Using the Gates
Part # 910-250C
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6 Using the Gates
This chapter describes how to use the gates in the EPOCH 4PLUS.
Topics are as follows:
• Positioning Gate 1
• Positioning Gate 2
• Taking Thickness Readings
• Taking Echo-to-Echo Thickness Readings
• Locating Flaws with an Angle Beam Transducer
• Measuring Signal Amplitude
• Operating Time-of-Flight Mode
• Using the Zoom Feature
• Activating Gate Alarms
6.1 Positioning Gate 1
Gate 1 is the primary flaw gate. It provides thickness readings in both the A-Scan and
unrectified RF displays, soundpath data when using an angle beam transducer, signal
amplitude, time of flight data, or a trigger for minimum depth or threshold alarms.
Movement of Gate 1 is controlled via the red [GATE 1] key.
To access the starting position, width, or level of Gate 1, follow these steps:
1. Press [GATE 1].
2. Press the appropriate function key.
Tip: You can also access the start, width, and level by pressing [GATE 1]
multiple times.
3. Use the [], [], [], and [] keys to position the gate.
6.2 Positioning Gate 2
Gate 2 is a secondary gate and is used when making Echo-to-Echo thickness readings or
when multiple alarm gates are required.
To access Gate 2, follow these steps:
1. Press [GATE 2] to view Gate 2 controls.
2. Press [F4] for ON. The movement of Gate 2 is done in the same manner as Gate 1.
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