What is difference between profibus and modbus communication

2 Answers   GMR,

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key exchanges in wpa,wpa2,tls

0 Answers  

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What is wet leg condition and why is it used?

0 Answers  

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What is force balance principle?

0 Answers  

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how can use ram

0 Answers  

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why the derivative in PID is always set to zero?

3 Answers  

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Tell me the field calibration procedure step by step with diagram of pressure gauge, pressure switch, pressure transmitter, temperature switch, level switch, flow switch, flow transmitter.

0 Answers  

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what is zero trim and span trim?. at which problem we need to use this?

3 Answers  

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what is the difference between single and double compression cable gland

3 Answers   Petrofac,

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Hi Friends i am going to write BARC written test by this month 20th (20-5-2008). So please if any body knows the details about this or having previous question papers pls mail me to kkumarei@gmail.com. For Suggestions give one message to 9962122264

0 Answers   PDIL,

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In 2 wire transmitter 1 wire is used for power and other is used for signal( 4-20)ma In 4 wire transmitter 2 wires are used for power and 2 wires are used for signal (4-20)ma . but my question is "what is the criteria or parameters we have to consider while selecting these transmitters for eg( distance, safety zones etc.

1 Answers  

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difference between repeatability and reproductability

1 Answers   IOCL,

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