Olympus EPOCH 1000 Series - Transfer Correction; Figure 11-12 DAC Curves with Adjusted Gain

910-269-EN, Rev. B, June 2011
Software Features and Options (Conventional UT Mode) 209
depth/sound path time within a part, it is necessary to raise the gain of both the live
A-scan and the DAC curve to continue the inspection. This is accomplished on the
EPOCH
1000 Series using the curve gain (DAC curve adjustment gain).
To adjust the Curve Gain
1. Choose 6/6 > TVG > ∆ Curve dB, and then choose the desired increment of the
gain adjustment.
2. Choose 6/6 > TVG > Curve Gain, and then adjust the curve gain by the selected
increment either positive or negative.
Figure 11-12 on page 209 shows a DAC setup with DAC gain in use to provide
accurate echo amplitude measurement by placing the echo close to 80 % FSH.
Figure 11-12 DAC curves with adjusted gain
11.2.4.3 Transfer Correction
Transfer Correction is an adjustment in the reference gain setting during calibration of
the instrument, and is typically added when the surface conditions between a
calibration block and test piece are different. The coupling conditions on the test
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