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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:
3. Use the [ ], [ ], [
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.
Part # 910-250C
You can also access the start, width, and level by pressing [GATE 1]
multiple times.
], and [
] keys to position the gate.
Using the Gates
45
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