Endress+Hauser Micropilot FMR20 - Page 82

Operating menu Micropilot FMR20 HART
82 Endress+Hauser
Blocking distance 
Navigation  Setup → Advanced setup → Blocking dist.
Description Specify blocking distance (BD).
No signals are evaluated within the blocking distance. Therefore, BD can be used to
suppress interference signals in the vicinity of the antenna.
Note:
The measuring range should not overlap with the blocking distance.
User entry 0.0 to 20 m
Factory setting An automatic Blocking distance (→  82) of at least 0.1 m (0.33 ft) is configured as
standard. However, this can be overwritten manually (0 m (0 ft) is also permitted).
Automatic calculation of the Blocking distance = Empty calibration - Full calibration -
0.2 m (0.656 ft).
Each time a new entry is made in the Empty calibration parameter or Full calibration
parameter, the Blocking distance parameter is recalculated automatically using this
formula.
If the result of the calculation is a value < 0.1 m (0.33 ft), the Blocking distance of
0.1 m (0.33 ft) will continue to be used.
Level correction 
Navigation  Setup → Advanced setup → Level correction
Description The measured level is corrected by this value to compensate for a constant level error.
Level correction > 0:
The level is increased by this value.
Level correction < 0:
The level is decreased by this value.
User entry –25 to 25 m
Evaluation distance 
Navigation  Setup → Advanced setup → Evaluation dist.
Description Extended signal search area.
Is generally greater than the empty distance.
If the signal is found below the empty distance, '0' (empty) is indicated as measured value.
Only for signals, detected below the 'Evaluation distance', the error 'Echo Lost' is issued.
e.g. flow measurement in overflow weirs
User entry 0 to 21.8 m
Factory setting 21.8 m