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

5 Answers  

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HI friends.I am Surya a BTech in Electronics and Instrumentation Engineering.I am going to appear Relince Industries Ltd all India writen test very soon. so plz help me by sendind the probable questions about my subject.My mail ID is surya.barik@gmail.com.

0 Answers   Reliance,

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What is use of condensate pot

5 Answers   Alstom, Petrocil, Samsung,

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Give me a simple formula to calculate the bore of orifice plate with datas avilable instead of BS 1040.I want to calculate the approximate bore size only.

0 Answers  

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how many types of sensor in instrumentation

3 Answers   SRACO,

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What is an analog input - output , digital input - output . Any example ???? How they r known its ai-ao or di - do

4 Answers   Torrent Pharma,

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What should be hight of CONTROL panel for access & OPERATION What is BIS & INDIAN STD for SAME?

3 Answers  

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what is electric motorised valve working principle.

1 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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Isometric drawings are generated during _________________ phase of a project

0 Answers  

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what is diffrence between analog card and digital card in plc.how analog card work,Please explain in detail.Please send it on abhi_vyas@sify.com

6 Answers  

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If the Barrier Fails during online then What will be the control valve position in field or Positioner action in the field.

3 Answers  

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