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How to calibrate Displacer level transmitter
Calibration procedure - Displacer type level transmitterProcedure:*Ask panel man to put the controller in manual mode for control loop and to put it on MOS for ESD loop.*Hook up HART Communicator and...
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How to calibrate offset Displacer level transmitter
How to calibrate offset Displacer level transmitter Procedure:*Hook up HART Communicator and verify some parameters by refer to data sheet. Typical parameters are, tag number, PV, LRV and URV.*Isolate...
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How to calibrate Dp level transmitter for low side dry leg
 Differential level transmitter for low side dry legCalibration Procedure:*Hook up HART Communicator and verify some parameters by refer to data sheet. Typical parameters are, tag number, PV, LRV and...
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How to Calibrate Differential Pressure Level transmitter with actula pressure
DP level transmitter with actual pressure *Hook up HART Communicator and verify some parameters by refer to data sheet. Typical parameters are, tag number, PV, LRV and URV.*Isolate the instrument from...
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Basic Concept of PLC (Programmable logic controllers).
What is PLC? PLC is a solid state device which control output device based which control output device based on input device and user developed program. It performs relay equivalent functions.Modern...
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How a Level troll works? Name the parts of a pneumatic Level troll.
Level troll-Level measuring instrumentA Level troll in and instrument used for measuring the liquid level between two known points. The Level troll works on the buoyancy principal. Leveltrol has a...
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[Instrumentation interview question ]What is a ‘controller’? Area of...
Standalone controller (PID)A controller is an instrument used for controlling a process variable (measurement). Its continuously monitors the error signal and gives a corrective output to the final...
View Article[Instrumentation Interview Question] Pressure measurement
Pressure is defined as force per unit area. Pressure above atmospheric is mostly measured in pounds per square inch (PSI), or in kilo gram per square centimeter (kg/cm2) gauge or absolute. For lower...
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[Instrumentation Interview Question] What is Thermocouples? Standard...
ThermocoupleA thermocouple consists of a pair of different metal or alloys joined together at both ends. One end, measuring junction, is placed where temperature is to be measured. The two conductors...
View ArticleNames and purpose of different type of Instruments [Part1]
absorptiometerinstrument for measuring solubility of gases in liquidsaccelerometerinstrument for measuring acceleration or vibrationsacetimeterinstrument for measuring strength of...
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Basic troubleshooting of Electrical components in MCC/Electrical Control...
1. SDF (Switch Disconnector Fuse)Switch Disconnector FusePossible Fault:- Fuse Burning. Identification:- Check the fuses continuity with a Multi Meter. Cause:- Over Current, Short...
View ArticleHow to Classify Pressure measuring Instruments?
Classification of Pressure measuring instruments We can classify the pressure measuring instruments into 3 major categories1.Moderate Pressure measurement2.Very high-pressure measurement3.High vacuum...
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Level Transmitter Calibration - Zero Suppression and Zero elevation
Level Measurement  - Zero SuppressionIf an instrument is mounted below a vessel it sense a total head but the head due to the distance from the instrument location to the bottom of the vessel does not...
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What is a relay ? Internal architecture of a relay
Relays - Relays are switches that open and close circuits when actuates with an electrical signal.A switch is a device that can open and close when actuated manually,typically through a physical action...
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What are the differences between circuit breaker and fuse ?
The differences between circuit breakers and fuses.Both residential and industrial electronics circuits systems require some form of protection toprevent catastrophic failure circuit damage or loss of...
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Working Principle of a Float operated Level Switch
In a float operated level switch the float rides in the process liquid surface precisely tracking liquid surface motion.Rising liquid level lift the float sliding the attraction slip up inside the...
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Types of Valve
Valves are used for1.Full flow of throttle :which is a wide range for valves use,because valves are designed in a way way to reduce pressure losses for fluids passing through theses valves,diaphragm...
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Basics of Pressure Regulator (Pressure Reducing Valve - PRV)
Pressure regulatorSelf-Operated devices which work off the medium alonePressure reducing valve - PRV : Lowers inlet pressure to desired pointHow PRV works?Internal architecture of a Pressure...
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Instrumentation : Basics of pressure measurement
Pressure measurement Pressure is an important process variable.Pressure is defined as force per unit area.Pressure = Force / AreaForce can be represented as Pound force,Kilogram force,Newton,dyneArea...
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Level Measurement - Magnetic Gauges
Magnetic GaugesMagnetic gauges can often be used in applications where a sight glass is not practical.A Magnetic gauge uses the attraction between two magnets to follow the level of a liquid.One magnet...
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