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zero error in rosemount 3051s differential flow transmitter

zero error in rosemount 3051s differential flow transmitter

zero error in rosemount 3051s differential flow transmitter

(OP)
we have a rosemount 3051s differential flow transmitter mounted on a RO SKID.As part of calibration we checked the instrument before installation and found the transmitter showing very large error in zero(420mbar)when the calibrate range in 0 to 250mbar.so we tried to do zero trim the instrument from field communicator but it failed and showing that excess correction.anyone know how to solve this problem? waiting for your help...
regards,
nidheesh

RE: zero error in rosemount 3051s differential flow transmitter

Is it possible the transmitter has been grossly over-ranged causing a permanent offset,
This could happen due to thermal expansion if the transmitter were isolated by a valve.

RE: zero error in rosemount 3051s differential flow transmitter

Manifold/flange adaptors have been torqued properley during install?.
Might need to take instrument back for a bench test

RE: zero error in rosemount 3051s differential flow transmitter

You verified the lines were empty of fluid before checking zero?

RE: zero error in rosemount 3051s differential flow transmitter

make sure you have equalized your transmitter before zeroing. this could also give you the error

RE: zero error in rosemount 3051s differential flow transmitter

A quick search yields ample product support from Emerson-Rosemount. What did they say when you telephoned them?
pressure transmitter family

Surely you can access a copy of the manual, and look at the "troubleshooting" section.
It does sound to me that you have a blockage over the element(s), or at least a partial blockage. I hope you did not allow trash into the line upstream.peace

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