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6.1.2 Delay Auto-Calibration of Angle Probe
The specific operation steps are as follows.
(1) Put the angle probe on the test block, and make sure the coupling is good.
Refer to Figure 6-4.
(2) Adjust the test range to more than 100.0 mm, sound velocity 3250m/s. Adjust
gain appropriately. Move the probe to find the highest reflected echo of R50
and R100 arc surface.
(3) Enter the CAL main menu, select "speed/delay" calibration, S-REF 1: 50.0mm;
S-REF 2: 100.0mm.
Figure 6-4 Speed/Delay Auto-Calibration of Angle Probe
(4) Move Gate A to capture the echo of R50 arc (refer to Figure 6-5). Enter the
CAL submenu and press [+] key to confirm, then echo1 is recorded.
Figure 6-5 Move Gate A to Capture the Echo of R50 arc
(5) Move Gate A to capture the echo of R100 arc (refer to Figure 6-6). Enter the
CAL submenu and press [+] key to confirm, then echo 2 is recorded. Meantime,
