NIVELCO EasyTREK SP-500 Pro, Инструкция по установке и программированию

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The threshold can be adjusted in the Echo Diagram window in
EView2. In addition, the height of the threshold as a whole can
be adjusted in a simplified manner with the "Threshold offset"
parameter P34 between the measurement optimization
parameters. The main threshold line is used to follow the
general shape of the echo curve. Threshold highlights, also
known as threshold masks, are available to mask interfering
echoes protruding from the curve.
The threshold can be edited either by selecting "Threshold Edit
Enable" in the bottom menu bar or "Threshold settings" →
"Threshold Edit Enable" in the context menu that appears on
right mouse click. The threshold editing bar appears in the
upper half of the window, and the editable points are marked
red on the threshold curve. If no editable point is selected, the
"Threshold offset" can be set in the function bar, so the height
of the three-point basic threshold curve is the same. If an
editable point is selected by left-clicking, its position can also
be edited separately. Threshold points can also be moved
graphically with the mouse by holding down the left mouse
button on the selected point.
Figure 1. Main threshold curve
The changes only take effect in the device after pressing the "Apply Threshold settings" button, which can also be found in the threshold edit bar in the context
menu. To display the evaluation corresponding to the new threshold, refresh the chart with the "Refresh" button in the bottom menu bar (or with the F4 key).
Use the "Threshold mask" function to mask interfering echo peaks, by pressing the "Add new Threshold mask" button in the threshold edit bar, left-click on the
position in the diagram where the threshold highlight is to be placed. To use the function via the context menu, right-click on the position and select "Add new
Threshold mask" function. The position and width of the threshold mask can be adjusted afterwards by selecting the center point of the highlight in the threshold
edit bar as described above. Alternatively, for graphic editing, its position and height can be changed by dragging the center and adjusting the width by dragging
the corner point. A total of 4 threshold highlights can be defined. If there are more interfering echoes than that, the mounting position should be changed.