DMTA-10055-01EN, Rev. A, February 2015
Chapter 11
272
11.8.3 Setting the Material Velocity
Since the interface gate is often measuring the water path distance from the initial
pulse of the instrument to the interface surface of the test material, the EPOCH 650
allows the thickness measurement from the interface gate to be made using a different
material velocity than Gate 1 or Gate 2 measurements.
To set the material velocity
1. Navigate to the GateIF Setup menu item (group 2/5).
2. Press Vel oc ity (P7 key).
3. Use the adjustment knob or arrow keys to set the required velocity (see
Figure 11-33 on page 272).
Figure 11-33 Setting the material velocity
11.8.4 Using Run Mode
Run mode captures and tracks the indication breaking the interface gate and holds
this reflection at the left side of the display. This mode eliminates visibility to the
sound path of the signal before the interface of the test material. In many cases this is
a long water path and does not provide relevant inspection information.
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