Answer / raja2016

safety barriers simply neglecting the spike voltages from the field that affecting the electronic I/O cards in the PLC system by fuse blow down in it
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Answer / vikash shukla

safety barriers are device which are used to lower the electrical energy when transmitting signal from hazardous area so that combustion and other accidents can be avoided.

what is modbus,profibus,fieldbus

2 Answers  

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what is dry leg and wet leg in transmeter calibration?

3 Answers  

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What is the DIfferences between SMART transmitters and PROFIBUS DP/PA Transmitters?

4 Answers  

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plz tell me clearly about PID.."when v have to change I value,D value,GAIN??

0 Answers  

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what is the difference between plc & DCS?

5 Answers   Cheminova, NGIL, Siemens,

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Why is the orifice tab provided?

0 Answers  

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why we require Differential pressure?Why we use Orifice Plate?

3 Answers  

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We do have a problem in the company that is one PT connected to PlC which is mean 1 out of 1 in PLC system we do have the PAHH is 55 mbar and PALL 8 mbar with a timer of 15 sec for the PAHH the problem started when PAHH goes more than the set point which is 55 it reached up to 71 but due to timer doesn't trip . We force it and we checked everything nothing there . We replaced the transmitter problem still there the reading goes more than the 55 bar the range for transmitte is 0- 60 mbar . So we did loop check , aculaizing valve , wiring all are okay . What the possible causes for this ???

2 Answers   National Petrochemical Company,

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what is difference between DO and DI

6 Answers  

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Please can anybody tell me the step by step procedure for calibrating the Pr,Lvl,Fl,Temp transmitter on process?

1 Answers  

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Hot calibrate a level transmitter (wet & dry legs)?

1 Answers   Honeywell, IEC,

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0 Answers  

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