Boeing 747 - Page 43

SET SCREW
TRANSDUCER
SET SCREW
TRANSDUCER
GUIDE
REFERENCE
NOTCHES
REFERENCE
STANDARD
NDT 4108
1
2
4
3
3
5
INSTRUMENT SENSITIVITY CALIBRATION
A-A
(VIEW ROTATED 90 DEGREES COUNTERCLOCKWISE)
TRANSDUCER 6
6
3
4
2
51
60%
40%
20%
100%
80%
10 0
8
6
2
4
AA
ON
OFF
10P
10N
0
0
20 40
60
E
D
U
A
+5
+1
2.25
5
1
OFF
P
/
4 6 8
10
20
0
2
4
6
8
10
%
_____ NOTES:
AND ADJUST THE SETSCREW SO IT IS TIGHT
MAXIMUM SIGNAL FROM THE REFERENCE NOTCH
TURN THE TRANSDUCER IN THE GUIDE TO GET A
10% FULL SCREEN WIDTH
INITIAL PULSE SIGNAL MUST NOT BE LARGER THAN
FOR THE CORRECT POSITION
FIRST BACK SURFACE SIGNAL. SEE TABLE 1
SIGNALS FROM MODE CONVERSION
FOR THE CORRECT SCREEN POSITION
REFERENCE NOTCH SIGNAL. SEE TABLE 1
INITIAL PULSE SIGNAL
2130649 S0000459167_V1
Sensitivity Calibration on Reference Standard NDT4108
Figure 8
747
NONDESTRUCTIVE TEST MANUAL
PART 4 54-30-06
Page 13
Nov 15/2015D6-7170
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