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  • Level transmitters discrepancy

    by
    Sabeur
    Published on 01-25-2011 08:09 PM
    2 Comments Comments
    Quote Originally Posted by Sabeur View Post
    Dear All,
    I'm C&I engineer working on Level transmitters Trouble shooting. The problem that:
    I have level transmitters mounted on the same vessel at the same height but presenting some discrepancies.
    I explain more the situation:
    Each vessel has two DP level transmitters , same model ( Rosemount ): One for the safety and the other for control.
    I will be very thankful if you give me your ideas and views concerning this.

    Best Regards,
    Quote Originally Posted by bitmap View Post
    Hi,

    is the lower pressure port at the same pressure in both transmitters?
    The span, LRV and URV of the transmitters is the same?

    regards,
    Quote Originally Posted by amshah View Post
    If everything is same then check, mounting zero.

    your problem will be solved.
    Quote Originally Posted by Sabeur View Post
    Thanks every body for your help,
    @ bitmap:
    not all of them having the same pressure tapping points.
    But the problem consists that the given values are not adequate. I explain, when LT01 displays 50% the other must dispaly 30% (theoretically) but really it displays 15% for example.
    This article was originally published in forum thread: Level transmitters discrepancy started by Sabeur View original post
    Comments 2 Comments
    1. snowboard's Avatar
      snowboard - 02-01-2011, 02:31 AM
      verifies that the sample lines are not obstructs, also verified the working range of the transmitters. If you can, check the calibration of tranmisores.
    1. uttarasachin's Avatar
      uttarasachin - 02-09-2011, 08:49 AM
      Check the following

      Are both the levels increasing and decreasing praprotionally ?

      Is there any partition plate inside the vessel ?

      How many liquid outlets are there for the vessel ?

      pl elaborate the situation in detail

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