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EPOCH 4PLUS
The position of GATE 2 is controlled using the [GATE 2] key. When using the Backwall
Echo Attenuator option, the starting index for GATE 2 cannot precede the ending index of
GATE 1. When the width or position of GATE 1 is changed, GATE 2 will be
automatically adjusted so that the two gates cannot cover the same screen region. Also, the
EPOCH 4PLUS will not allow the user to scroll GATE 2 to the left so that the two gates
overlap. The process to adjust the starting point, width, and height of GATE 2 is the same
as detailed in section 6.2, Positioning Gate 2.
To adjust the gain within GATE 2, follow these steps:
1. Press the [GATE 2] key to select GATE 2.
2. Press the BEA GAIN key [F4]. Pressing this key highlights the Backwall Echo
Attenuator gain indicator at the top right corner of the live A-Scan display.
3. Use the up and down slewing keys to adjust the Backwall Echo Attenuator gain up and
down. This will adjust only the gain within the region covered by GATE 2.
Figure 94 Adjusting Backwall Echo Attenuator Gain
Note: The AUTO80% key [F5] is available with Backwall Echo Attenuator as
well. Pressing [F5] will adjust the gain within GATE 2 to bring the captured
echo to 80% of full screen height when possible.
9.14.4 BEA and the EPOCH 4PLUS Datalogger
Backwall Echo Attenuator setup parameters and live inspection data can be saved and
stored easily using the EPOCH 4PLUS datalogger. If data is saved using the [SAVE
THICK] key, the instrument will save only the file name, ID, and measurement value
from GATE 1. If data is saved using the [SAVE WAVE] key, the instrument will save the
file name, ID, measurement value from GATE 1, the BEA Gain Level indication, all other
instrument setup parameters, and the A-Scan. This data can be transferred to a PC for
storage and reporting via the EPOCH 4PLUS GageView Pro interface program.
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