7
Sound velocity of last turnoff
Note: 5900 m/s= 0.232 inch/
μ
s
5.2 The adjustment of sound velocity
If the screen currently displays the thickness values, then push the VEL-key to enter into sound
velocity state. The screen will display the content of the current memory unit of sound velocity.
Each time the VEL-key is pushed the sound velocity memory unit will change. Five different
sound velocity values will be displayed in turn. If the current displayed sound velocity is desired to
be changed, the keys - can be used to adjust the display the desired value. This value will be
stored automatically as one out of five stored velocities.
8
Push VEL-key to enter into state of sound velocity
Value after adjustment by - key
5.3 Calibration
Each time the probe or battery is changed, calibration should be performed. This step is rather
critical to secure the measuring accuracy. If necessary, calibration can be repeated several times.
Put the coupling agent on the testing block supplied with the unit, set the sound velocity to
5900m/s then couple the probe with the testing block. Push the ZERO-key and enter into the state
of calibration, the screen display as follow:
