User's Manual

Offline measurement - Multipoint correlation with preprogrammed sensors
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The Multi correlation gives you an overview of the noise situation along the measured
pipeline. In the ideal case, the pipe sections where leaks are most likely can be
identified at a glance.
Rate the displayed correlations.
"Good correlation"
x clear peak
x lag value is green
x lag value is not zero
Probability of a leak is high
"Bad correlation"
x more than one peak
x lag value is yellow or red
x lag value is zero or nearly zero
No leak or no clear localization possible
If the Multi correlation shows at least one "good correlation" with one clear peak, the
probability of a leak between the respective sensors is high.
Take a closer look at the good correlations. Tap the relevant thumbnail. The
Correlation menu for this sensor pair is opened.
To be able to calculate the distance to the leak the properties of the pipe have to be
specified.
You can call the Pipe data menu directly and enter the parameters for the pipe between
the two sensors.
However, we recommend instead to switch to the "Map" menu now. This menu offers a
good overview of the used sensors and the sections of the pipe. The Map menu can not
only be used to specify the pipe parameters for all pipe sections, but also to carry out
more correlations. You find detailed information about the Map function in a separate
section of this manual.
If there is no complete pipe data available, you have the chance to switch now to the
"Velocity measurement" menu.
This menu is for:
x Calculating the distance between a sensor and the leak, although material and
diameter of the pipe are unknown.
x Calculating the sound velocity in the pipe. The value can then be adopted for
further correlations.
You find detailed information on how to use the Velocity measurement function in a
separate section in this manual.
Rate correlations
How to proceed
if there are pipe data
How to proceed if there
are no pipe data