User's Manual

37
Filters
If correlating with pipe data entered, the default filter settings will be used depending on the
properties of the pipe. Some times this may not be accurate enough to filter out unwanted
frequencies, so the user may wish to alter the filer settings to remove certain frequencies that
are influencing the current correlation.
Press 3 (Change Filters) Displays a pox up box with four options :-
Quick set-metallic
Quick set-non metallic
Clear all
Manual settings
By using the arrow keys highlight the required option and press ENTER
Quick set-metallic removes all frequencies from 0Hz to 405Hz. So the sensors will only
listen to frequencies of 406Hz and above.
Quick set-non metallic removes all frequencies from 696Hz and above. So the sensors will
only listen to frequencies of 695Hz and below.
Clear all removes any filter settings set and will listen to all frequencies.
Manual settings allow the user to view the frequencies and set to the user preference.
The filter screen displays the frequencies heard at the two sensors in use. The bottom axis of
each graph displays the frequency level starting at 0Hz to the left. Two cursor lines are
displayed on each graph and are move by using the arrow keys. The longer dashed cursor
line is the current line selected to move. The lines on each graph will not cross. The position
of the current cursor line is displayed under the second graph, in this example 275Hz.