why 4 to 20 ma? why cant some other range?

3 Answers  

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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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i want know about capillary type LT transmitter installation. we can install any location in between to HP and LP leg?

2 Answers  

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Hi buddies! i am facing a problem and if someone could help me it will be an immense pleasure to me. we have compect logix PLC 1769 2L AO module to Heat @ 52 to 56 Deg C .So if anyone can do please help me out with this problem.I'll be highly grateful.

1 Answers   Cadila,

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EXPLAIN NETWORK COMMUNICATION ON DCS?

0 Answers  

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Which softwere is required to communicate the S7-300 processor

4 Answers  

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How to ensure vibration sensor functioning accordingly.With out using an other sensor.

3 Answers   ACC, Oil India,

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I want to use 1/2 inch SS316 tube in my high pressure & temperature (64 kg/cm2 & 500 deg C)after condensate pot in pressure tranmistter. 1) Is it possible to use 1/2" ss316 tube in high pressure and temperature line. Tube manufacturer is local vendor. 2)On sarting the plant, We need to do system fluse that time condesate is not in the condesate pot so steam is directly contact with the tube. We have no exact calculation to know our tube is ok or nor at this time. pleae,reply.

1 Answers  

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difference between accuracy and precision

6 Answers   Honeywell, ONGC,

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What is the difference between fiber optic cable & Ethernet cable

2 Answers   BEMCO, CCC, Pidilite,

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what r all the closed loop used in boiler? for this related tell some web address..

3 Answers  

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how to calibrate mass flow meter (Coriolis)? Example calibration range: 0 to 2500 kg/hr line size 3" fluid: Etheline glycol (MEG)

0 Answers   Honeywell,

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