8
3.4 Measurement of thickness
First, set the sound velocity and then coat the coupling agent at the place
to be measured, couple the probe with the material to be measured, now
you can begin the measurement. The screen will display the thickness of
material to be measured. After you remove the probe, the thickness value
will be maintained, while the coupling indicator will disappear.
Note
: when the probe is coupled with the material to be measured, the
instrument will display the coupling indicator; if the indicator flashes or
doesn't appear, it means that the coupling is not so good.
3.5 Zero calibration
Select the correct transducer frequency
，
The sound velocity adjusted to
5900m / s
，
While the gain is set to use when measuring the gain
，
Then the
probe with the case on 4mm standard test block and displayed good
coupling signs
，
Zero point calibration by the
key. Instruments buzzer
about the same time, the screen instructions to complete the
calibration: calibrate zero done, That the calibration is complete, while
calibration data is stored in the instrument, If want to erase the
calibration data, please operate according to memory manage,
If the instrument before the
keys are not well coupled with the
standard test block completion instructions or display calibration is not
succeed, the calibration instrument will retain the original value, the
screen display process as shown below:
