Micropilot FMR50/FMR51/FMR52/FMR53/FMR54/FMR56/FMR57 FOUNDATION Fieldbus The "Expert" menu
Endress+Hauser 83
Description of the parameters
GPC mode (1034)
Navigation Expert → Sensor → Gas phase compensation → GPC mode
Write access Maintenance
Description Selection of the GPC mode
Options • Off
The gas phase compensation is deactivated.
• On
This option can only be selected for probes with reference echo. The gas phase
compensation is calculated from the position of this reference echo. The displayed
envelope curve does already contain the correction.
• Without correction
This option can only be selected for probes with reference echo.The correction factor is
calculated from the reference echo but not applied to the measurement.
This option is only used for diagnostic purposes and should not be used for normal
applications. The envelope curve is displayed without the correction.
• External correction
This option can only be selected for devices with PROFIBUS PA or FOUNDATION
Fieldbus. The device receives the externally measured pressure through an AO block and
uses it together with the gas phase compensation factor F to calculate the gas phase
compensation. The displayed envelope curve does already contain the correction.
• Const. GPC factor
The correction factor is a constant defined by the user. A reference echo or an externally
measured pressure are not needed. The displayed envelope curve does already contain
the correction.
Factory setting Off
External pressure selector (1073)
Navigation Expert → Sensor → Gas phase compensation → External pressure selector
Write access Maintanance
Prerequisite Only available for PROFIBUS PA or FOUNDATION Fieldbus and if GPC mode = External
correction
Description Defines the AO block through which the external pressure used for gas phase
compensation is received.
Options • None
• Analog output 1
• Analog output 2
• Analog output 3
• Analog output 4
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