K-Patents PR-23 - Manual (Page 42)

34 PR-23 instruction manual
5.4 Viewing sensor status
Select SENSOR STATUS at the Main menu.
5.4.1 Optical image
There are two different image detecion algorithms in the PR-23. The original image
detection algorithm has been complemented with an advanced IDS (Image Detection
Stabilization) algorithm which compensates for some unwanted noise in the image.
These algorithms differ somewhat in how the image looks like, but the meaning of
different diagnostic values is the same.
With the original image detection algorigm the Optical image graph (See Figure 1.4
for explanation) should look like Figure 5.6, right side. The vertical dotted line indi-
cates the position of the shadow edge. For empty pipe, the optical image looks like
Figure 5.6, left side. The soft key
SLOPE leads to a graph (Figure 5.7) showing the slope
(or first differential) of the optical image graph in Figure 5.6.
Note: In case there is no signal from the sensor, the image field is crossed over.
Empty pipe Normal conditions
Figure 5.6 Typical optical images without IDS
Figure 5.7 A slope graph without IDS
5.4.2 Optical image with IDS
For the IDS enabled image detection algorithm the images look like figure 5.8 and the
slope like figure 5.9.