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EPOCH 4PLUS
STEP 1:
The DGS/AVG option is activated in the EPOCH 4PLUS Option Menu as shown below:
Figure 82 EPOCH 4PLUS Option Menu
To turn the DGS/AVG option on, highlight ON and press [ENTER]. The operator also
has the choice of “dB” or “FBH” (Flat Bottom Hole) for the method of echo height
evaluation compared to the DGS/AVG curve. If “dB” is chosen, the EPOCH 4PLUS will
compare a gated echo’s height to the DGS/AVG curve in terms of +/- dB. If “FBH” is
chosen, the EPOCH 4PLUS will display the equivalent flat bottom hole size for a gated
echo. This selection can be changed after the DGS/AVG setup is complete. Press
[OPTION] to continue.
STEP 2:
The operator must now choose the transducer that will be used for defect sizing. The
operator can navigate through the transducer library:
• The [F1] through [F4] function keys select the transducer type.
• The arrow keys are used to highlight individual transducers and to scroll the list.
• [ENTER] is used to select a transducer.
• [OPTION] continues to the next step.
• [F5] aborts the setup process.
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