910-269-EN, Rev. B, June 2011
Gates (Conventional UT Mode) 121
Figure 6-7 Gate tick marks indicating alarm threshold type
To set a threshold alarm
1. Activate the gate by selecting 2/5 > Gate<n> > Status = On.
2. Position the gate to cover the desired area.
3. Choose 2/5 > Gate<n> > Alarm, and then select either the Positive or Negative
threshold alarm condition.
6.9.2 Minimum Depth Alarm
The EPOCH 1000 Series is equipped with a minimum depth alarm that is triggered
whenever the current thickness measurement reading falls below an operator-defined
level. The minimum depth alarm can be used either with a single gate or in echo-to-
echo measurement mode.
6.9.3 Minimum Depth Alarm with a Single Gate
When the minimum depth alarm is activated, a marker appears on the gate to visually
indicate the current setting. Any indication that exceeds the gate threshold to the left
of the marker triggers the alarm.
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