Calibrating the EPOCH 4PLUS
Part # 910-250C
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spreading and sound bouncing off the side of the block. Make sure Gate 1 is
not over this echo.
Figure 35 Adjusting the Gain
8. Press [VEL] once the reading is steady. The screen freezes and a pop-up box appears
again on the screen.
Use the alphanumeric keypad to enter the exact known soundpath distance for this
crescent. For this example, press [9], [0], [0], [0].
The entry appears in the pop-up box. If you enter an incorrect number, press [0]
multiple times to clear the entry and then type the correct thickness.
Figure 36 Entering a Thick Standard Value
9. Press [ENTER] to complete the Auto-Calibration. The Zero Offset and Velocity
parameters adjust automatically, and the correct soundpath readings of any gated
echoes are displayed on the screen.
7.5.4 Calibrating for Sensitivity
The final step in the angle beam calibration is to calibrate for sensitivity. This lets you set
up a reference gain level.
1. Couple the probe to the IIW calibration block so that the transducer is aimed at the
0.060" diameter side drilled hole, which is used as a reference reflector.
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