Endress+Hauser Levelflex FMP51 Operating Instructions Manual page 183

Levelflex FMP51, FMP52, FMP54 FOUNDATION Fieldbus
Level unit
Navigation
Description
Selection
Factory setting
Additional information
Blocking distance
Navigation
Description
User entry
Factory setting
Additional information
Endress+Hauser
 Setup → Advanced setup → Interface → Level unit
Select level unit.
SI units
• %
• m
• mm
%
The level unit may differ from the distance unit defined in the Distance unit parameter
(→  159):
• The unit defined in the Distance unit parameter is used for the basic calibration (Empty
calibration (→  161) and Full calibration (→  162)).
• The unit defined in the Level unit parameter is used to display the (unlinearized) level
and interface position.
 Setup → Advanced setup → Interface → Blocking dist.
Specify upper blocking distance UB.
0 to 200 m
• For coax probes: 100 mm (3.9 in)
• For rod and rope probes up to 8 m (26 ft): 200 mm (8 in)
• For rod and rope probes above 8 m (26 ft): 0.025 * length of probe
Echoes from within the blocking distance are not taken into account in the signal
evaluation. The upper blocking distance is used
• to suppress interference echoes at the top end of the probe.
• to suppress the echo of the total level in the case of flooded bypasses.
US units
• ft
• in
Operating menu
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