VEGA VEGAPULS 66 (≥ 2.0.0 - ≥ 4.0.0) standpipe ver. Foundation Fieldbus - Manual (Page 27)

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6 Set up with the indicating and adjustment module
VEGAPULS 66 standpipe version • Foundation Fieldbus
36526-EN-121011
The "Echo curve" shows the signal strength of the echoes over the
measuring range in dB. The signal strength enables an evaluation of
the quality of the measurement.
The "False signal suppression" displays the saved false echoes (see
menu "Additional settings") of the empty vessel with signal strength in
"dB" over the measuring range.
A comparison of echo curve and false signal suppression allows a
more accurate conclusion on measurement reliability. The selected
curve is continuously updated. With the [OK] key, a submenu with
zoom functions is opened:
•
"X-Zoom": Zoom function for the meas. distance
•
"Y-Zoom": 1, 2, 5 and 10x signal magnification in "dB"
•
"Unzoom": Reset the presentation to the nominal measuring range
with single magnification
With the function "Echo curve memory" the echo curve can be saved
at the time of setup. This is generally recommended; for using the As-
set Management functions it is absolutely necessary. If possible, the
curve should be saved with a low level in the vessel.
With the adjustment software PACTware and the PC, the high resolu-
tion echo curve can be displayed and used to recognize signal
changes over the operating time. In addition, the echo curve of the
setup can be also displayed in the echo curve window and compared
with the actual echo curve.
The following circumstances cause interfering reflections and can
influence the measurement:
•
High sockets
Diagnoses/Curve indica-
tion
Diagnostics/Echo curve
memory
Additional adjustments/
False signal suppression