Goldanalytix BarScreenSensor Manual De Instrucciones página 26

6 Evaluation and Interpretation of the Results
The speed of sound is a material-specific property and can be used for the authentication of
precious metal bars. The ultrasonic measurement allows the complete penetration of all
common precious metal bars over 1 ounce. Through the ultrasonic measurement, the thickness
of the test object is quickly and accurately determined at a given speed of sound, thus detecting
inclusions of foreign metals with other speeds of sound. In this way, fake precious metal bars can
be reliably identified. We recommend the ultrasonic measurement with the BarScreenSensor as
a combined testing method for precious metal bars over 1 ounce.
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Adjusting the thickness:
To adjust the thickness value shown on the
display, remove the measuring head from the
ingot. The thickness remains visible on the
display. Use the Up and Down arrows to adjust
the thickness until the displayed value matches
the actual thickness of the bar. Confirm the
value by pressing the VEL button. The device
automatically calculates the appropriate speed
of sound for the bar based on the adjusted
thickness.
Scanning:
Test the bar with the calculated, correct speed
of sound, which is shown on the display. It is
advisable to scan the bar as described in the
main method. In doing so, the measuring head
is placed at various spots to ensure that no
foreign materials are enclosed in the ingot. In
case of a fake, the measured thickness would
deviate significantly
thickness.
from the expected