910-269-EN, Rev. B, June 2011
Software Features and Options (Conventional UT Mode) 219
Figure 11-18 A-scan inspection with TVG table (table view off)
11.3 DGS/AVG
The Onboard DGS/AVG option in the EPOCH 1000 Series permits complete
DGS/AVG setups to be performed on the instrument. With the DGS/AVG method,
you can size defects based upon a calculated DGS/AVG curve for a given transducer,
material, and reflector size. This method requires that you only have one reference-
reflector in order to create a DGS curve for flaw sizing. This is much different than the
DAC or TVG method that requires that you have representative defects at various
depths within a part in order to create a curve for flaw sizing.
To setup DGS/AVG curves on the instrument very quickly, Olympus has developed a
transducer library that is stored in the instrument’s memory. This library contains the
entire Atlas Series European specification conventional transducers as well as several
other transducers that are commonly used by inspectors. The library includes five
categories:
1. Straight Beam contact (includes protected face)
2. Angle Beam transducers
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