Honeywell SLG 700 User Manual page 124

Echo Curve Types
Windowed Echo Curve: In this echo curve type, data is shown only in the areas where the
transmitter is currently searching for reflections. On short probes (about 5 m depending on present
location of the level and process connector type) this will cover the full length of the probe but on
longer probes where the transmitter tracks the surface/interface reflections as they move, there will
be areas with no data visible. Subtraction of background reflections near the reference plane has
been applied to this data array so unwanted reflections, due to a nozzle for instance, will not be
visible. This type of echo curve is useful for troubleshooting the Correlation Algorithm settings as it
represents the data on which the correlation algorithm works.
Figure 32: Windowed Echo Curve
SLG 700 Series HART Option User's Manual
Page 116 Revision 5