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4 E
XAMPLES OF
The logger devices have at least 3 different modes of use:
Logger devices used for investigations.
•
Temporarily installed (mobile) devices.
•
(also known as "Lift and Shift" logger devices).
Permanently installed devices.
•
4.1 L
OGGERS USED FOR
These loggers can be deployed to (or indeed may already be installed on) sites that have
a suspected leak near them which is now under investigation. The logger supports
collection of some measurement history or the making of several new measurements,
including:
Obtaining logger leak-state history: Last 28 leak-noise measurements.
•
Obtaining logger leak profile history: Last 28 noise histograms.
•
Make several new pipe noise histograms (known as "Aqualogs") during the day or
•
over several days (up to a maximum of 28 measurements).
Make a sound recording at a pre-set time of the week (only a single recording
•
can be made). (Available on PCorr+ only).
Obtain synchronised sound recordings from several devices for correlation
•
purposes (one per PCorr+ logger).
The available options from the above list depend on whether they are supported by the
app you are using. They involve 2-way communication with the logger to download the
data or setup the new measurement requirement. This takes a few minutes to
complete.
Investigations can include making sound recordings for correlation purposes. This has
more demanding requirements of the loggers, discussed below.
4.2 L
OGGERS USED FOR
Many of the measurements made by the logger do not require much accuracy for the
time of measurement. The making of sound recordings, within PCorr+ devices, for
correlation purposes is an entirely different situation, being very sensitive to time.
Production of sound files for correlation is an advanced use of the PCorr+ product. For
correlation, each logger is required to have its clock precisely aligned with the others in
the set. For successful correlation results, always follow the requirements
specified in the user-guide of the app for your system.
P
U
.
RODUCT
SE
I
NVESTIGATIONS
S
R
OUND
ECORDINGS FOR
C
ORRELATION
11
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