how to calibrate corollaries (Mass flow meter)?

0 Answers   Honeywell,

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what is difference between wheatstone bridge, pirani gauge and strain gauge ??? explain its principle and working

4 Answers  

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What is difference between profibus and modbus communication

2 Answers   GMR,

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what is meant by nuclear collector?

0 Answers  

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A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.

0 Answers   MNC,

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Can a Differential Pressure Transmitter be used as a normal pressure transmitter??

3 Answers  

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How can we say that accuracy of measurement increases by using 3 or 4 wire RTD? because for example: If resistance of RTD element is say r ohms and Resistance of the cable from transmitter to RTD is R ohms And if 4 wire RTD is used, ____._____________________ R ohms | |_____._____________________ R ohms / \ / r ohms \ \ | |______.__________________ R Ohms | |_______._________________ R ohms Then the actual resistance measured will be: Total = r + R/2 + R/2 = r +R Ohms Note: r+R instead of r ohms. hence error

2 Answers  

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What is DeltaV?

2 Answers  

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calibration of instruments.

11 Answers   ONGC,

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How addressable fire systems work? Pl. send details with architect.(Loop), also send details regarding Gas system. Pl. help me.Thanks

0 Answers   Siemens,

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If the average power during generation is zero, why do the analog meters have + and - ?

1 Answers   Siemens,

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how micro-processor and micro controller different from architecture

3 Answers   Bhushan Power Steel,

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