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Goldanalytix BarScreenSensor Manual De Instrucciones página 24

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Press the VEL button again so that the m/s unit
also starts flashing. This allows you to fine tune
the speed of sound using the Up and Down
arrows. Confirm the adjusted value by pressing
the VEL button again. Note that this will
overwrite the selected speed of sound with
the adjusted value. In the example, a speed of
sound of 4329 m/s has been selected.
Measuring the thickness:
Measure the thickness of the bar by using a
caliper. In the example, the thickness of the
bar is 20 mm over the entire length. For
unusually shaped ingots, you may need to
determine the thickness at several spots.
Performing the ultrasonic measurement:
Apply a sufficient amount of ultrasound gel
onto the spot you want to measure and place
the measuring head. The device outputs the
measured thickness on the display. In the
example, this value matches exactly the
previously determined thickness. The selected
speed of sound of 4329 m/s is therefore
correct at the measured spot. At this spot,
there is no foreign metal inclusion.
Scanning:
We recommend to carefully scan the bar. 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 from the expected thickness. In
the example, a thickness of only 3.3 mm was
indicated at the measured spot instead of the
expected 20 mm. The ultrasonic measurement
thus detected a foreign metal inclusion and
identified the counterfeit.
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Este manual también es adecuado para:

G-01-0010