Answer / bunny

A pneumatic control system is a control system consists of
pneumatic instruments.i.e,pneumatic transmitters,pneumatic
controlers,pneumatic actuators,pneumatic final control
elements etc.These instruments are working basically with
pneumatic signals(air pressure signals).Unlike an
electronic control system,which works on elecric signals
(voltage,current etc),a pneumatic controls system utilizes
air pressure signals for the communication.Tubes are used
for the transmission of these signals like wires and cables
in an electronic control system.

in DCS or PLC we can not put all ai or di,there is calculation through which we can accomodate certain no of digital and analog signal.I need to know that calculation

1 Answers  

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Why does a pressure gauge installed on reactor, doesn't have any vent line below to release the pressure? Is it any kind of designing mistake or it actually does not require any vent line? And if it does not require any vent line below it then how we are gonna release the pressure built inside the pressure gauge?

0 Answers   Process Control Technologies,

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please send me gail format if u have... please help me if u can...

1 Answers  

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What are the type of bonnets in the control valves?

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what is the analog input , analog output , digital output, digital input geven to the MSSV , CBD, IBD , START UP VENT , BOILER FEED PUMP , AOP, CEP , ETC

1 Answers   Bharat Biotech, TATA,

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why we us isolation barrier in hazardous area how it works to protect the area and please clarify its current flow.

0 Answers  

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what happen if i install my pressure transmitter below the elevation of pipe in natural gas service. Also support your answer

3 Answers   C2C,

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What s the exact height of installed transmitter?

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Can we use thermocouple in generator of power station replace RTD(pt 100)? if we don't have any place for use RTD.

2 Answers  

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why we are maintain the gap voltage in vibration probe when installing time can explain me?

1 Answers   CIL,

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hi i am eswar i want to know the instrumentation interview questations for eil(engineers india ltd) i have applied for engineer post in eil please help in this.my mail id eswar310@gmail.com

0 Answers  

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