detail of mass flow meter pricipal

0 Answers  

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Why Pressure Transmitter is NOT installed before up-stream of an ORIFICE PLATE? in a flow measurement.

4 Answers   Mecon,

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what is the use of conrol cable..?

1 Answers  

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what is the input to be given in digital flow meter during the the calibration time?

0 Answers   ONGC,

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what is modbus?and why use it?what benifit

2 Answers  

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What is the purpose of valve positioner. Explain 4 uses.

2 Answers   SRACO,

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In closed loop control there are several “blocks” used to show the interactions between the process and the control system. These blocks are referred to as the “process” and the “controller.” Describe the relationship between these two blocks when creating a well tuned control loop.

1 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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How the flow can be measured by using DP Transmitter?

3 Answers  

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why can't we use 5-20mA standard or some other instead of 4- 20mA?

6 Answers   Emerson,

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why the derivative in PID is always set to zero?

3 Answers  

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How we will check whether the proximity, which we have is either NPN or PNP, if no data sheet or manual or any details is available to us ???

1 Answers  

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