MN301905 Rev A
59
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Advanced Adjustments (continued)
Step Eight
CREATE A NEW FALSE ECHO CURVE
Obstructions in the tank (mixer blades, side wall weld joints or material build-up, submersible pumps, piping,
other apparatus) or tall tank risers or installation fittings can create false echo returns that impair the sensor’s
measurement. This function maps all echo returns within the tank, differentiating between good and false
echoes, and stores those identified as false into the False Echo Curve, so they will not be considered in the
level measurement.
Note: A False Echo Curve should only be performed when the tank is empty so that all
false reflections will be detected. Before starting, measure and note the exact distance from the sensor’s
measurement location to the media surface. Setting the distance value too large or too short can force the
sensor into ignoring the true level.
1) From the Main Screen, press
Enter
to advance into the Main Menu.
2)
Press
Right Arrow
repeatedly until the arrow is next to Service.
3)
Press
Enter
to advance into Service Menu and Echo Curve will appear.
4)
Press
Enter
to make a change to the Echo Curve settings.
5) Press
Right Arrow
repeatedly until the arrow is next to Create New.
6)
Press
Enter
to advance into Create New. Enter the distance from the
sensor’s measurement location to the media surface.
7)
Use the
Right Arrow
to move one segment to the right
.
The
Right Arrow
will scroll left to right and then back to the first segment.
8)
When the value is correct, press
Enter
to save the setting and begin the False Echo Curve mapping.
The process may take a few minutes. When complete, the display will return to the Echo Curve screen.
9) When done,
press
ESC
to return to the Service Menu and press
ESC
a second time to return to the
Main Screen.
10)
From the Main Screen, press
ESC
and the Echo Curve Screen will appear. Follow the Check Echo
Curve procedure described at the end of Section Five to confirm that the sensor is performing correctly.
