Why ues 250 ohms Resistor during hart type instruments calibration with hart protocol in details ?

5 Answers  

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i want all model questions paper for robert bosch

1 Answers   Bosch, Patni,

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what are different types of cables used in instrumention how to calibrate a level transmitter online ( rosemount )

1 Answers  

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what is Pre- commissioning.

5 Answers   Saipem, Takreer,

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Explain why use mmwc unit?

0 Answers  

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What are continuances of connecting earthing and shield of branch cables (instrument to Junction box), at the same earthing pot provided on JB? Is it ok, or may produce some problem? 

0 Answers   Process Control Technologies,

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in sports(eg,cricket) what is the technique for measurement of speed of the ball thrown by the bowler.

6 Answers   BEL, PSU,

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Explain about SOURCING & SINKING concepts in PLC to field sensor wiring ?

4 Answers   GATE,

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What is cut off relay? And why use in PLC and DCS?

0 Answers  

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How can we calibrate pressure and flow transmitter in the field(online)?

3 Answers   Aramco, Reddy Labs,

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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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what is the difference between DELTA-V & FOUNDATION FIELD BUS

4 Answers  

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