Figure 3: Windowed Echo Curve - Honeywell SLG 700 Option Manual

3.6.3. Echo Curve Types
The Honeywell SLG 700 captures four types of echo curves:

Windowed Echo Curve

Full Echo Curve

Processed Full Echo Curve

Background Substraction Array Echo Curve
ATTENTION
When DTM is opened, Echo curve page under RLAUXTB will take
about 30 sec to update parameter list during the update time the
page will show blank.
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 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.
Page 36

Figure 3: Windowed Echo Curve

FOUNDATION Fieldbus Option User's Manual Rev.5