Answer / ayaz

first communicate ccr tag conform and turn MOS if required 
when 5 way manifold
1 hp side close 
2 equalizer  open
3  lp side close
and then hp and lp drain or vent should be open
the transmitter will show zero if not calibrate it
first adjust the zero 
2nd second span check and adjust 
and then service 
1 drain or vent close
2 equalizer close
3 and then hp side open and lp side open

My rtd working well at the same time r/i converter is not working properly.when power is given to rtd..it is giving 30mA and getting 2.4 mA if i remove the compensate leads No matter how many ohms.why it is happening like so?what is the solution?rtd range-0-200deg c& 4-20 mA o/p.please give me solutiin anyone......

1 Answers  

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In RTU Panel we are having several Analogue & Digital Inputs /Outputs. We are recently facing some problems over Analog inputs , which are not updating properly (But Digital Input are updating normally) Can any one tell me from where the problem is creating , we have checked PLC CPU card, Analog Input card & we reconfigured ,But still the issue is there. Issue : 1. Sometimes Analog values are updating & sometimes not. 2. Analog values are not updating normally , showing some wrong Values 3. Total dead (0 value) Analog values are Level & flow measurement from the field instruments. (But in field the instruments are working normally & Displaying the values normally in local display unit) This problem we are facing in our Water Plant. If any one experienced this same problem or having any ideas related to our issue PLS send your valuable Answers/Replies...

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without a positionar can a control valve operate? give the difference of operating with positionar and without positionar?

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