Answer / ahmed allam

if you mean protection of for example power plant
so the most important parameter is scan time of
the controller must be very fast so action be very fast

I faced several time siemens ps2 positioner automatically getting Chang in it's set point direction after auto calibration  So is there any causes biside this or  any  permissives ?

0 Answers  

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what is a vortex flow meter,mass flow meter and electromagnetic flow meter.particular use of this.means in which condition particular meter is used.

0 Answers   L&T,

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what is PID n give me brief info. about P&I&D.

2 Answers  

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all questions related to instrument technician in any offshore oil and gas company.

0 Answers  

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What is governor of turbine?

3 Answers   Reliance,

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What is safety barrier and how it is work

2 Answers   IOCL,

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What is transducer

4 Answers   IFFCO, Jindal,

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I want to take temp. data from recorder to computer. Which communication system is best from this option(Rs 232- 485/ethernet/USB)?

3 Answers  

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What is scale factor of proximitor & unit of the viabration.

2 Answers   Sabic,

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SOME OF YOUR QUESTIONS ARE NOT MAKING ANY SENSE SO TRY AND PUT IN A LITTLE BIT MORE EFFORT BEFORE YOU POST A QUESTION. WE WILL ONLY HELP THOSE WHO WE CAN SEE ARE TRYING TO HELP THEMSELVES.

0 Answers  

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generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?

2 Answers  

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what is the difference between -24 : +24 & 0:24 and where it use?

0 Answers  

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