Boeing 747 - Page 28

(50 MM)
A-A
2.0 INCHES
SIGNALS SHOW SOUND TRAVEL TO A DEPTH OF
THROUGH THE REFERENCE STANDARD.
2 INCHES (50.8 MM) AND 4 INCHES (101.6 MM)
80%
100%
40%
60%
4
2
6
8
0
10
20%
NOTES:
_____
FIRST
BACK SURFACE SIGNAL - SET AT 40% FULL SCREEN WIDTH
INITIAL PULSE SIGNAL
OF THE TRANSDUCER GUIDE
SECOND BACK SURFACE SIGNAL - SET AT 80% FULL SCREEN WIDTH
MODE CONVERSION SIGNALS - IGNORE THESE SIGNALS
SOUND WAVES
TRANSDUCER
REFERENCE STANDARD
(NOT TO SCALE)
TRANSDUCER
GUIDE
TRANSDUCER
GUIDE
POSITION 1
SET SCREW
TRANSDUCER
THE FIRST AND SECOND BACK SURFACE SIGNALS
WHEN THE TRANSDUCER IS AT POSITION "A"
ON REFERENCE STANDARD NDT4106. THESE
(40%) (80%)
PUT THE BOTTOM OF THE TRANSDUCER EQUAL WITH THE BOTTOM
1
4
3
4
1
2
5
1
4
3
2
5
A
NDT4106
A
B
B
B-B
L
A
U
D
%
10
8
6
4
2
0
0 2
10
864
/
P
OFF
1
5
2.25
+1
+5
E
60
4020
0
0
10N
10P
OFF
ON
2130619 S0000459155_V1
Screen Calibration
Figure 4
747
NONDESTRUCTIVE TEST MANUAL
PART 4 54-30-05
Page 8
Nov 15/2015D6-7170
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ALL