Endress+Hauser Levelflex FMP51 Operating Instructions Manual page 166

Operating menu
Level unit
Navigation
Description
Selection
Factory setting
Additional information
Blocking distance
Navigation
Description
User entry
Factory setting
Additional information
166
 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
(→  144):
• The unit defined in the Distance unit parameter is used for the basic calibration (Empty
calibration (→  146) and Full calibration (→  147)).
• The unit defined in the Level unit parameter is used to display the (unlinearized) level
and interface position.
 Setup → Advanced setup → Interface → Blocking distance
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.
Levelflex FMP51, FMP52, FMP54 HART
US units
• ft
• in
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