. Several PID loop tuning spread sheets are available in the internet.We are discussing about some of the best PID loop tuning spreadsheet. PID Loop Tuning Spreadsheet by Engineers-Excel .com …
InstaConvert is an android application to convert Instrumentation Standard Signals and Process variables.InstaConvert is absolutely free. You can download it from Google Play Store. https://play.google.com/store/apps/details?id=com.infohe.simplyconvert&hl=en Following parameters can be converted with InstaConvert Instrumentation Standard Signals 4-20 ma to Percentage3-15 psi to Percentage0-20 ma to Percentage0-25 ma to Percentage Process Variables (Unit Converter)TemperaturePressure Other Parameters LengthMassSpeedVolumeAreaFuel …
Working Principle Of Bourdon Gauge If a tube having oval cross section is subjected to pressure its cross section tends to change from oval to circular. Construction of a Bordon Gauge Bourdon tube gauges consist of a circular tube. One end of the tube is fixed while the other end is free to undergo elastic deformation under …
Pressure Measurement – Bourdon Gauge -Working Principle Advantages and Disadvantaged Read More »
Working Principle of Differential Pressure Flow Measurement Flow measurements are essential to run a plant efficiently and safely.There are no real flow measurement technologies available including differential pressure flow also known as DP flow which utilizes a variety of measurement instruments. DP flow is measured with the combination a primary element and a secondary …
Variable Area Flow Meters Variable area flow meters are used to measure the volume flows of liquid and gases. Application of Variable Area Flow Meter – Volume flow measurements of Liquids and Gases Components – Vertical Conical Measuring Tube Mobile Float It consist of vertical conical measuring tube which widens upwards and a specially formed …
Variable Area Flow Meter – Application – Working Principle – Advantages Read More »
Ultrasonic Level Detectors Ultrasonic sound waves with frequencies of 1 to 5 megahertz can be used to detect liquid or solid levels. Ultrasonic are sound waves but are at higher frequencies that cannot be detected by the human ear. The most common kind of ultrasonic transducer consist of a piezoelectric crystal.When a voltage is applied to …
Manometers Manometers are one of the oldest type of pressure measurement. Manometers can be used to measure gauge pressure,differential pressure and absolute pressure. Various types of Manometers 1.U tube Manometer 2.Well type or reservoir manometer 3.Inclined manometer 4.Float type manometer U tube Manometer. U tube is made of glass.The tube is filled with a fluid known …
Pressure Measurement – Manometers Working Principle – Vaious types of Manometers Read More »
