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in a electronic controller why we are using 250 ohm resistance in input signal?is i/p is necessary in control valve when we are using electronic controller give details?
IOCL,
3 9900During valve sizing from all calculation you got flow coefficient CV 12,than what it means? like for selecting pressure transmitter if your MAWP is 12 bar than you select a capsule of max. 20 bar which cover your mawp 12 in same way for selecting control valve If CV is 12 than how we use it in selecting valve??????
1 4784Could you explain to me the enraf (servo gauge) mechanism. How it works ? and how it is working on archimedes theory while it's not immersed into the surface? and how can we calibrate it ? Thanx
1 5575Why Differential pressure transmitter is located below the tappings points for steam & condensible vapor flow measurement application?
2 7353how to connect 3 wire 4-20 mA transmitter in Plc system PLC system and how explain how the measuring data communicate with plc system.
1 17028how can we measure the pressure in underground cooling water pipeline by using pressure transmitter?what about the tapping position?
2 6815IS IT POSSIBLE TO CALIBRATE A LEVEL TRANSMITTER INDICATOR(ABB) USING HART COMMUNICATOR.? I MEAN TO CHANGE FROM ONE UNIT TO ANOTHER WITHIN INDICATOR (EG. INCH TO FEET)...? PLZ NOTE THAT I HAVE MADE THE UNIT CHANGE IN TRANSMITTER USING HART COMMUNICATOR..BUT WHAT ABOUT THE INDICATOR..?
2 6688Post New Instrumentation Questions
what is function of sensor, and how is it work , explain with difination
Define the difference between a stable versus an unstable controlled system and some of the tools you might use to be able to detect when this is happening and assumptions used for control system application design that could contribute to instability
how will you segregate the alarm levels in alarm management system during factory Acceptance Test
what is the reason while warning lamp is on while the engine is cranking?
What are continuances of connecting earthing and shield of branch cables (instrument to Junction box), at the same earthing pot provided on JB? Is it ok, or may produce some problem?
Draw symbols of the following :
Explain the combusion chamber
What are different types of orifice plates? State their uses.
What is the difference between conductive lined pipe and conductive unlined pipe? Why do we see that?
why we are using drum level control valve air to close?
Instrumentation Safe Guarding test. How to determine the interval time of the test. eg:Halfyearly,Every year,Every three years etc.
wich is coming the first HAZOP OR SIL
full process of gas turbin?
what does the ratio 800-400-300-200/1-1-1-1-1 in the specification of current transformer indicates?
PLEASE PROVIDE SAMPLES OF CHEVRON SKILL TESTS
