Emerson Exchange 365

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A problem in calibration of dvc6030

We have two dvc6030s in our field and one of them had a problem.

It was impossible to be calibrated, both by HART menu and "Valve Link Mobile" software.

After enabling calibration and according to the messages in Hart menu and "Valve Link Mobile" the problem was because of failure in travel sensor. we checked travel sensors of both dvc6030s by ohm and they were the same.

Also only in Hart menu it was mentioned that the stroke of travel sensor is too small and the position of pin on the arm of the dvc6030 which had problem was near 1.5 inches. we changed the position of the pin to 2 inches and then it was calibrated without any problem.

I want to know how is it possible? because by changing the position of pin to 2 inches, the stroke would become smaller which is in opposite of with the diagnostic message in Hart menu???!!!      

  

• DVC6030

A.Mollaei

• 13 Sep 2013 10:13 AM
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2 Replies

• Charles Lim

  

  • 16 Sep 2013 1:10 AM

  Dear Sir,

   

  It might be a mismatch between setup wizard travel and actual physical travel.

   

  Best regards

  Charles

   

  From: A.Mollaei [mailto:bounce-AMollaei@community.emerson.com]
  Sent: Friday, 13 September, 2013 6:14 PM
  To: DVC@community.emerson.com
  Subject: [EE365 Valve Controllers & Positioners Track] A problem in calibration of dvc6030

   

  We have two dvc6030s in our field and one of them had a problem.

  It was impossible to be calibrated, both by HART menu and "Valve Link Mobile" software.

  After enabling calibration and according to the messages in Hart menu and "Valve Link Mobile" the problem was because of failure in travel sensor. we checked travel sensors of both dvc6030s by ohm and they were the same.

  Also only in Hart menu it was mentioned that the stroke of travel sensor is too small and the position of pin on the arm of the dvc6030 which had problem was near 1.5 inches. we changed the position of the pin to 2 inches and then it was calibrated without any problem.

  I want to know how is it possible? because by changing the position of pin to 2 inches, the stroke would become smaller which is in opposite of with the diagnostic message in Hart menu???!!!      

    

  • Cancel
• PNSiah

  

  • 17 Sep 2013 2:36 AM

  Hi Mr Mollaei,

   

  You mentioned that you got a message in HART menu that the stroke of travel sensor is too small. This message indicate that it could be cause by the insufficient pot (travel)count to complete the calibration.

   

  The actual travel of the actuator needs to tally with the travel scale marked on the feedback arm, if you have an actuator that travels 1.5 inches, you will need to align the pin on the 1.5 inches mark.

   

  So if your actuator travel is not 1.5 inches, then maybe the mounting mechanism maybe loose and the pin need to be reposition to the correct travel on the scale and perform a travel calibration again. If your actuator travel is 1.5 inches, then the other suggestion will be to recheck the travel sensor count, perform a travel sensor calibration if the count is out. The potentiometer only has a functional segment that it works on, operating the potentiometer out of the functional range will also cause a “travel sensor fail”.

   

   

  Thanks and regards,

  PengNam

   

   

  From: A.Mollaei [mailto:bounce-AMollaei@community.emerson.com]
  Sent: Friday, September 13, 2013 6:14 PM
  To: DVC@community.emerson.com
  Subject: [EE365 Valve Controllers & Positioners Track] A problem in calibration of dvc6030

   

  We have two dvc6030s in our field and one of them had a problem.

  It was impossible to be calibrated, both by HART menu and "Valve Link Mobile" software.

  After enabling calibration and according to the messages in Hart menu and "Valve Link Mobile" the problem was because of failure in travel sensor. we checked travel sensors of both dvc6030s by ohm and they were the same.

  Also only in Hart menu it was mentioned that the stroke of travel sensor is too small and the position of pin on the arm of the dvc6030 which had problem was near 1.5 inches. we changed the position of the pin to 2 inches and then it was calibrated without any problem.

  I want to know how is it possible? because by changing the position of pin to 2 inches, the stroke would become smaller which is in opposite of with the diagnostic message in Hart menu???!!!      

    

  • Cancel