Figure 11-20 Active Aws With D Rating; Scanning Gain - Olympus EPOCH 650 User Manual

11.4.4

Scanning Gain

AWS codes require that you enter a certain amount of scanning gain to the Ref B gain
value. This allows you to locate flaws that might be smaller or deeper in the test piece
than the reference flaw.
To add scanning gain
1. Use the dB key to adjust the scanning-gain value necessary to perform the
inspection as outlined by the AWS Code.
2. Press Scan dB (P2 key) to toggle the scanning gain on and off as necessary.
To display a D indication rating value, the gated echo must peak at an amplitude
less than 110 % FSH (full screen height). You may need to turn off the scanning
gain, and even make further gain adjustments to bring the echo peak on screen.

Figure 11-20 Active AWS with D rating

DMTA-10055-01EN, Rev. A, February 2015
Software Features and Options 253