40
8 Menu
8.4.3
Setup
Settings are saved in the setup so that you do not have to call up
the required individual functions again and again. Place the cursor
on the desired option and then press the
Enter key
.
8.4.3.1
Frequency analysis
The frequency analysis optimizes the coherence function filters
using statistical methods to achieve an optimal correlation re-
sult.
An automatic frequency analysis can be performed on ongoing
measurements and saved measurements.
Automatic
After each correlation procedure, automatic filtering is per
-
formed (see section 8.4.1).
Manual
After each correlation procedure the manual filtering menu will
appear (see section 8.4.2). The filter settings under “filter limits”
in the menu (see section 8
.
4.3.2) are used as the default.
Off
This switches off both of the processing options above.
8.4.3.2 Filter limits
Setting option for the filter settings to be used for manual filtering
(see section 8.4.3.1).
Factory setting: if you enter a
sound velocity above or below
700 m/s for a measurement, the correlator will adjust itself to:
lower limit / Hz
upper limit / Hz
< 700 m/s
5
500
Plastic
> 700 m/s
0
3000
Metal
It does not matter whether the sound velocity is entered by manu-
ally selecting the numeric value or by selecting the corresponding
pipe parameters.
