what is the difference between SCADA and DCS?

5 Answers   ACC,

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please tel me the calibration of pneumatic controler.

0 Answers  

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what is difference between differial pressure & delta pressure?

3 Answers  

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A temperature sensor (RTD) connected via a temperature transmitter is adjusted to give an output of 4ma at 60 deg and 20 ma at 600 deg. This output (4-20ma) from the transmitter is connected to an IGBT-inverter to control a high speed (-12,000 to +12,000 RPM) DC motor. And in the inverter it is programmed as, for 4ma the motor speed will be -3,000 RPM and for 20ma the motor speed will be +10,000 RPM. The question is : If the motor speed is +5,500 (RPM), what will be the temperature? (-sign indicates that the motion is in reverse direction).

9 Answers  

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where do you give the 4-20 ma i/p in a MIL control valve?

3 Answers   Siemens,

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how many pulses are required by a ac induction servo motor of 4 poles with 50 Hz frequency to rotate by 1 degree?

0 Answers   United Phosphorus,

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Why we are using 4-20 mA as Analog signal transmission other than 3 to 19 or 2 to 18 or 6 to 22 like wise ? What is the reason behind using 4 & 20 mA? Can anyone give proper technical reply ?

5 Answers   Air Liquide,

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How is plc installing done

3 Answers   L&T,

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why we take 4 to 20 mA as out put of every instrument like pressure transmittre ?why we cant take 0 to 20mA as output?

6 Answers   OGDCL,

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Why in turbine used two critical speed band ?

1 Answers   Ankit Metal Power,

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Why is it necessary to use compensation leg to measure the liquid level in a closed or pressurized tank?

0 Answers  

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What is the difference between antisurge

1 Answers  

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