TM 1-1520-264-23
Figure 1-8. Typical Metal Sorting Display
Electrical equipment shall not be operated in areas where combustible gases or vapors may be present,
unless the equipment is explosion-proof.
a.
If instrument is operated using AC power, use a grounded power cord.
b.
Turn power OFF before connecting or disconnecting transducer cable or power cable.
1.4.12.2 Ultrasonic Instrument Standardization. The ultrasonic instrument used in ultrasonic inspection procedures
described throughout this manual is listed in Table 1-7. Reference blocks, instrument settings, and standardization
instructions for the ultrasonic instrument are included in the individual ultrasonic inspection procedures. Because of
varied circumstances under which the inspections may be performed, instrument settings, as they are given in this
manual, should be considered typical. Slight adjustment to the settings may be necessary to achieve the desired CRT
presentation. Illustrations representing typical. CRT presentation will, in most cases, include reference signals
representing initial pulse, transducer, and/or wedge echoes that have been moved off the scope to make room for
relevant indications. An effective ultrasonic inspection will depend largely upon the proper handling of the transducer;
therefore, the following steps are recommended:
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