Answer / amit

two wire system means power supply of instrument and signal
output both communication coming through 2 wire only.

Answer / asim

By 2-wire it means the transmitter is powered form the
system to which it is connected... normally 24VDC and 4-
20mA signal is connected to the control system using only
one single pair of wires.

what is meant by control valve sizing?

3 Answers  

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what are the standards used for earthing instruments in the field?

1 Answers  

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What is the difference between PLC and DCS?

3 Answers  

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wt kind of business we can do by usig PLC?

2 Answers   Dabur,

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0 Answers   Tecnimont,

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why we use 4-20 mA to do calibration of the instruments.why we cant use 0-20 mA?

8 Answers   Emerson, IEM,

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3 Answers  

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2 Answers   ADCO,

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Which standard is used for calibration of Control Valves ?

2 Answers  

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2 Answers   GATE,

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1 Answers  

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