Panasonic PV500 User Manual page 146

Setting Procedure
1.
Select "Search Method" in "Flaw Detection"
setting window.
2.
Select "Gray Range" for "Detect Mode".
"Num. of Cells for Calc. Range" and "Num. of Cells per Shift" become settable.
3.
Set "Num. of Cells for Calc. Range" and "Num. of Cells per Shift".
Num. of Cells for Calc. Range (2 - 256): The number of cells to be grouped.
Num. of Cells per Shift (1 - 255): The number of shifting cells to group the cells.
4.
Set "Threshold" and "Min. Flaw Size in Cells".
For details on threshold and minimum flaw size in cells, refer to "Inspecting in Differential Mode", page 142.
5.
After setting is completed, press the CANCEL key.
How to Find Appropriate Value for "Threshold"
With "Threshold Adjustment", you can check the number of flaws to be detected when changing threshold
value. This feature is effective if you do not know what threshold can detect the desired flaw.
After that, you can set the adjusted threshold as inspection condition.
1.
Select "Thresh.Adj.".
After a message appears, number of flaws to be detected for each threshold is displayed in descending
order of threshold by six rows.
By tilting the ENTER key up/down, you can display data in after the seventh row.
Tilting the ENTER key and pressing the SHIFT key moves the cursor faster.
2.
Move the cursor to each threshold and
check the number and the positions of
flaws that are detected according to the
selected threshold.
You can confirm the flaw detected according
to the threshold in the screen window.
The current setting value for threshold is
displayed above the table.
To observe the image easily, set "Window
Transparency (SETUP menu)" to larger
value. (How to change window
transparency: Refer to page 341)
Otherwise, press the F1key to display the
screen window in the front and confirm it.
3.
Select a threshold value to set.
When the dialog message appears, select "YES" to save the threshold.
The current threshold displayed above the table is changed. The threshold that has been set in Search
Method is also updated.
4.
After setting is completed, press the CANCEL key.
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