Calibrating For Distance; Figure 9-19 Verifying The Refracted Angle - Olympus EPOCH 650 User Manual

9.8.3

Calibrating for Distance

The ASTM E-164 IIW Type I block, which has a crescent cut in the side, produces
echoes at 100 mm (4 in.) and 225 mm (9 in.) on the screen, which are used for sound
path distance calibration. The following procedure uses the Olympus IIW Type I
carbon steel calibration block, part number TB7541-1. For information on distance
calibration with other standard calibration blocks, see "Common Angle Beam
Calibration Block Diagrams" on page 181.
If the EPOCH 650 is set to work in metric units, the calibration process is exactly
the same, except that the entries are in millimeters rather than inches.
To calibrate for sound path distance
Choose Basic > Range, and then set the value to 300 mm (12.00 in.).
This should ensure that the echoes from the block are visible on screen.

Figure 9-19 Verifying the refracted angle

DMTA-10055-01EN, Rev. A, February 2015
Calibration 169