910-269-EN, Rev. B, June 2011
Calibrating the EPOCH 1000 Series (Conventional UT Mode) 149
Figure 9-9 The second gated calibration signal
12. Couple the transducer to the thick calibration block step.
In this example, the transducer is coupled to the 0.500 in. step.
13. Use the [GATE] key to position gate 1 so that the first back-wall echo from the
known thickness step exceeds the gate threshold. Adjust the gain so that the echo
amplitude is at approximately 80
%.
14. Once a steady reading is achieved, choose 1/5 > Auto CAL > CAL Velocity.
The screen freezes and the Enter Value for Velocity Cal dialog box appears.
15. Adjust the value to match the known thickness of the gated indication (0.500 in. in
this example), and then choose Calculate to complete the calibration process.
9.6 Calibrating in Echo-to-Echo Mode
The sample echo-to-echo calibration described below is performed using Olympus
delay line transducer part number V202-RM, with a frequency of 10.0
MHz and an
element diameter of 0.25
in. (6 mm).
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