910-269-EN, Rev. B, June 2011
294 Chapter 17
15. Adjust the value to match the known thickness of the gated indication (9.000 in. in
this example), and then choose Calculate to complete the calibration process.
17.4.2 Calibrating the Wedge Delay With an Angle Beam Transducer
The wedge delay can be calibrated using a discrete reflector, such as a side-drilled
hole, or a back-wall reflection. In the following procedure the first back wall of the arc
of the IIW block is used to calculate the wedge delay.
To calibrate the wedge delay with an angle beam transducer
1. Press [RANGE], and then enter an appropriate range for the calibration.
For this example, use 6 in. (150 mm).
2. Choose 1/5 > PA Cal > Calibration = CAL Zero.
3. Choose 1/5 > PA Cal > CAL Mode = Soundpath.
The wedge delay calibration can be performed using a reflector of known depth,
such as a side-drilled hole. To use such a reflector, select 1/5 > PA Cal > CAL
Mode = Depth and follow the instructions below using the known depth as the
Wedge Delay value.
4. Press [ANGLE], and then adjust the selected focal law (angle) to 45°.
5. Couple the transducer to the test block at the 0 mark.
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