Why plc require in analog input 4-20amp & 0-10 volt?

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How to calibrate capillary type level transmitter

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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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what are different types of cables used in instrumention how to calibrate a level transmitter online ( rosemount )

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how to calibrate displacer type level transmitter by dry weight method please mention formula for weight calculation

1 Answers  

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how to measure draft pressure in transmitter pl. give its single line digram

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How can i test procedure grounding for CAT-7 cable? Or How can we test procedure CAT-7 Cable Electrically safe?

0 Answers   Tecnimont,

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whats the abbreviation of IOP? is it instrument of power or input open problem?

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where using the 0-20ma in feiled instrumentation? why its using?

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Operational amplifiers

0 Answers   CCIE,

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what is temperature compensation?

1 Answers  

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Consider a level troll. i am getting a correct value in 4mA and 20mA. the value in the middle(30 to 60%)is disturbed and i am not getting the appropriate value. what is the solution to normalize the level and to get the correct value..

2 Answers   KNPC,

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