Publicidad
Idiomas disponibles
Idiomas disponibles
5
Starting and Operating the Device
Preparing the device:
Connect the measuring head to the ultrasonic analyzer to prepare the device for measurement.
It does not matter which plug is connected to which socket. In order to switch on the device,
please press the On/Off button.
CAUTION:
Please be extremely careful when disconnecting the measuring head after using the
device. Use the mechanism by pushing back the silver cap. If the plug is forcibly removed
without using the mechanism, damage to the cables and sockets may result.
Calibrating the device:
The first step is to calibrate the device using the included stainless steel calibration piece. The
calibration should be performed each time the device is switched on, as well as after replacing
the measuring head and/or the batteries. Apply a sufficient amount of ultrasound gel onto the
stainless steel calibration piece and/or the measuring head, and gently press the measuring head
onto the probe. Press the CAL button on the device for 2 seconds to enter the calibration mode.
Please wait until the display shows 4.0 mm. This signals the completion of the calibration.
Performing measurements:
In this section, the use of the ultrasonic analyzer for the authentication of precious metal ingots
is explained. The bar in the selected example was divided in the middle and drilled holes were
made, which were then filled with lead. This method is frequently used in the counterfeiting of
silver bars with lead-tin alloys.
IMPORTANT:
Direct contact between the measuring head and the test object is required to
perform a measurement. Measurements through blisters, capsules, or foils are not possible.
Therefore, the test objects must be removed from their packaging for the ultrasonic
measurement.
Authenticity testing for a known speed of sound (main method):
Display
Procedure
Adjusting the speed of sound:
The speeds of sound for common (precious)
metals can be found on page 28.
To adjust the speed of sound, press the VEL
button twice in the menu until the VEL icon
starts flashing. Use the Up and Down arrows to
navigate between the preset speeds of sound
and select the appropriate value. If your
required speed of sound is not included in the
preset values, select the one closest to your
required value.
21
Publicidad
