910-269-EN, Rev. B, June 2011
110 Chapter 6
6.1 Measurement Gates 1 and 2
The EPOCH 1000 Series has two independent flaw gates. In the A-scan, a gate is
represented by an horizontal line. The length and horizontal position of the line
identifies the sound path range, while the vertical position of the gate line represents a
threshold amplitude level for echoes of interest. In the EPOCH
1000 Series, gate 1
appears as a red line while gate
2 appears as a blue line.
Figure 6-1 Gate 1 and gate 2
Both gates can be used to take thickness measurements with straight-beam
transducers, sound path measurements with angle beam transducers, measure signal
amplitude, measure time-of-flight in microseconds, or to trigger threshold and
minimum-depth alarms. The gates can also be used together to take echo-to-echo
thickness measurements (see section
6.6 on page 116).
You can control the gates using the parameters in the 2/5 > Gate 1 and 2/5 > Gate 2
submenus (see
Figure 6-2 on page 111).
Gate 1 (red)
Gate 2 (blue)
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