910-269-EN, Rev. B, June 2011
Calibrating the EPOCH 1000 Series (Conventional UT Mode) 163
The following procedure describes only the depth distance calibration process for the
EPOCH
1000 Series. To verify the BIP and the refracted angle, and to calibrate for
sensitivity, refer to section
9.7 on page 153. The following sample angle beam
calibration is performed using an Olympus transducer part number A430S-SB with a
frequency of 2.25
MHz and an element size of 0.625 in. x 0.625 in. The transducer is
mounted on a 45° wedge, part number ABWS-6-45. An Olympus NAVSHIPS carbon-
steel calibration block, part number TB7567-1, is used.
Calibrating for Distance
The NAVSHIPS Block, which has six No. 3 side-drilled holes at various depths (see
Figure 9-30 on page 172), produces echoes at various depths on the screen in 0.25 in.
(6.35 mm) increments, which are used for depth distance calibration. This allows you
to calibrate for various inspections ranges up to 2.75
in. (69.85 mm). For this sample
calibration, the side-drilled holes at depth 0.5
in. and 1.5 in. (12.5 mm and 38 mm) are
used.
For information on distance calibration with other standard calibration blocks, see
section
9.10 on page 168.
If the EPOCH 1000 Series 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 depth distance
1. Choose 1/5 > Basic > Range, and then set the value to 4 in. (100 mm). This ensures
that the echoes from the block are visible on screen.
2. Select 1/5 > Auto CAL > CAL Mode = Depth.
3. Couple the transducer to the calibration block and move the probe backward and
forward to maximize the reflection from the side-drilled hole at depth 0.5
in.
(12.7
mm).
Press [PEAK MEM] to help find the peak of the signal.
Downloaded from ManualsNet.com search engine
To Next Page
Loading...
