Olympus EPOCH 1000 Series - Curve Adjustment Options; Transfer Correction; Figure 11-21 DGS;AVG Curves on the Screen

910-269-EN, Rev. B, June 2011
Software Features and Options (Conventional UT Mode) 225
Figure 11-21 DGS/AVG curves on the screen
11.3.2 Curve Adjustment Options
Once a DGS/AVG curve has been calculated on the EPOCH 1000 Series, it is possible
to make adjustments to that curve during an inspection. These adjustments include
gain adjustments allowing proper defect scanning and code-compliant defect sizing,
as well as reference-reflector adjustments.
11.3.3 Transfer Correction
Transfer correction is an adjustment in the reference gain setting during calibration of
the instrument. It is typically added when the surface conditions between a
calibration block and test piece are different. The coupling conditions on the test
surface can often cause signal loss after calibrating a DGS/AVG curve, which results in
inaccurate comparisons of the test reflectors with the calibrated DGS/AVG curve. The
EPOCH
1000 Series allows you to adjust for this difference by adding transfer
correction to the calibrated base gain after completing the DGS/AVG curve setup.
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