Honeywell SLG 700 Option Manual page 55

3.6.4. Using Echo Curve for Troubleshooting
The following sections describe how to use the Echo Curve for troubleshooting. Based on the Echo
signal, required correlation algorithm configuration changes should be adjusted if there is a
measurement anomaly.
Background Subtraction Array: Selecting this echo curve type allows the data array that is used to
remove unwanted reflections in the region near the reference plane to be uploaded and viewed. This
type of echo curve is useful for troubleshooting problems in the region near the reference plane.
Reading Echo Curve
SLG 700 Fieldbus models support DTM running on FDT or FDM Host. Either FF DTM or FDM can
be used to read the Echo signal.
ATTENTION
SLG700 FF DTM should be installed before proceeding Echo read.
The following section describes reading the echo signal using FF DTM and storing it in text file in the
FDT Host environment. Navigate to the Level Auxiliary block and click the Echo Curve tab.
Note: It may take few seconds to load the Echo Curve page.
Configure the start and end distance of the probe for which the echo signal is required, Resolution and
Echo Type. Set the block to Auto mode and click Echo Read button, to read echo signal for the
configured distance. Once reading is complete, it will display the Echo wave in the format as shown in
the figure below.
Note: Echo curves supports a maximum of 1000 points. Echo curve points are calculated based on the
start distance, end distance and resolution. Parameter below the echo curve will be updated once echo
curve is plotted
Rev.5 FOUNDATION Fieldbus Option User's Manual Page 39