User's Manual

The loggers
15
3 The loggers
3.1 Function
The noise loggers are installed along a section of pipe directly on the pipe, or directly on
fittings on the pipe.
Within the configured measuring window, they perform regular noise measurements,
each 3 seconds in length. The volume level and frequency of each measurement are
saved in the logger. While the noise level alone only records the general existence of a
leak, together with the frequency it also provides information on the approximate
distance in relation to other loggers.
The measurement results gathered by the logger can be queried later using a reading
device (Commander/Reader/PC).
The quietest noise of the last measuring window is saved as an audio file. After reading
out the data, you can actually listen to the assumed leak noise and immediately decide if
it is a leak noise or background noise.
The “Real time measurement” function can be used to observe a logger “live” as it
measures (see page 58).
With the “Direct recording” function can be used to listen to a noise in a pipe (see page
63).
Communication with the loggers is performed with short range radio only.