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DCS level transmitter VS ESD level transmitter

HI

We have installed in our facility, in an oil water separation drum, two level transmitters.  One connected to DCS and one connected to ESD system, both measure water (water side of drum). The two LTs are connected in two individual nozzles (different tapping points), and both give different level readings (a constant difference of almost 20%). My question is, is it normal that there is a deviation between the two LTs? May there be a reason or a philosophy behind this installation/configuration that I am not aware of? I wanted to eliminate this option that any two LTs in the same vessel are meant to read the same level so I start troubleshooting this deviation issue.

I would like to hear from you on this please

Thank you very much      

 Regards

yacine

• 18 Jul 2018 8:05 AM
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2 Replies

• John Stephens

  

  • 18 Jul 2018 10:59 AM

  What type of level transmitter are you using and are they both the same type? I would expect them to read much closer than 20%, I would start with double checking the configuration and making sure it matches the installation and media then proceed to calibrating the transmitters.

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• Lydia Miller

  

  • 6 Nov 2018 10:53 PM

  If you are using two different technologies, there can be specific reasons why the readings are different. If you have the same technology, it could be that they are not configured the same way. Or maybe the measurement points have differences perhaps due to an uneven tank installation.

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