Levelflex M FMP40 FOUNDATION Fieldbus Commissioning
Endress+Hauser 69
6.7.3 Function "envelope curve display" (0E3)
You can obtain the following information from the envelope curve display in this function:
L00-FMPxxxxx-07-00-00-en-003
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
!
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
F
. (The device does not leave the envelope curve display
automatically).
6.7.4 Envelope curve
The Levelflex emits individual pulses in quick succession and scans their reflection with a slightly
variable delay. The energy values received are ordered by their time-of-flight. The graphic
representation of this sequence is known as an "envelope curve".
minimum distance
of the plot
maximum distance
of the plot
distance of
evaluated echo
evaluated echo
is marked
quality of
evaluated echo
empty calibr.
empty calibr.
empty calibr.
envelope curve
substracted signal
mapping
level echo
level echo
full calibr.
full calibr.
probe length
probe length
To Next Page
Loading...
