User's Manual

19
IMPORTANT: For the correlation to work accurately, the Permalogs must be
programmed together at the same time, and not separately. Warning: Swiping the
logger at any time between programming the logger and downloading the sound file
will invalidate the synchronisation, and correlation will no longer be possible.
History
The History function allows previous level and spread data from the loggers,
starting from the latest data, to be presented in the form of either 2D or 3D
histograms. These histograms will show the sound and data recorded over time.
Leak detection is then possible through careful observation.
Level + Spread History
Under the Level + Spread History tab, the loggers’ level, spread, and leak data can
be downloaded. This may span from 1 day’s to 28 days’ worth of historical data.
Select the logger to download data, and click the button. Please wait
while data is downloaded.
Once data is downloaded, it will be displayed in columns, starting with the latest
data, running through however many days’ worth.
Clicking the button will clear the data from the table.