zero error in rosemount 3051s differential flow transmitter

[nidheesh1135]

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

 

[roydm]

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.

 

[davo54]

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

 

[btrueblood]

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

 

[kush desai]

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

 

[cavbilly]

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.