Why the Air Tank Accumulators required for the single acting actuators SDV's or BDV's as I see in some Schematic diagrams of ROTORK ??

2 Answers   L&T, Siemens,

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why we set -10 volt in vibration sensor output,why not +10 volt

3 Answers   GE, Honeywell, LLM,

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How we are blocking 40 kg or more pressure through only 6 kg instrument air in control valve 

3 Answers  

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How to calibrate DP transmitter by using HART communicator ?

1 Answers  

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what is dry leg and wet leg in transmeter calibration?

3 Answers  

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WHAT IS DIFFERENCE BETWEEN TWO WIRE RTD AND THREE WIRE RTD?

5 Answers   Yokogawa,

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what is metal of piston ring

0 Answers   MahaGenco,

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what are the definitions of input, output, command & signal according to instruments controlled by PLC using DCS System?

0 Answers  

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flow transmeter accuracy 0.075% of full scale & find ucertainty is 0.025 % so what is maximum limit band of uncertainty

0 Answers   ONGC,

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WHAT IS SELF CLEAN ELCTRODE IN MAGNETIC FLOWMETER?? WHAT DO YOU MEAN BY THIS TERM??

2 Answers   IOCL,

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We have ZR22G-100-S-A-E-T-T--E-A/CV/F1 Model Zirconia Oxygen analyser which is Yokogawa make. I kept the analyser in Flue gas path at Air pre heater area. My plant is 7.5MW Biomass power plant. For a particular fuel, Coconut Husk which contains Sodium and Potassium chlorides iam not getting proper reading, Analyser output always Zero. I calibrated the analyser and it is OK. For Other fuels like Wood chips, Cholam waste, DOB, Groundnutshells, Ply wood waste and all iam getting actual percentage of Oxygen. What is the main reason behind this draw back?

2 Answers  

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Describe how to calibrate various types of instruments and transmitters using ISA industrial consensus standard techniques.

4 Answers   Reliance,

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