Endress+Hauser Micropilot FMR51 - Level Unit

Operating menu Micropilot FMR51, FMR52 FOUNDATION Fieldbus
140 Endress+Hauser
Selection • Foam (>5cm/0,16ft)
• Changing DC values
• Small tanks (< 1m/3ft)
Factory setting None
Additional information "Foam (>5cm/0,16ft)" option
This option makes sure that no tank history is used which has been recorded while foam
was present at the surface and thus is no reliable map of the tank property. To achieve
this, the setting Evaluation mode = Long time history is deactivated.
The Foam (>5cm/0,16ft) option is only available for liquid applications (FMR50,
FMR51, FMR52, FMR53, FMR54).
"Changing DC values" option
A tank history which has been recorded with Evaluation mode = Long time history is
only valid for a fixed dielectric constant. The Changing DC values option disables the
setting Evaluation mode = Long time history and thus avoids wrong measuring values in
the case of a changing dielectric constant.
The Changing DC values option is only available for liquid applications (FMR50,
FMR51, FMR52, FMR53, FMR54).
"Small tanks (< 1m/3ft)" option
This option provides a simple possibility to reduce the echo width of the sensor module.
This enables an improved detection of superimposed echos - especially in the near field.
Internally, all paramters related to the echo width are adjusted by this option.
The Small tanks (< 1m/3ft) option is only available for liquid measurements with 26
GHz HF module (FMR50, FMR51, FMR52).
Level unit 
Navigation  Setup → Advanced setup → Level → Level unit
Description Select level unit.
Selection
SI units
• %
• m
• mm
US units
• ft
• in
Factory setting %
Additional information The level unit may differ from the distance unit defined in the Distance unit parameter
(→  126):
• The unit defined in the Distance unit parameter is used for the basic calibration (Empty
calibration (→  127) and Full calibration (→  128)).
• The unit defined in the Level unit parameter is used to display the (unlinearized) level.