Endress+Hauser Prosonic S FMU90 PROFIBUS DP - Parameter Set Check Value

Commissioning Prosonic S FMU90 PROFIBUS DP
58 Endress+Hauser
9.3.7 Parameter set "Check value"
• This parameter set starts interference echo suppression (mapping).
• To record all the interference echoes, perform mapping at the minimum level
possible (ideally in an empty channel).
• If it is not possible to empty the channel during commissioning, record preliminary
mapping when the channel is partially filled. Repeat mapping when the level
reaches approximately 0% for the first time.
(a)
(b)
(c)
(a)
(b)
A
B
C
(a)
A0035533
 48 Operating principle of the interference echo suppression (mapping) function
A The echo curve (a) contains an interference echo and the level echo. Without mapping, the interference echo
might also be evaluated.
B Mapping generates the mapping curve (b). This suppresses all the echoes that are inside the range of
mapping (c).
C Afterwards, only echoes that are higher than the mapping curve are evaluated. The interference echo is below
the mapping curve and is therefore ignored (not evaluated).
Navigation
Basic setup → Check value
Parameters
• Distance
Displays the distance D currently measured between the sensor membrane and the
surface of the liquid.
• Check distance
Compare the distance displayed with the actual value and enter the result of the
comparison. Based on the entry, the device automatically determines the range of
mapping.
• Distance = ok
The displayed distance and actual distance match.
→ Continue with the parameter set LVL N dist. map..
• Dist. too small
The displayed distance is smaller than the actual distance.
→ Continue with the parameter set LVL N dist. map..
• Dist. too big
The displayed distance is larger than the actual distance.
→ Mapping is not possible.
→ Setup for sensor N ends.
• Dist. unknown
Actual distance is unknown.
→ Mapping is not possible.
→ Setup for sensor N ends.
• Manual
The range of mapping is to be defined manually.
→ Continue with the parameter set LVL N dist. map..