Calibrating With A Delay Line Transducer; Figure 9-4 Entering The Velocity Cal Thickness Value - Olympus EPOCH 650 User Manual

DMTA-10055-01EN, Rev. A, February 2015
13. Adjust the value to match the known thickness of the gated indication (0.500 in. in
this example), and then choose Done (P2 key) to complete the calibration process.
It is possible to auto-cal on a test block with only one known thickness. In this
scenario, leave the transducer coupled on the unique thickness, move the gate over to
one of the multiple back-wall echoes, and then enter the correct sound path thickness
(the appropriate multiple of the first back-wall echo) during the velocity portion of the
calibration.
9.4

Calibrating with a Delay Line Transducer

The sample delay line calibration described below is performed using Olympus
transducer part number V202-RM, with a frequency of 10.0 MHz and an element
diameter of 6 mm (0.25 in.).
150 Chapter 9

Figure 9-4 Entering the Velocity Cal thickness value