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2. Depending on measurement, insert the bayonets or close the caliper onto the sample. Click the instrument motion buttons to slowly lower the transducers to the sample (Figure 4). The autoclose button functions for either the caliper or the bayonets.
Figure 4.- GANTRY motion buttons.
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3. The program continually updates the velocity calculation and displays the value (Average of the sets of stacks) in the Velocity-Auto box (Figure 5).
Figure 5.- Signal graph and data Data display on the Velocity-Auto box.
It also displays a signal graph with a red vertical auto-pick location line (Figure 6), where the program's algorithm has placed the first arrival wave.
Note: Typical slide bar settings are 100 for the stack bar and10mV for the threshold bar.
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