Figure 8 Zoom View - Honeywell SLG 700 Option Manual

Zoom view: Use the mouse to draw a zoom box around the model, then click and drag the
9.
model position for best match to the curve. Notice that by dragging the model over the
similarly shaped blue curve at 338cm, the Objective Function value has decreased from
1.004 to 0.658, indicating a higher correlation between the shapes.
Notice at previous step, the brown model line's amplitude is slightly larger than the blue
10.
curve's amplitude. To reduce the model's amplitude to better match the blue curve,
decrease the Gain. By gradually decreasing Gain from 5122 to 3322 the model more
closely matches the blue curve while the Objective Function value has improved from
0.658 to 0.580.
In the bottom graph of the Objective Function the red line indicates the Threshold. The
11.
brown curve of the Objective Function must dip below this red Threshold line to be
recognized. If the Threshold is too low, increase its value to raise the red line slightly
above the dip as shown. Note that there should be only one dip that falls below the
Threshold line on the graph. If there are more than one, then the transmitter may report
incorrect position for the reflection.
Note
Rev.5
TIP: By slowly dragging the model back and forth over the curve you can home in
on the position with the lowest Objective Function value.

Figure 8 Zoom View

TIP: By using the up and down arrows to increase and decrease Gain you
can home in on the lowest Objective Function value.
In this example, the model mismatch was exaggerated to better illustrate
the process. See step 13 for the final model parameters.
FOUNDATION Fieldbus Option User's Manual Page 45