Endress+Hauser Prosonic T FMU30 - Page 34

Commissioning Prosonic T
34 Endress+Hauser
6.3.3 Function "envelope curve display" (0E3)
The envelope curve is displayed in this function. You can use it to obtain the following information:
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Check that the following conditions are fulfilled:
• The echo quality at the end of measuring range should be at least 10dB.
• There should be practically no interference echoes in front of the level signal.
• If interference echoes cannot be avoided, they must be below the suppression curve.
!
Note!
If the cyclical envelope curve display is still active on the display, the measured value is updated at
a slower cycle time. We therefore advise you to exit the envelope curve display after optimising the
measuring point. To do this, press E. (The instrument does not leave the envelope curve display
automatically.)
6.3.4 Navigation in the envelope curve display
Using navigation, the envelope curve can be scaled horizontally and vertically and shifted to the left
or the right. The active navigation mode is indicated by a symbol in the top left hand corner of the
display.
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minimum distance
of the plot
maximum distance
of the plot
distance of
evaluated echo
interference echo
evaluated echo
is marked
quality of
evaluated echo
empty calibr.
envelope curve
only
envelope curve and
interference echo
suppression (map)
level echo
map
full calibr.
…
OE3
Move mode:
- m
-
oved to the left
moved to the right
Horizontal Zoom mode:
- h
-
orizontal zoom in
horizontal zoom out
Vertical Zoom mode:
- vertical zoom (4 steps)