114 Wave User Manual
Version 4
24 Glossary
α (degree): Bevel angle α
β (degree): Bevel angle β
Angle (degree): Angle of the ultrasound beam exiting the probe
API: American Petroleum Institute
AWS: American welding Society
DAC: Distance amplitude gain
Delay (mm or in): Offset of the left side of the A-scan.
DGS: Distance gain size. Also known as AVG in German
ERS (mm or in): Equivalent reflector size
f (mm or in): Root face
First peak: The highest value between the first two gates crossing (full positive flank and
full negative flank), the first gate crossing being the flank.
Flank: The first positive flank to cross the gate (the first value higher than the gate
threshold that crosses the gate).
L1 (mm or in): Length of the left-side fillet weld
L2 (mm or in): Length of the right-side fillet weld
Lw1 (mm or in): Effective throat of the left-side fillet weld
Lw2 (mm or in): Effective throat of the right-side fillet weld
Overlay mode: Skip overlay mode
Peak: The highest value inside the gate.
PED (mm or in): Probe effective diameter
PRF: Pulse repetition frequency
Probe zero (μs): Time which the sound spends in the wedge.
R (mm or in): Root opening
r1 (mm or in): Groove radius #1
r2 (mm or in): Groove radius #2
Reference amplitude (%FSH): Reference amplitude for sensitivity calibrations.
Reject type: Signal rejection criteria. It removes noise from the A-Scan.
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