DMTA-10009-01EN [U8778346], Rev. D, November 2016
Basic Operation
83
2.
In the menu, select the desired echo detection mode (
STANDARD
,
AUTO
E
‑
TO
‑
E
, or
MANUAL E
‑
TO
‑
E
).
3.
To perform the zero calibration again:
a)
Place a drop of couplant on the surface of the thin part of the test block.
b)
Couple the transducer to the thin part of the test block, and then press
[CAL ZERO]
.
c)
When the thickness reading is stable, press
[ENTER]
.
d)
Using the arrow keys, edit the thickness value to match the known thin
thickness of the test block.
5.6.1
Blanking Adjustments in Manual Echo-to-Echo Detection Mode
The 38DL PLUS offers two blanking functions to help detect valid echoes in situations
where material conditions generate unwanted signals:
EXT BLANK
The extended blank creates a blanked zone that begins at the left edge of the
waveform display and in which no signals are detected. In situations where the
second or third pair of back-wall echoes are stronger or cleaner than the first pair,
use the extended blank to control which pair of echoes to use for measurement.
E1 BLANK
The echo 1 (E1) blank runs for a selected interval following the first detected echo.
Use the E1 blank to exclude any unwanted peaks occurring between the first and
the second back-wall echoes. Unwanted peaks may be trailing edges of a large
first echo, or shear wave reflections on thick test pieces. The E1 blank parameter is
only available in the manual echo-to-echo detection mode.
To adjust the extended and the E1 blank parameters
1.
Select the manual echo-to-echo mode:
a)
Press
[2nd F]
,
[ZOOM] (E
‑
TO
‑
E)
.
b)
In the menu, select
MANUAL E
‑
TO
‑
E
.
2.
Press
[WAVE ADJ]
.
The wave adjustment parameter appears (see Figure 5-15 on page 84).
Summary of Contents for 38DL PLUS
Page 6: ...DMTA 10009 01EN U8778346 Rev D November 2016 Table of Contents vi...
Page 8: ...DMTA 10009 01EN U8778346 Rev D November 2016 List of Abbreviations viii...
Page 24: ...DMTA 10009 01EN U8778346 Rev D November 2016 Important Information Please Read Before Use 16...
Page 26: ...DMTA 10009 01EN U8778346 Rev D November 2016 Introduction 18...
Page 46: ...DMTA 10009 01EN U8778346 Rev D November 2016 Chapter 2 38...
Page 56: ...DMTA 10009 01EN U8778346 Rev D November 2016 Chapter 3 48...
Page 102: ...DMTA 10009 01EN U8778346 Rev D November 2016 Appendix 94...
Page 106: ...DMTA 10009 01EN U8778346 Rev D November 2016 List of Tables 98...
