how can we calibrate the differential pressure transmitter by using HART communicator

8 Answers   Hindalco,

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any body tell me ,contol valve has how many cheractristic? explain it.

6 Answers   L&T,

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Please anyone answer my question, what is the difference between single acting and double acting control valve, in what condition we better choose single acting rather than double acting

2 Answers  

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what is the relation between flow and pressure.for example relationship between level and pressure is p = phg like that i want ans for this question.and also how to calculate orifice sizing and flow transmitter. pls some one ans for this questions.

3 Answers   Orchid, SRF,

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Where are use of pressure,level,flow switches?and what is input and output

3 Answers  

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what is a mapping in plc & dcs

1 Answers   Arctern, ARM Cement,

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please send me the inteview questions in IOCL

0 Answers   IOCL,

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give classification of transducer based on type of application

2 Answers  

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why we are using analytical instrument in plant ?

1 Answers  

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How much should be the values and/or percentages of these given below factors for a good controller ? Steady state error Delay Rise Time Overshoot Peak Time Settling Time Damping Oscillations & vibrations thanks

1 Answers  

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in my plant 100% feedwater control v/v is air to close but due to instrument air fail,the valve opens but instead of drum level high its get tripped in low low drum level.the urv of level tx is 0 and lrv is -800.pls tell me the reason. for such behaviour.

1 Answers   Sirpur Paper Mill,

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Witch type cable use for rtd ,why?

2 Answers   Sugar Factory,

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