Olympus Panametrics Epoch 4 Plus, Руководство пользователя

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EPOCH 4PLUS
Figure 28 Calibrating for a Thick Block Using a Dual Element Transducer
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 thickness of the test sample.
For this example, press [5], [0], [0]. The entry appears in the pop-up box.
If you enter an incorrect number, press [0] key multiple times to clear the entry and
then type the correct thickness.
Figure 29 Entering a Thick Standard Value
9. Press [ENTER] to complete the Auto-Calibration. The Zero Offset and Velocity
parameters adjust automatically, and the correct thickness reading of any gated echo is
displayed on the screen.
7.5 Calibrating with an Angle Beam Transducer
The sample angle beam calibration described below is performed using Olympus NDT
transducer part number A430S-SB, with a frequency of 2.25 MHz and an element
diameter of 0.625" x 0.625". The transducer is mounted on a 45
o
wedge, part number
ABWS-6-45. We recommend using either an ASTM E-164 IIW Type I or a U.S. Air Force
IIW Type II Calibration Block for this calibration procedure. The steps below use
Olympus NDT IIW Type I carbon steel calibration block, part number TB7541-1.
To calibrate using an Angle Beam transducer, follow these steps:
1. Follow the initial set-up procedure outlined in Section 7.2.