910-269-EN, Rev. B, June 2011
Calibrating the EPOCH 1000 Series (Conventional UT Mode) 153
If for any reason you need to exit without acquiring calibration data, use the
[RIGHT] or [LEFT] arrow key to highlight Cancel, and then press [CHECK].
9.7 Calibrating to Known Sound Path Values with an Angle Beam
Transducer
The following sample angle beam calibration procedure is performed using an
Olympus transducer part number A430S-SB with a frequency of 2.25
MHz and an
element size of 0.625
in. x 0.625 in. The transducer is mounted on a 45° wedge, part
number ABWS-6-45. An Olympus IIW Type
I carbon-steel calibration block, part
number TB7541-1, is used.
To calibrate using an angle beam transducer
1. Follow the initial setup procedure outlined in section 9.1 on page 134.
2. Connect the transducer to an appropriate cable, and then connect the cable to
either of the conventional transducer connectors at the top of the instrument.
3. Choose 1/5 > TRIG > Angle, and then enter the correct refracted angle for the
transducer/wedge combination (45° for this example).
4. Choose 1/5 > Basic > Velocity, and then enter the approximate shear-wave
velocity of the material being inspected (0.1280
in./µs or 3.251 mm/µs if working
in metric units for this example using carbon steel).
5. Choose 1/5 > Basic > Range, and then enter an appropriate range for the test block
being used (12.000
in. or 304.80 mm if working in metric units for this example).
Review the following procedures:
• “Locating the Beam Index Point” on page 154
• “Verifying the Refracted Angle” on page 155
• “Calibrating for Distance” on page 157
• “Calibrating for Sensitivity” on page 160
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