Endress+Hauser Levelflex FMP51 - Page 183

Levelflex FMP51, FMP52, FMP54 FOUNDATION Fieldbus Operating menu
Endress+Hauser 183
Level unit 
Navigation  Setup → Advanced setup → Interface → 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
(→  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.
Blocking distance 
Navigation  Setup → Advanced setup → Interface → Blocking dist.
Description Specify upper blocking distance UB.
User entry 0 to 200 m
Factory setting • 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
Additional information 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.