Endress+Hauser Levelflex FMP55 - Blocking Distance; Level Unit

Levelflex FMP55 HART Operating menu
Endress+Hauser 143
Additional information For dielectric constants (DC values) of many media commonly used in various
industries refer to:
• the Endress+Hauser DC manual (CP01076F)
• the Endress+Hauser "DC Values App" (available for Android and iOS)
The factory setting, ε
r
= 80, is valid for water at 20 °C (68 °F).
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
(→  128):
• The unit defined in the Distance unit parameter is used for the basic calibration (Empty
calibration (→  130) and Full calibration (→  131)).
• 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 distance
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.