14
4 Water leak detection
Automatic search for the best frequency range
The
A 100
has a filter-optimisation function that automatically
searches for the best frequency range. It should not be activated
if there is any significant extraneous noise, and the leak noise -
particularly ground-borne noise - should already be audible.
z
Press the
Hz key until a clear
-
ance tone sounds.
z
The
A 100
takes a „noise sam-
ple“ and analyses it.
While analysis is under way
the display indicates various
frequency ranges. The noise
produced by the filter values
displayed can be heard over
the headphones.
z
The
A 100
selects the fre-
quency range in which the leak
noise is especially clear.
4.2.4
Cursor keys
The cursor keys are used to ad
-
just the volume of the speaker or
headphones. The volume setting
is shown in the display by a bar
in reverse video.
4.2.5
Light key
The
light key switches the dis-
play illumination on and off.
It switches off automatically after
about 2 minutes.
