MN301905 Rev A
39
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Configuration
(with Display, continued)
Step Five
STEP 7 - CHECK THE ECHO CURVE
This function displays the primary echo return(s) that the sensor is seeing
graphically, the location and amplitude of the return(s), and the numeric air gap
distance from the sensor’s measurement location to the media level below.
Note: This step should only be performed after having completed the prior six
configuration steps with the sensor installed on the tank.
Additionally, if the
sensor was installed in a stand pipe or sight glass, now go forward to Section
Six and turn on the still well function (Sensor Installed in a Stand Pipe or Sight
Glass) before continuing with this step.
1) From the Main Screen, press
ESC
and the Echo Curve Screen will appear.
The curve graphically represents the primary echo return(s) amplitude (Y-
axis) over distance (X-axis). Above the echo return peak is a floating arrow
and triangle symbol (which under normal conditions are often merged
together or seen as a single triangle because it’s the larger of the two
symbols). The arrow represents the measured media level and the triangle
represents the peak amplitude location of the echo return. Under normal
conditions, expect to see a stable triangle (or overlapping arrow and
triangle) floating above a pronounced peak at the expected air gap distance
between the measurement location and media level.
2) In the upper right hand corner of the screen are two lines of numbers that
represent the air gap distance from the measurement location to the media
level (arrow) on the top, and peak amplitude location (triangle) of the echo
return on the bottom. Under normal conditions, these values should be
relatively close to one another and consistent with the expected air gap
distance between the measurement location and media level.
3) Assuming that the sensor is properly installed, if the measured media level
and peak amplitude location data (symbols and values) are unstable,
substantially different from one another and/or inconsistent with the actual
air gap distance, then this likely indicates that the sensor requires
additional process adjustment(s) described in the following Section Six.
4)
When done, press
ESC
to return to the Main Menu.
