33
Measurement close to edges and on thin materials may give erroneous
results.
Check on a known consistent material to establish the influence of
these effects.
The coating thickness measurement function does not require further
calibration, it should be accurate to better than 10 % of the displayed
value on base materials having a conductivity between approximately
1 % and 100 % IACS.
3.8
"GENERAL SETTINGS" menu
When selecting "General settings" menu, the flaw detector displays the
window with margins for the flaw detector settings correction.
Figure 23 -
"GENERAL SETTINGS" menu
Operator sets the following values in the corresponding menu lines:
-
"Test mode" – test mode. Can be "Conductivity", "Expert" and "Simple".
"Conductivity" mode is intended for conductivity and thickness measuring. In
"Simple" mode a part of operating settings is not displayed.
-
"Max smp frequency" – measurement frequency for the "TEST" mode.
Samplings frequency in Hz (sampling frequency of ECP per 1 second) from 1
kHz to 10 kHz. If the value of the selected frequency from a fixed number of
measurements set at a given operating frequency of ECP is not supported,
then the instrument will automatically determine the maximum possible
frequency of measurement.
-
"Double frequency mode" – activated when there is a possibility to
remove the interfering factor by means of frequencies mixing.
-
"Persistence" – time value, on the expiry of which all data on the flaw
detector screen is deleted (at the switched on "Persistence"), from (0,1 s 0,5 s,
1 s, 2 s, 3 s, 4 s);