Olympus Sonic 1200S/HR, Руководство пользователя

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82 Chapter 5
5.2.6 Thickness Using Multiple Echoes From the 1st Back Wall
to 2nd Back Wall Reflection, Echo-to-Echo
Adjust the operating controls as follows:
To measure between echoes, both Gate 1 and Gate 2 are used for thickness measurements.
Gate 1 position (start) must be to the left of the thinnest step (echo) for thickness
measurements. The width must be wide enough to cover the area where the 1st back wall echo
will appear (see
Figure 5-12 ).
Gate 2 position (start) must be to the right of the 1st back wall echo and to the left of the
thinnest 2nd back wall echo for accurate thickness measurements. The width of Gate 2 must be