Manual Aqua M300D
page 12
7.1.2 Selecting the Filter Presetting
You can select one of three predefined filters when carrying out acoustic leak detection. Each of the filters can be
changed individually during measuring.
To select one of the predefined filter settings, navigate to the filter mode symbol (1) on the display, activate the
symbol and confirm your selection.
The window for the filter presetting selection opens.
There are three pre-settings to select from:
Fittings (2)
There is a predefined frequency range from 0 to 2,000Hz with a 200Hz high-pass filter and a 200Hz low-pass filter
which are ideal for checking the status of fittings and hydrants.
Ground (3)
There is
one
predefined
frequency range from 0 to 1,000Hz with a 50Hz high-pass filter and a 400Hz low-pass filter
which are ideal for checking the status of pipe runs. This is the factory default setting and therefore the setting when
the device is put into operation for the first time.
User (4)
This presetting uses the filter range defined by you as the user in the
frequency range
settings menu
(see chapter
6.4.5)
according to your own specific filter preferences
.
When this product leaves the factory, the frequency range is
from 0 to 1,200Hz with a 100Hz high-pass filter and a 800Hz low-pass filter.
To carry out the setting, navigate in the window to the presetting (2), (3) or (4) you wish to select, activate the particular
setting and confirm your selection by pressing the dial on the right. The window then closes and the symbol for the
selected filter setting appears as the filter mode symbol (1).
Press the Cancel key to leave the window without changing the filter setting.
Besides the predefined filters, you can also change the predefined filter frequencies manually during acoustic leak detection
operations in all the measuring modes at any time between single measurements. In order to do so, please refer to chapter
7.4.
NOTE:
The current measurement series will be cleared when any changes are carried out to the filter settings!
