Why the industry's standard current standards are from 4mA to 20mA,not from 0mA or any other range?

3 Answers  

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what is instrument philosophy

0 Answers   United Automation,

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how to work gas chromatography explain principle ?

2 Answers  

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For 150 mtr cable run from DCS panel to transmitter (24 VDC with 4-20 ma output), need cable size. 1.5 sqmm is suitable?

2 Answers   NA,

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what is insdustrial vibration.who it works. give atleast 2 types of insdustrial vibration

0 Answers  

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how to make a calibration for differential pressure

2 Answers  

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What is the basic principle of vibration measurement by BENTLY NEVADA vibration measurement system? and Why it gives the -ve voltage output?

14 Answers   Ensol, GNFC, Reliance, Siemens,

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What is cold junction compensation in thermocouples? How is it achieved?

4 Answers   Honeywell,

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A valve in series with an orifice plate (DP transmitter), is aligned for constant pressure in the pipeline, if there is an error dx, How to align it in process.

0 Answers  

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what is the criteria to decide conductor size of a cable ?

0 Answers  

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Define the terms Accuracy, precission, Spam, process tolerance while doing calibration of an instrument? Explaini with an example?

0 Answers   AquaTech,

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How can I read the electrical drawing easily?

2 Answers   Plot Enterprise,

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