User's Manual

ZONESCAN net 20 / 56
Version 1.4
street and street number, can be entered.
The Leak Score is specified in a range from 0 to 100. The higher the
number, the greater the probability that measurements will actually detect a
leak.
The goal of the noise measurement with loggers is to obtain as reliable a
statement as possible regarding the presence of a leak at a specific point of
the monitored water network. For the greatest reliability with respect to the
presence of even small leaks, all information that is indicative of a leak near
a logger should be included. Misinterpretations should be avoided in this
process.
The measurement values obtained from the histogram (see 2.2.2 Graphs) –
particularly the lowest ascertained sound-level value dBmin – which are a
strong general indicator of a leak, are included in the subsequent
processing.
In addition to the described histogram evaluation, the Leak Score includes,
above all, knowledge from the frequency response (spectrum). These
values are used, in particular, for removing background noise.
The correlations measured between the loggers also play a role with
respect to the assignment to the loggers.
The result is output as the Leak Score in a range from 0 to 100. The
settings for the display of a possible or probable leak are made under
Administration in Settings.
The smallest dB value measured during the last measurement.
In this field, the measurement sensitivity of the logger can be adjusted to
the environmental sound intensity.
Comments is a text field with entries on, e.g., permanent noise sources.
2.2.2 Graphs
A graph can be displayed for each leak score of a logger. To do this, select
the value in the table that you would like to visualize. Right-click to open the
context menu. Here, you can select the type of graph that is displayed. In
addition, you can insert a comment. The same menu can be opened by
right-clicking a logger on the map.
Leak Score
dBmin
dBenv
Comments