910-269-EN, Rev. B, June 2011
Software Features and Options (Conventional UT Mode) 223
X Value
Used for angle beam inspections only. This is the length of the transducer wedge
from the BIP to the front of the wedge, and is used to remove the wedge length
from the surface distance measurements.
You, as a trained operator, must be aware of when it is necessary to apply values
to AcvSpecimen and AcvCalBlock. These values affect the shape of the
DGS/AVG curve and, therefore, affect the accuracy of defect sizing. A suggested
method for the measurement of relative attenuation can be found later in this
manual.
Once you have correctly completed the selections in the DGS/AVG setup page, press
[ESCAPE] to return the live A-scan display.
To complete the DGS/AVG curve setup
1. Couple the transducer to the calibration block and obtain a reflection from the
selected reference-reflector.
2. Press [GATE] to gate the reference indication.
3. Press [2
ND
F], [GATE] (AUTO XX%) to bring the reference-reflector to 80 % FSH.
4. Press [2
ND
F], [GAIN] (REF dB) to capture the reference-reflector and build the
DGS/AVG curve.
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