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Hi,
We are having persistent problems with 10 out of 16 magnetrol displacer level transmitters which we have installed in Nov 2001. They are all model E6 (EZ series), installed on 7 separate vessels. Quite a few are installed in 'pairs' with one being for shutdown and one for control.
The problems are mainly with flat-lining and or significant deviation from the other transmitter, but both these problems can be corrected (for a short-time at leas) by isolating/draining/ refilling the displacer chamber.
It is unlikely to be earthing problems causing this. The displacer chambers (which were locally made - not magnetrol cages) do have sufficient clearance for the displacers. Hydrates are also not a problem at the temperatures/pressures involved. Wax or build-up is something we plan to investigate.
The service varies but problem transmitters all involve measurement of hydrocarbon condensate, either liquid/liquid interface or liquid vapour interface.
Does anyone have any suggestions on what the problem here could be or has anyone had similar experiences?
We are having persistent problems with 10 out of 16 magnetrol displacer level transmitters which we have installed in Nov 2001. They are all model E6 (EZ series), installed on 7 separate vessels. Quite a few are installed in 'pairs' with one being for shutdown and one for control.
The problems are mainly with flat-lining and or significant deviation from the other transmitter, but both these problems can be corrected (for a short-time at leas) by isolating/draining/ refilling the displacer chamber.
It is unlikely to be earthing problems causing this. The displacer chambers (which were locally made - not magnetrol cages) do have sufficient clearance for the displacers. Hydrates are also not a problem at the temperatures/pressures involved. Wax or build-up is something we plan to investigate.
The service varies but problem transmitters all involve measurement of hydrocarbon condensate, either liquid/liquid interface or liquid vapour interface.
Does anyone have any suggestions on what the problem here could be or has anyone had similar experiences?